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Mochizuki Yuuki

Faculty of Engineering　Center for Advanced Research of Energy and Materials　Labratory of Chemical Energy ConversionsSpecially Appointed Assistant Professor

Researcher basic information

■ Degree
  • 博士(工学), 秋田大学
■ URL
researchmap URL■ Various IDs
J-Global ID■ Research Keywords and Fields
Research Keyword
  • 環境化学
  • 触媒変換化学
  • 有機資源化学
Research Field
  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering), Chemical reaction and process system engineering
  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering), Catalyst and resource chemical process
  • Environmental Science/Agriculture Science, Environmental materials and recycle technology
  • Environmental Science/Agriculture Science, Environmental load reduction and remediation
  • Energy Engineering, Earth resource engineering, Energy sciences

Research activity information

■ Awards
  • 2025, Advances in Engineering, Canada, Key Scientific Article (Advances in Engineering, Canada)
    -Selective Separation of Li, Ni, Co and Mn from Model Spent Li Ion Battery Cathode Materials by Dry Processing Using the Combination of Chlorination and Oxidation
  • 2020, 日本鉄鋼協会, 日本鉄鋼協会共同研究賞 (山岡賞)
    劣質石炭資源のコークス化技術
  • 2018, 日本鉄鋼協会, 日本鉄鋼協会第 176 回秋季講演大会優秀賞
    鉄鉱石の熱処理過程における水銀の放出
    Javzandolgor Bud;望月友貴;坪内直人
  • 2017, 日本エネルギー学会, 日本エネルギー学会奨励賞
    タール由来炭素質物質による低強度コークスおよびチャーの高強度化
    望月友貴、窪田征弘、上坊和弥、坪内直人
  • 2017, 日本エネルギー学会, 日本エネルギー学会石炭科学会議優秀賞
    褐鉄鉱を用いるタール中窒素の分解除去：褐鉄鉱のピリジン分解性能に及ぼす共存ガスの影響
    小川歩、望月友貴、坪内直人
  • 2012, 29th Annual International Pittsburgh Coal Conference, Honorable Mention Technical Poster Award (29th Annual International Pittsburgh Coal Conference)
    Effects of Nitrogen and Sulfur on Coal Fluidity during Carbonization
■ Papers
■ Other Activities and Achievements
  • Highly Selective Recovery of Phosphorus in Steelmaking Slag by Chlorination and Carbon Reduction (Division of Environmental Chemistry)
    Naoto Tsubouchi; Jiaqian Liu; Yuuki Mochizuki, Abstracts of Papers of the American Chemical Society, 270 (Web), 2025, [Peer-reviewed]
  • 2-06 Reactions of HCl Gas with Oxygen-blown Gasification Chars
    MOCHIZUKI Yuuki; TSUBOUCHI Naoto; HAZEKI Kenta; YASUTOMI Toshinori, Proceedings of Conference on Coal Science, 61, 40, 41, 23 Oct. 2024
    To elucidate the mechanism of chlorine (Cl) enrichment in oxygen-blown gasification chars, the chemical forms of Cl on the gasification chars collected from actual equipment and the reactivity of the chars with gaseous HCl were investigated. It was found that Cl exists as both of inorganic and organic forms on the surface of the char by XPS and XRD analyses. When as-received chars were treated with water, Cl, Na, and K contents were greatly reduced. HCl treatment of each char showed that the behavior of HCl concentration at the reactor outlet depended on the treatment temperature. In addition, the recovery rate of HCl concentration at the reactor outlet tended to be higher for the water-treated chars compared to the as-received chars., The Japan Institute of Energy, Japanese
  • 2-06 Reactions of HCl Gas with Oxygen-blown Gasification Chars
    望月友貴; 坪内直人; 櫨木健太; 安冨寿徳, 日本エネルギー学会石炭科学会議発表論文集(Web), 61, 2024
  • アルミニウムドロスからの有価物製造と不純物除去を同時達成～産業廃棄物のカーボンリサイクル型処理技術開発への貢献に期待～
    坪内直人; 望月友貴, 北海道大学ホームページ『プレスリリース (研究発表)』, Web, 2024
  • 下水汚泥焼却灰からリンを選択的に回収～二次リン資源中のリンの選択的分離回収技術の開発へ～
    北海道大学ホームページ『プレスリリース, Web, 2024
  • Recovering Phosphorus from Sewage Sludge Ash
    Naoto Tsubouchi; Yuuki Mochizuki; Sohail Keegan Pinto, Hokkaido University Website "Research Press Release", Web, 2024
  • Selective Separation and Recovery of Phosphorus from Sewage Sludge Incineration Ash Using Chlorination and Carbo-Chlorination Methods (Division of Environmental Chemistry)
    Naoto Tsubouchi; Jiaqian Liu; Yuuki Mochizuki, Abstracts of Papers of the American Chemical Society, 268 (Web), 2024, [Peer-reviewed]
  • Effect of pretreatment on gangue removal from iron ore by alkali-hydrothermal treatment
    蘇本超; 望月友貴; 坪内直人; 樋口謙一, 材料とプロセス(CD-ROM), 36, 1, 2023
  • Removal of gangue components iniron ore by alkali-hydrothermal treatment using a flow-type reactor
    蘇本超; 望月友貴; 坪内直人; 樋口謙一, 材料とプロセス(CD-ROM), 36, 2, 2023
  • MLA analysis of iron ore after alkali hydrothermal treatment
    村尾玲子; 樋口謙一; 望月友貴; 坪内直人, 材料とプロセス(CD-ROM), 36, 2, 2023
  • Alkaline Hydrothermal Treatment for Model Compounds of Gangue Components Present in Iron Ores (Division of Environmental Chemistry)
    Benchao Su; Yuuki Mochizuki; Kenichi Higuchi; Naoto Tsubouchi, Abstracts of Papers of the American Chemical Society, 266 (Web), 1, 2023, [Peer-reviewed]
  • 2-17 Production of high-strength coke from formed coal with large amounts of low-quality coal
    TSUBOUCHI Naoto; WANG Yuting; MOCHIZUKI Yuuki; KONNO Saori; SHISHIDO Takahiro, Proceedings of Conference on Coal Science, 59, 62, 63, 13 Oct. 2022
    Formed samples with a weight ratio of caking coal : slightly-caking coal : non-caking coal = 15:45:40 were first heated rapidly to 450-600°C at 10-40°C/min under pressure in a stream of pure He, and the temperature was then increased to 800°C at a slow heating rate of 3°C/min under ambient pressure. When the temperature range of the rapid heating was increased from room temperature-450°C to room temperature-600°C, the adhesiveness between coal particles increased and the strength of the resulting coke increased significantly. In addition, the strength of 800°C coke tended to increase with increasing the rapid heating rate. Furthermore, the strength tended to be higher at larger pressure, and the optimum pressure was 1 MPa under the present conditions., The Japan Institute of Energy, Japanese
  • 2-16 Production of high-strength coke from formed coal containing biomass resources
    TSUBOUCHI Naoto; WANG Yuting; MOCHIZUKI Yuuki; KONNO Saori; SHISHIDO Takahiro, Proceedings of Conference on Coal Science, 59, 60, 61, 13 Oct. 2022
    Formed samples containing biomass (cedar wood powder) were heated first to 450-600°C at 10-40°C/min under pressure in an inert atmosphere and then to 800°C at 3°C/min under ambient pressure. The principal conclusions were summarized as follows: (1) Rapid heating treatment in the softening and melting temperature range of coal was effective in improving coke strength even in the presence of biomass. (2) Formed samples containing 3-5 % biomass without any pretreatment could produce coke of 4-5 MPa, though the coke strength was lower than that of standard blended coal. (3) It was found that biomass modified in 1-methylnaphthalene could maintain the coke strength at the standard blended coal level (approximately 9 MPa)., The Japan Institute of Energy, Japanese
  • 2-05 Influence of Ammonia Treatment on the CO2 Adsorption of Activated Carbon Prepared from Biomass
    MOCHIZUKI Yuuki; BUD Javzandolgor; TSUBOUCHI Naoto; BYAMBAJAV Enkhsaruul, Proceedings of Conference on Coal Science, 59, 38, 39, 13 Oct. 2022
    The objectives of this investigation were to prepare an adsorbent with high CO2 adsorption capacity and to clarify the effect of N-doping on the CO2 adsorption of activated carbon (AC). First, N-doped AC (NH3-AC) was prepared by NH3 treatment of AC prepared from biomass, and its CO2 adsorption amount was evaluated. Next, chemical and pore property analyses of the NH3-AC were performed to clarify the effect of N-species on the CO2 adsorption ability. CO2 adsorption ability of AC improved by NH3 treatment until 400°C. In contrast, the ability of NH3-AC prepared at 500°C or higher decreased with increasing NH3 treatment temperature. When the NH3 treatment temperature was <200 and 700-800°C, N% in NH3-AC increased. N1s XPS analysis showed that N in NH3 was mainly incorporated into the AC as pyridinic-N. Pore analysis showed that micropores of 0.55-0.85nm decreased when the NH3 treatment temperature was >500°C. It was concluded that the decrease in CO2 adsorption ability was due to the reduction in micropores. However, no significant change was observed in the pore properties of NH3-AC prepared at NH3 treatment temperature of 200-400°C, suggesting that the increase in CO2 adsorption ability was due to the formation of basic sites by the pyridinic-N introduced during NH3 treatment., The Japan Institute of Energy, Japanese
  • Release Behavior of Mercury during Heat Treatment of Coal and Iron Ore
    坪内直人; 望月友貴; JAVZANDOLGOR Bud, 材料とプロセス(CD-ROM), 35, 1, 2022
  • 2-05 Influence of Ammonia Treatment on the CO2 Adsorption of Activated Carbon Prepared from Biomass
    望月友貴; BUD Javzandolgor; 坪内直人; BYAMBAJAV Enkhsaruul, 日本エネルギー学会石炭科学会議発表論文集(Web), 59, 2022
  • 2-16 Production of high-strength coke from formed coal containing biomass resources
    坪内直人; WANG Yuting; 望月友貴; 今野沙緒梨; 宍戸貴洋, 日本エネルギー学会石炭科学会議発表論文集(Web), 59, 2022
  • 2-17 Production of high-strength coke from formed coal with large amounts of low-quality coal
    坪内直人; WANG Yuting; 望月友貴; 今野沙緒梨; 宍戸貴洋, 日本エネルギー学会石炭科学会議発表論文集(Web), 59, 2022
  • 2-04 CO2 adsorption performance of activated carbon prepared from various carbon resources
    MOCHIZUKI Yuuki; BUD Javzandolgor; TSUBOUCHI Naoto, Proceedings of Conference on Coal Science, 58, 30, 31, 19 Oct. 2021
    In this study we prepared porous carbon samples from various carbonaceous materials, such as biomass and coal, and evaluated their CO2 adsorption performance. First, activated carbons were prepared by heat treatment of a mixture of melamine as a nitrogen source and K2CO3 as a chemical activator added to the carbonaceous resource, and their pore properties were investigated in detail. Then, the CO2 adsorption performance of the prepared activated carbons was tested. It was found that activated carbon with well-developed pores could be prepared by using carbonaceous resources with low carbon and low ash contents. The specific surface area (SAA), micropore volume and CO2 adsorption of the prepared activated carbon showed relatively good correlation. In other words, we found that the SAA and micropore volume affected the CO2 adsorption performance. Additionally, the optimum micropore diameter for CO2 adsorption was identified as 0.7–1.0nm., The Japan Institute of Energy, Japanese
  • Strength and gasification reactivity of coke prepared from blending of Ca/C composite and caking coal
    望月友貴; 汪雨亭; 高橋美樹; 坪内直人, 材料とプロセス(CD-ROM), 34, 1, 2021
  • Effects of some factors on gangue removal from iron ore by alkali hydrothermal treatment
    望月友貴; KURNIAWAN Ade; 能村貴宏; 坪内直人; 樋口謙一, 材料とプロセス(CD-ROM), 34, 2, 2021
  • 2-04 CO2 adsorption performance of activated carbon prepared from various carbon resources
    望月友貴; BUD Javzandolgor; 坪内直人, 日本エネルギー学会石炭科学会議発表論文集(Web), 58, 2021
  • Influence of Additive Amount and Heating Conditions on the Strength of Coke Prepared from Non-Caking Coal
    Tsubouchi Naoto; Naganuma Ryo; Mochizuki Yuuki; Hayashizaki Hideyuki; Shishido Takahiro, Tetsu-to-Hagane, 107, 1, 35, 43, 2021
    In the present study, we prepare several types of specimens from non-caking coal – including specimens in which noncovalent bonds between O-functional groups in coal are cleaved by pyridine and HPC-derived thermoplastic components are introduced into the pores produced by swelling, as well as specimens consisting of physical blends with HPC – and examine the influence of heating conditions and types of caking agents on the production of high-strength coke using a SUS tube. We also investigate the influence of heating conditions and types of caking agents on the strength of coke from pelleted specimens and determine the optimal conditions for producing high-strength coke from non-caking coal. HPC with a wide range of thermoplastic properties is more effective as caking agents than additives containing only low-molecular-weight or high-molecular-weight components. In addition, the strength of the produced coke depends on the amount of the additive, and optimal values of the additive amount are present. It was found that the following heating schedule is effective for producing high-strength coke from non-caking coal with added caking agents: First, high-speed heating (20ºC/min) to an intermediate temperature in the range 400-600ºC, recognized as the thermoplastic temperature range for typical caking coal; then, low-speed heating (3ºC/min) to the temperature range of 900-1000ºC. Moreover, we demonstrate that, by increasing the rate of heating in the thermoplastic temperature range, it is possible to reduce the amount of caking agent added., The Iron and Steel Institute of Japan, Japanese
  • 3-28 Separation of valuable element from rice husk by chlorination method and Hg ion adsorption ability of the chlorinated residue
    LIU Jiaqian; MOCHIZUKI Yuuki; TSUBOUCHI Naoto, Proceedings of the Annual Conference of The Japan Institute of Energy, 29, 92, 93, 29 Jul. 2020
    In this study, as a part of the study of SiCl4 production from rice husk char, the volatilization behavior of Si from rice husk char by the chlorination method were first examined with a gas flow-type fixed-bed quartz reactor. Next, changes in Cl content and pore properties with chlorination temperature were investigated. In addition, the basic Hg2+ removal performance of the residue obtained after chlorination was evaluated. The volatilization of Si in the char during chlorination started at 300°C, and volatilization rate reached 80% at 1000°C, 10min. It was also found that most of the Cl taken into the chlorination residue is the H2O-insoluble form. The specific surface area of the chlorination residue tended to increase with increasing of chlorination temperature. The Hg adsorption capacity of the chlorinated residue obtained by holding at 1000°C for 10min was 620mg/g, which indicated that the chlorinated residue could be a relatively high-performance mercury scavenger., The Japan Institute of Energy, Japanese
  • Separation of valuable elements from steelmaking slag by chlorination method
    望月友貴; 劉佳倩; 坪内直人; 菅原勝康, 材料とプロセス(CD-ROM), 33, 1, 2020
  • 塩化揮発法による鉄鋼スラグの高効率資源化技術の開発
    望月友貴; 坪内直人; 菅原勝康, 環境助成研究成果 概要集 第38回・2017年度分:11件 第39回・2018年度分:23件 令和2年度, 2020
  • 3-28 Separation of valuable element from rice husk by chlorination method and Hg ion adsorption ability of the chlorinated residue
    LIU Jiaqian; 望月友貴; 坪内直人, 日本エネルギー学会大会講演要旨集(Web), 29, 2020
  • 2-19 Removal of Hydrogen Chloride Gas in Fuel Gas Using Honeycomb-Supported Natural Soda Ash
    Mochizuki Yuuki; Fukuyama Ken; Matsuoka Natsumi; Tsubouchi Naoto, Proceedings of Conference on Coal Science, 56, 84, 85, 22 Oct. 2019
    In this study, the HCl absorption performance in simulated coal gasification fuel gases of cheap natural soda ash loaded on a honeycomb support as a hot gas cleanup method is investigated by using flow-type fixed-bed reactor. The HCl removal performance of the honeycomb-supported soda ash at 500°C in 1000ppm HCl/12-28%H2/N2 reveals that H2 does not affect the HCl absorption ability. On the other hand, the coexistence of 26-58%CO to 1000ppm HCl/12-28%H2/N2 decreases the HCl removal performance by carbon deposition from disproportionation reaction of CO. However, the addition of 2-10%CO2 to 1000ppm HCl/12-28%H2/26-58%CO/N2 improves the HCl absorption ability. In addition, the HCl removal performance of the honeycomb-supported soda ash in HCl/12%H2/26%CO/6%CO2/N2 depends on the HCl concentration (500-2000ppm) and reaction temperature (300-600°C)., The Japan Institute of Energy, Japanese
  • 水熱処理による低品位鉄鉱石中の脈石成分の除去
    望月友貴; 坪内直人, 材料とプロセス(CD-ROM), 32, 2, 2019
  • 2-19 Removal of Hydrogen Chloride Gas in Fuel Gas Using Honeycomb-Supported Natural Soda Ash
    望月友貴; 福山健; 松岡夏実; 坪内直人, 日本エネルギー学会石炭科学会議発表論文集(Web), 56, 2019
  • Regeneration of Spent Denitration Catalyst of Coal Fired Power Plant
    Takahiro Kato; Kosuke Sakusabe; Yuuki Mochizuki; Hirokazu Okawa; Katsuyasu Sugawara, Abstract of ACS Fall 2019 National Meeting & Exposition, 2019
  • Evolution of Mercury during Iron Ore Sintering
    Javzandolgor Bud; Yuuki Mochizuki; Naoto Tsubouchi, Abstracts of the 18th Asian Pacific Confederation of Chemical Engineering Congress, APCChE2019 Web, 2019
    English
  • Adsorptive Removal of Organic Sulfur from Hydrocarbon Liquid Model Fuel by Ni-Loaded Carbon Prepared from Lignite
    Yuuki Mochizuki; Junpei Watanabe; Naoto Tsubouchi, Abstracts of the 18th Asian Pacific Confederation of Chemical Engineering Congress, APCChE2019 Web, 2019
    English
  • Release Behavior of Mercury during Iron Ore Sintering Process (Division of Environmental Chemistry)
    Naoto Tsubouchi; Javzandolgor Bud; Yuuki Mochizuki, Abstracts of Papers of the American Chemical Society, 258, 2019, [Peer-reviewed]
    English
  • Dynamic Behavior of Mercury Release during Coal Carbonization and Iron Ore Sintering (Division of Environmental Chemistry)
    Naoto Tsubouchi; Javzandolgor Bud; Yuuki Mochizuki, Abstracts of Papers of the American Chemical Society, 257, 2019, [Peer-reviewed]
    English
  • No.2-31 Gasification reactivity of low strength coke and pyrolyzed char enhanced in strength by tarry material
    Mochizuki Yuuki; Tsubouchi Naoto; Kubota Yukihiro; Uebo Kazuya, Proceedings of Conference on Coal Science, 55, 112, 113, 22 Oct. 2018
    Carbon/carbon composites are prepared by pyrolysis of mixture of COG tar and low grade cokes or pyrolyzed chars from lignite and sub-bituminous coals. The indirect tensile strength of each composite prepared reaches about 7.5MPa, which is comparable to that of high grade coke used in commercial blast furnaces. Although the CO2 gasification rates of composites prepared from low grade cokes become lower than those of original samples, those of composites from pyrolyzed chars are almost same. From the results of O2 adsorption TPD runs of samples before and after compositing, it is suggested that the decreasing gasification rates of composites prepared from cokes may occurs due to decrease in active sites on original cokes for gasification., The Japan Institute of Energy, Japanese
  • 石炭乾留時のガス生成とコークス強度の関係
    望月友貴; 坪内直人, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2017, 2018
  • 石炭と鉄鉱石の加熱過程における水銀の放出挙動
    JAVZANDOLGOR Bud; 望月友貴; 坪内直人, 化学系学協会北海道支部冬季研究発表会(Web), 2018, 2018
  • 軟化溶融成分を修飾した劣質炭からの高強度コークスの製造
    坪内直人; 永沼遼; 望月友貴; 林崎秀幸; 宍戸貴洋, 材料とプロセス(CD-ROM), 31, 1, 2018
  • 天然ソーダ灰から調製したイオン交換ナトリウム触媒を用いる低炭化度炭の水蒸気ガス化
    坪内直人; 望月友貴; 花岡裕; 大塚康夫, 材料とプロセス(CD-ROM), 31, 1, 2018
  • 褐鉄鉱へのガス状タールの気相蒸着による炭素内装鉱の製造
    望月友貴; 坪内直人; 秋山友宏, 材料とプロセス(CD-ROM), 31, 1, 2018
  • No.2-31 Gasification reactivity of low strength coke and pyrolyzed char enhanced in strength by tarry material
    望月友貴; 坪内直人; 窪田征弘; 上坊和弥, 日本エネルギー学会石炭科学会議発表論文集(Web), 55, 2018
  • 鉄鉱石の熱処理過程における水銀の放出
    BUD Javzandolgor; 望月友貴; 坪内直人, 材料とプロセス(CD-ROM), 31, 2, 2018
  • Removal of Dibenzothiophene in a Liquid Hydrocarbon Fuel by Ni-Loaded Carbon Prepared from Lignite
    Yuuki Mochizuki; Junpei Watanabe; Naoto Tsubouchi, Proceedings of the 14th Japan-China Symposium on Coal and C1 Chemistry, USB, 2018
    English
  • Preparation of Pelletized Coke by Co-Carbonization of Caking Coal and Pyrolyzed Char Modified with Tar Generated during Pyrolysis of Woody Biomass
    Yuuki Mochizuki; Naoto Tsubouchi, Proceedings of the 14th Japan-China Symposium on Coal and C1 Chemistry, USB, 2018
    English
  • Production of High-Surface-Area Activated Carbon from Peat by Chemical Activation with Natural Soda Ash
    Javzandolgor Bud; Megumi Nishio; Yuji Shinohara; Yuuki Mochizuki; Naoto Tsubouchi, Proceedings of the 14th Japan-China Symposium on Coal and C1 Chemistry, USB, 2018
    English
  • Production of High-Strength Cokes from Low-Quality Coals Chemically-Loaded with Thermoplastic Components
    Naoto Tsubouchi; Ryo Naganuma; Yuuki Mochizuki; Hideyuki Hayashizaki; Takahiro Shishido, Proceedings of the 14th Japan-China Symposium on Coal and C1 Chemistry, USB, 2018
    English
  • Removal of Hydrogen Chloride Gas Using Natural Soda Ash
    Naoto Tsubouchi; Natsumi Matsuoka; Yuuki Mochizuki, Proceedings of the 14th Japan-China Symposium on Coal and C1 Chemistry, USB, 2018
    English
  • Mercury Release during Coal Carbonization and Iron Ore Sintering
    Javzandolgor Bud; Yuuki Mochizuki; Naoto Tsubouchi, Proceedings of the 2nd Australia-Japan Symposium on Carbon Resource Utilization, USB, 2018
    English
  • Fate of the Chlorine in Coal in the Temperature-Programmed Pyrolysis of Twenty Nine Coals
    Naoto Tsubouchi; Yuuki Mochizuki; Yanhui Wang; Yasuo Ohtsuka, Proceedings of the 22nd International Symposium on Analytical and Applied Pyrolysis, USB, 2018
    English
  • タール由来炭素質物質による低品位コークスおよび熱分解チャーの高強度化
    望月友貴; 坪内直人; 窪田征弘; 上坊和弥, 日本学術振興会石炭・炭素資源利用技術委員会研究会資料, 163, 61, 66, 2018, [Invited]
    Japanese, Introduction scientific journal
  • ガス状タールの気相蒸着により調製した炭素内装鉱の強度と還元反応性
    MA Jun; 望月友貴; 坪内直人; 秋山友宏, 材料とプロセス(CD-ROM), 30, 2, ROMBUNNO.PS‐14, 21 Aug. 2017
    Japanese
  • 安価な低品位褐鉄鉱を用いるコークス炉ガス中の含窒素化合物の分解除去法の開発
    坪内直人; 望月友貴, 環境助成研究成果 概要集 第35回・2014年度分:5件 第36回・2015年度分:28件 平成29年, 2017
  • 石炭の低温乾留時における水銀の放出
    JAVZANDOLGOR Bud; 望月友貴; 坪内直人, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2017, 2017
  • 褐鉄鉱によるコークス炉ガス中の硫化水素とアンモニアの除去
    望月友貴; 小川歩; 坪内直人, 材料とプロセス(CD-ROM), 30, 1, 2017
  • 乾留タールと低強度のコークスおよびチャーからの高強度炭素/炭素複合体の調製
    MA Jun; 望月友貴; 坪内直人; 上坊和弥, 材料とプロセス(CD-ROM), 30, 1, 2017
  • 石炭乾留時における塩化水素の生成に及ぼす諸因子の検討
    坪内直人; 望月友貴, 材料とプロセス(CD-ROM), 30, 2, 2017
  • No.2-19 Removal of dibenzothiphene in model fuel by Ni-loaded carbon prepared from lignite
    望月友貴; 渡邉純平; 坪内直人, 日本エネルギー学会石炭科学会議発表論文集(Web), 54, 2017
  • Fate of the Chlorine in Coal in the Heating Process
    Tsubouchi Naoto; Mochizuki Yuuki; Wang Yanhui; Ohtsuka Yasuo, Tetsu-to-Hagane, 103, 8, 443, 450, 2017
    Pyrolysis of 29 coals with carbon contents of 71-92 mass% on a dry, ash-free basis (daf) has been performed mainly in a temperature-programmed mode at 10ºC/min up to 800ºC with a flow-type fixed bed quartz reactor, and some factors controlling HCl formation have been examined. The rate profiles of HCl formation exhibit at least three distinct peaks at around 260-360, 470-510 and 580-630ºC, and the lowest temperature peak is present for 8 coals alone, whereas the middle and highest temperature peaks are common with almost all of the coals. The HCl profile is also affected by the size of coal particles and the height of coal particles in the fixed bed. Yields of HCl and char-Cl at 800ºC for 28 coals except an American bituminous coal are 44-95 and 4-54%, respectively, and tar-Cl is as low as ≤ 7% in all cases. The chlorine distribution is almost independent of the heating rate in the range of 2.5-400ºC/min and has no distinct relationship with carbon or chlorine content in coal, but HCl tends to increase with increasing amount of (Na + 2Ca) in coal with a corresponding decrease in char-Cl. When an Indonesian sub-bituminous coal is injected into an O2-blown entrained bed gasifier under pressure, there is an almost 1:1 relationship between carbon and nitrogen conversions, whereas the sulfur and chlorine are enriched in the remaining char, and the degree of the enrichment is higher with chlorine. The method of evaluating coal-Cl forms quantitatively using model chlorine compounds is proposed., The Iron and Steel Institute of Japan, Japanese
  • P-1-1 Preparation of high-surface-area activated carbon from peat
    Nishio Megumi; Mochizuki Yuuki; Tsubouchi Naoto, Proceedings of the Annual Conference of The Japan Institute of Energy, 26, 254, 255, 2017
    The optimum preparation conditions of high-surface-area activated carbon (AC) from peat, urea and natural soda ash have been investigated with a flow-type quartz-made fixed bed reactor. Heating rate and pyrolysis temperature are 10 °C/min and 500-900 °C, respectively. The BET surface area of AC prepared from the mixture of peat/urea/Na2CO3 with mass ratio of 1.0/1.0/2.0 increases with increasing temperature and reaches about 1000 m2/g at 800 °C. When peat/urea/Na2CO3 mixing ratio is changed to 0.5-2.0/0.5-3.0/1.0-4.0, the surface area of AC prepared increases with increasing amount of urea. The N content of AC precursor strongly affects the surface area of AC. In addition, the XRD analyses of AC prepared show that the peak intensity attributable to C(002) increases with increasing temperature. It is thus likely that the optimum heat treatment temperature and mixing ratio are 800 °C and peat/urea/Na2CO3 = 1.0/1.0-3.0/2.0, respectively., The Japan Institute of Energy, Japanese
  • No.2-19 Removal of dibenzothiphene in model fuel by Ni-loaded carbon prepared from lignite
    Mochizuki Yuuki; Watanabe Junpei; Tsubouchi Naoto, Proceedings of Conference on Coal Science, 54, 88, 89, 2017
    The removal of dibenzothiophene (DBT) in model hydrocarbon liquid fuel (MF) by Ni-loaded carbon (Ni/C) prepared from lignite has been studied with a flow-type fixed-bed reactor. The performance of Ni/C in the removal of 500 ppmw-S in MF depends on the amount of Ni loaded, and the highest ability is observed at 11 wt%-dry Ni under the conditions of reduction time of 0.5 h and desulfurization temperature of 200 °C. In addition, the time and temperature influence the breakthrough curves, and it is found that the optimum conditions for DBT removal from MF by Ni/C are reduction time of 1.0 h and desulfurization temperature of 200 °C., The Japan Institute of Energy, Japanese
  • Release and Retention of the Chlorine in Coal during Pyrolysis and Gasification Processes
    Javzandolgor Bud; Yuuki Mochizuki; Naoto Tsubouchi, Proceedings of the 17th Asian Pacific Confederation of Chemical Engineering Congress, USB, 2017
    English
  • Preparation of High-Strength Carbon/Carbon Composites from Tarry Materials and Low-Grade Cokes or Pyrolyzed Chars
    Jun Ma; Yuuki Mochizuki; Naoto Tsubouchi; Kazuya Uebo, Proceedings of the 1st International Conference on Energy and Material Efficiency and CO2 Reduction in the Steel Industry, USB, 2017
    English
  • Introduction of Research Group 北海道大学大学院工学研究院附属エネルギー・マテリアル融合領域研究センター エネルギー変換システム設計研究室—Center for Advanced Research of Energy and Materials, Faculty of Engineering, Hokkaido University
    坪内 直人; 望月 友貴, Journal of the Japan Institute of Energy = 日本エネルギー学会誌, 95, 3, 252, 254, Mar. 2016
    東京 : 日本エネルギー学会, Japanese
  • 乾留過程における石炭の流動性に及ぼす含酸素種の影響
    永沼遼; 望月友貴; 坪内直人; 上坊和弥, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2016, 2016
  • COGタールを用いる低強度コークスならびにチャーの高強度化
    馬駿; 望月友貴; 坪内直人; 上坊和弥, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2016, 2016
  • タールの気相蒸着により調製した炭素内装塊成鉱の強度と反応性
    望月友貴; 西尾恵; 坪内直人; 秋山友宏, 材料とプロセス(CD-ROM), 29, 1, 2016
  • No.1-15 配合炭の流動性に影響を及ぼす諸因子の検討
    望月友貴; 永沼遼; 坪内直人; 上坊和弥, 日本エネルギー学会石炭科学会議発表論文集(Web), 53, 2016
  • タールの気相蒸着法による低品位鉄鉱石からの高強度・高反応性炭素内装鉱の製造
    望月友貴; 坪内直人, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2016, 2016
  • 1-1-4 Enhancement of the strength of low grade cokes and pyrolyzed chars by carbonaceous materials derived from COG tar
    Mochizuki Yuuki; Tsubouchi Naoto; Uebo Kazuya, Proceedings of the Annual Conference of The Japan Institute of Energy, 25, 8, 9, 2016
    Carbon/carbon composites are prepared in the following manner : COG tar recovered from a commercial coke oven is first mixed with low grade cokes or pyrolyzed chars from lignite and sub-bituminous coals, and the resulting mixtures are then heated in He at 10 °C/min up to 500-900 °C with a flow-type fixed bed quartz reactor. The tensile strength of each composite prepared is investigated with a tensile and compression testing machine. The strength increases with increasing weight ratio of tar to coke or char up to about 2, and it becomes approximately 6.0 MPa at this ratio. The strength also increases with increasing pyrolysis temperature up to 800 °C, it reaches about 7.5 MPa, which is comparable to those (7.0 MPa) of high grade cokes used in commercial blast furnaces. On the basis of the results of pore size distribution measurements, it is likely that the increase in the strength takes place as a results of the infiltration of tar-derived carbonaceous materials into pores in low grade cokes and pyrolyzed chars., The Japan Institute of Energy, Japanese
  • No.1-15 Some Factors Influencing the Fluidity of Coal Blends
    Mochizuki Yuuki; Naganuma Ryo; Tsubouchi Naoto; Uebo Kazuya, Proceedings of Conference on Coal Science, 53, 30, 31, 2016
    The fluidity and evolution of gaseous O-containing species (CO, CO2 and H2O) during carbonization of caking coal, non- or slightly-caking coals and their coal blends at a heating rate of 3 °C/min have been studied with gieseler plastometer and a flow-type quartz-made fixed bed reactor to make clear the influence of particle size, blend ratio and oxygen species on coal fluidity. The gieseler maximum fluidity (MF) values decrease with increasing the amount of non- or slightly-caking coals added to caking coal. In addition, blend coals fluidity trends decrease with decreasing particles size of non- or slightly-caking coals in blend coals. When caking coal and non- or slightly-caking coals are absolutely carbonized, the MF value decreases almost linearly with increasing total amount of gaseous O-containing species evolved up to the initial softening temperature. Furthermore, H2O formation rates during carbonization of coal blends (250-425 μm-caking coal and 250-425 μm or 53-150 μm-non- or slightly-caking coal) are different from their calculation values based on the results of 250-425 μm-caking coal and 250-425 μm or 53-150 μm-non- or slightly-caking coal. It may be thus probable that H2O derived from non- or slightly-caking coal gives a negative effect on coal fluidity of coal blends., The Japan Institute of Energy, Japanese
  • Fluorine Release and Retention during Fixed Bed Combustion of Pyrolyzed Coal Chars (Division of Energy & Fuels)
    Naoto Tsubouchi; Yuuki Mochizuki; Naoyuki Iwabuchi; Yuuki Akama; Yasuo Ohtsuka, Abstracts of Papers of the American Chemical Society, 252, 2016, [Peer-reviewed]
    English
  • 研究グループ紹介「北海道大学大学院工学研究院エネルギー変換システム設計研究室」
    坪内直人; 望月友貴, 日本エネルギー学会誌, 95, 3, 252, 254, 2016, [Invited]
    Japanese, Introduction scientific journal
  • Production of High-Strength Carbon-Loaded Iron Ores from Tar and Limonite to Solve Energy, Resource and Environmental Problems in Commercial Ironmaking Processes
    Jun Ma; Yuuki Mochizuki; Naoto Tsubouchi, Proceedings of 2016 Annual Conference on Engineering and Applied Science, USB, 2016
    English
  • Reduction Rate and Crushing Strength of Composites Prepared from Cold-Bonded-Pellet and COG Tar
    Yusuke Mikawa; Yuuki Mochizuki; Naoto Tsubouchi, Proceedings of the 4th Frontier Chemistry Center International Symposium – Future Dreams in Chemical Science and Technology: Bridges to Global Innovations, 4, 4, 54, 2016
    English
  • Effect of Inherent Oxygen Species on the Fluidity of Coal during Carbonization
    Ryo Naganuma; Yuuki Mochizuki; Naoto Tsubouchi, Proceedings of the 4th Frontier Chemistry Center International Symposium – Future Dreams in Chemical Science and Technology: Bridges to Global Innovations, 4, 4, 55, 2016
    English
  • リモナイト鉱を用いる低炭化度炭の熱分解脱窒素
    三河佑輔; 望月友貴; 坪内直人, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2015, 2015
  • 褐鉄鉱を用いるコークス炉ガス中のピリジンの分解除去
    小川歩; 望月友貴; 坪内直人, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2014, 2015
  • タール含浸リモナイト由来の酸化鉄/炭素コンポジットの還元挙動
    三河佑輔; 望月友貴; 坪内直人, 材料とプロセス(CD-ROM), 28, 1, 2015
  • 褐炭の熱分解脱窒素と褐鉄鉱の還元のコ・プロセッシング
    三河佑輔; 望月友貴; 坪内直人, 化学工学会秋季大会研究発表講演要旨集(CD-ROM), 47th, 2015
  • COGタールとコールドボンドペレットから調製した炭素内装塊成鉱の圧潰強度と反応性
    望月友貴; 坪内直人; 秋山友宏, 材料とプロセス(CD-ROM), 28, 2, 2015
  • 微粉炭燃焼時のホウ素とセンレンの分配挙動
    望月友貴; 坪内直人; 菅原勝康, 材料とプロセス(CD-ROM), 28, 2, 2015
  • 褐炭の無害化脱窒素と褐鉄鉱の還元のコ・プロセッシング
    坪内直人; 望月友貴; 三河佑輔; 大塚康夫; 菊池毅光, 材料とプロセス(CD-ROM), 28, 2, 2015
  • 1-2-2 Influence of Oxygen Element on Coal Fluidity
    Naganuma Ryo; Kamiya Kyohei; Mochizuki Yuuki; Tsubouchi Naoto; Uebo Kazuya, Proceedings of the Annual Conference of The Japan Institute of Energy, 24, 10, 11, 2015
    The evolution of gaseous O-containing species (CO, CO_2 and H_2O) during carbonization of seven caking coals at a heating rate of 3℃/min has been studied with a quartz-made fixed bed reactor to make clear the influence of oxygen element on coal fluidity. The seven coals provide a Gieseler maximum fluidity (MF) value between 435 and 480℃, and the value depends strongly on the kind coal and ranges from 1.1 to 4.1 log(ddpm). Interestingly, the MF value decreases almost linearly with increasing total amount of (CO plus CO_2 plus H_2O) evolved up to the maximum fluidity temperature described above. Furthermore, the addition of O-containing compounds [phthalide (C_8H_6O_2), 2-naphthoic acid (C_<11>H_8O_2) and fluorescein (C_<20>H_<12>O_5)] to an Australian caking coal lowers the MF value considerably: the value decreases from the original 3.5 to 1.6-2.8 log(ddpm). It is thus probable that some of O-functional groups inherently-present in coal have a negative effect on coal fluidity., The Japan Institute of Energy, Japanese
  • No.1 Crushing strength and reduction reactivity of a carbon-containing pellet prepared by the chemical vapor infiltration method
    Mochizuki Yuuki; Tsubouchi Naoto; Akiyama Tomohiro, Proceedings of Conference on Coal Science, 52, 2, 3, 2015
    The crushing strength and reduction reactivity of a carbon-containing pellet prepared from a cold bonded pellet (CP) and COG tar have been examined with a tensile and compression machine and with a fixed-bed quartz reactor, respectively. The C-containing pellet is prepared by the chemical vapor infiltration (CVI) method under the conditions of tar pyrolysis temperature of 700℃ and CVI temperature of 350℃. When CP is heated up to 350℃, specific surface area (S_) and total pore volume (VEJB) increase from 20 to 60 m^2/g and from 0.06 to 0.075 cm^3/g, respectively, and the profile for pore size distribution gives a district peak around 2 nm. On the other hand, S_ and V_ values of CVI sample are as low as < 1 m^2/g and < 0.01 cm^3/g, respectively, and the peak observed around 2 nm disappears completely. The crushing strength of the sample reaches 10 daN, and the value is comparable to those of typical metallurgical cokes. The evolution of CO, CO_2 or H_2O starts at 300-400℃, and the maximal rates of these gases evolved are observed around 700-800℃ during heat treatment of the sample in He. The extent of redaction after 60 min holding at 1000℃ reaches > 85%, and metallic-Fe is formed above 800℃., The Japan Institute of Energy, Japanese
  • Fate of Boron and Selenium during Pulverized Coal Combustion
    Mochizuki Yuuki; Tsubouchi Naoto; Sugawara Katsuyasu, KAGAKU KOGAKU RONBUNSHU, 41, 5, 340, 349, 2015
    To investigate the fate of boron and selenium in low-rank coals during coal combustion, the effects of the dust collector and wet-flue gas desulfurization (FGD) conditions on the distributions of B and Se have been studied with a lab-scale pulverized combustor equipped with an FGD unit. Although the residence time of fly ash (FA) from the furnace inlet to the dust filter does not affect B distribution, the proportion of Se condensed onto the FA increases with increase in the residence time. Further, the proportion of B transferred into the bottom ash (BA) during the combustion of high ash-containing coal is greater than that during the combustion of middle-level ash-containing coal. On the other hand, the amounts of B condensed onto the FA are equal for the two types of coals examined. This result shows that the B distribution during coal combustion strongly depends on the coal type. No such coal type dependence is observed in the case of Se, because almost all of the Se in raw coal transfers into the gas phase during coal combustion, resulting in a very low amount of Se in BA. Examination of the effect of flue gas temperature on B distribution reveals that the gaseous B produced during coal combustion does not condense onto the FA as FA-B in the temperature range of 90–400°C. On the other hand, the amount of gaseous Se decreases with decrease in the flue gas temperature, and gaseous Se condenses onto the FA. We hypothesize that the ash composition in the FA and/or the sulfur content in the flue gas (Ca/S or Fe/S) may affect Se distribution, because the condensation behavior of Se onto the FA is quite different between for high-ash and high-sulfur-containing coals. In addition, it is found that over 90% of the gaseous Se can be removed at a flue gas temperature of 90°C. In the FGD test, almost all of the gaseous B or Se passing through the dust filter is trapped in the FGD solution, and the residual gaseous B or Se transfers into gypsum. The pH or temperature of the FGD solution does not affect B and Se distributions in the FGD unit. It is found that the gaseous B or Se formed during the combustion of pulverized coal can be removed via the flue gas and FGD unit., The Society of Chemical Engineers, Japan, Japanese
  • 研究活動総覧「北海道大学大学院工学研究院エネルギー変換システム設計研究室」
    坪内直人; 熊谷治夫; 望月友貴, 触媒技術の動向と展望, 2015, [Invited]
    Japanese
  • Utilization of Low-Valued Iron Ores as High Performance Materials to Develop a Novel Hot Gas Cleanup Method for an Integrated Gasification Combined Cycle
    Naoto Tsubouchi; Ayumu Ogawa; Yuuki Mochizuki, Proceedings of World Engineering Conference and Convention 2015, 131, 2015
    English
  • 1-2-2 Influence of Oxygen Element on Coal Fluidity
    Naganuma Ryo; Kamiya Kyohei; Mochizuki Yuuki; Tsubouchi Naoto; Uebo Kazuya, Proceedings of the Annual Conference of The Japan Institute of Energy, USB, 10, 11, 2015
    The evolution of gaseous O-containing species (CO, CO_2 and H_2O) during carbonization of seven caking coals at a heating rate of 3℃/min has been studied with a quartz-made fixed bed reactor to make clear the influence of oxygen element on coal fluidity. The seven coals provide a Gieseler maximum fluidity (MF) value between 435 and 480℃, and the value depends strongly on the kind coal and ranges from 1.1 to 4.1 log(ddpm). Interestingly, the MF value decreases almost linearly with increasing total amount of (CO plus CO_2 plus H_2O) evolved up to the maximum fluidity temperature described above. Furthermore, the addition of O-containing compounds [phthalide (C_8H_6O_2), 2-naphthoic acid (C_<11>H_8O_2) and fluorescein (C_<20>H_<12>O_5)] to an Australian caking coal lowers the MF value considerably: the value decreases from the original 3.5 to 1.6-2.8 log(ddpm). It is thus probable that some of O-functional groups inherently-present in coal have a negative effect on coal fluidity., The Japan Institute of Energy, English
  • Reduction Behavior and Crushing Strength of Carbon-Containing Composites Prepared from COG Tar and Cold Bonded Pellets
    Yuuki Mochizuki; Naoto Tsubouchi; Tomohiro Akiyama, Proceedings of the 13th China-Japan Symposium on Coal and C1 Chemistry, USB, 2015
    English
  • Evolution of Hydrogen Fluoride during Coal Pyrolysis and Subsequent Char Combustion (Division of Energy & Fuels)
    Naoto Tsubouchi; Yuuki Mochizuki; Naoyuki Iwabuchi; Yuuki Akama; Yasuo Ohtsuka, Abstracts of Papers of the American Chemical Society, 250, 2015, [Peer-reviewed]
    English
  • 低品位鉄鉱石のピリジン分解性能とキャラクタリゼーション
    小川歩; 望月友貴; 坪内直人, 化学系学協会北海道支部冬季研究発表会講演要旨集(CD-ROM), 2014, 2014
  • 褐鉄鉱とタールから製造した酸化鉄炭素複合体の還元挙動
    望月友貴; 三河佑輔; 坪内直人, 化学工学会秋季大会研究発表講演要旨集(CD-ROM), 46th, 2014
  • No.13 Effect of Indole Addition on Coke Strength
    Sakimoto Naoto; Takanohashi Toshimasa; Harada Yasuyuki; Fujimoto Hidekazu; Mochizuki Yuuki; Tsubouchi Naoto, Proceedings of Conference on Coal Science, 51, 26, 27, 2014
    Poly-aromatic compounds are known to improve the coke strength in coke-making. While, in the current work, we found that indole, a rather smaller aromatic compound with low boiling point, significantly improved the coke strength. The effect of indole on coke strength and its mechanism were investigated. The ultimate analysis and the coke yield of semi-cokes prepared at 600℃ showed that the nitrogen amount and the coke yield of semi-coke with indole were higher than those of semi-coke without indole. From these results it was indicated that indole had some influence before 600℃., The Japan Institute of Energy, Japanese
  • Adsorption Desulfurization of Organic Sulfur Compounds in Model Fuels by Ni-Loaded Carbon
    Mochizuki Yuuki; Tsubouchi Naoto; Sugawara Katsuyasu, KAGAKU KOGAKU RONBUNSHU, 40, 1, 56, 64, 2014
    Adsorption desulfurization of several organic sulfur compounds in model fuels (tetralin and n-dodecane) by metal (Co, Ni, Cu, Zn, Pb)-loaded carbons was studied with a batch-type Pyrex glass vessel or stainless autoclave at 25–350°C to develop a novel method of removing the sulfur present in coal extract. The results showed that nickel-loaded carbon (Ni/C) has the highest desulfurization performance, but the adsorption depends on the type of model fuel and the kind of sulfur compound. At ≤200°C, desulfurization was higher in n-dodecane than in tetralin and increased in the order of dibutyldisulfiden-dodecane. GC-MS analysis following the experiments with DBT revealed the presence of biphenyl, meaning that cleavage of the organic C–S bond in DBT proceeds on Ni/C., The Society of Chemical Engineers, Japan, Japanese
  • No.1 Catalytic Decomposition of Tar Nitrogen with Limonite : Effect of the Kind of Coexisting Gas on the Activity of Limonite Catalyst in Pyridine Decomposition
    Ogawa Ayumu; Mochizuki Yuuki; Tsubouchi Naoto, Proceedings of Conference on Coal Science, 51, 2, 3, 2014
    Catalytic performance of α-FeOOH-rich limonite in the decomposition of 100 ppmv pyridine (C_5H_5N) in different atmospheres under a large space velocity of 51000 h^<-1> has been investigated with a fixed bed quartz reactor to develop a novel hot gas cleanup method of removing the nitrogen in tar as N_2. The limonite catalyst achieves the almost complete decomposition of C_5H_5N in He at 500-750℃ and gives high N_2 yield of more than 80% at least for 10h at 500℃. The limonite is seriously deactivated by cofeeding syngas (20% CO/10% H_2) with C_5H_5N because of carbon deposition from CO. On the other hand, the addition of 10% CO_2 to the syngas improves the catalytic activity and restores the yield at 750℃ to ≥ 80% without carbon deposition., The Japan Institute of Energy, Japanese
  • No.30 Reduction rate and Crushing Strength of Iron Oxide-Carbon Composites Prepared from Limonite and Tar
    MOCHIZUKI Yuuki; Tsubouchi Naoto, Proceedings of Conference on Coal Science, 51, 60, 61, 2014
    Physical and chemical properties of iron oxide-carbon composites prepared from tar-impregnated limonite ores have been studied in detail. When as-received limonite is heated up to 500℃, the pore size distribution for the resulting sample shows a single peak at the pore diameter of about 2 nm, and total pore volume and specific surface area increase from the original 0.15 cm^3/g and 80 m^2/g to 0.25 cm^3/g and 110 m^2/g, respectively. With the composite produced, on the other hand, the 2 nm-peak described above disappears almost completely, and the volume and area become as low as <0.01 cm^3/g and 1 m^2/g, respectively. The evolution of CO, CO_2 or H_2O from composite samples during heat treatment starts at about 500℃, and the rate profile of each O-containing gas observed exhibits the main peak around 800℃ in every case. The rates of reduction of the composites are much larger than that for the physical mixture of the limonite preheated up to 500℃ and cake., The Japan Institute of Energy, Japanese
  • Fluorine Release and Retention during Coal Pyrolysis and Subsequent Char Combustion
    Naoto Tsubouchi; Yuuki Mochizuki, Proceedings of the 10th European Conference on Coal Research and Its Applications, CD-ROM, 2014
    English
  • No.13 Effect of Indole Addition on Coke Strength
    Sakimoto Naoto; Takanohashi Toshimasa; Harada Yasuyuki; Fujimoto Hidekazu; Mochizuki Yuuki; Tsubouchi Naoto, Proceedings of Conference on Coal Science, USB, 26, 27, 2014
    Poly-aromatic compounds are known to improve the coke strength in coke-making. While, in the current work, we found that indole, a rather smaller aromatic compound with low boiling point, significantly improved the coke strength. The effect of indole on coke strength and its mechanism were investigated. The ultimate analysis and the coke yield of semi-cokes prepared at 600℃ showed that the nitrogen amount and the coke yield of semi-coke with indole were higher than those of semi-coke without indole. From these results it was indicated that indole had some influence before 600℃., The Japan Institute of Energy, English
  • Decomposition of Ammonia and Pyridine with an Inexpensive Limonite Catalyst
    Yuuki Mochizuki; Ayumu Ogawa; Naoto Tsubouchi, Proceedings of the 4th International Symposium on Gasification and its Applications, USB, 2014
    English
  • アンモニアによるヘマタイトの還元および窒化挙動
    YASUDA NAOTO; NOMURA TAKAHIRO; CAHYONO ROCHIM B; MOCHIZUKI YUKI; TSUBOUCHI NAOTO; AKIYAMA TOMOHIRO, 化学工学会年会研究発表講演要旨集(CD-ROM), 78th, ROMBUNNO.P124, 17 Feb. 2013
    Japanese
  • 石炭乾留時のヘテロ元素の分布と流動性に及ぼす影響
    坪内直人; 望月友貴; 上坊和弥; 小野洋平, 材料とプロセス(CD-ROM), 26, 2, 2013
  • ピリジンの分解における低品位鉄鉱石の触媒性能
    小川歩; 望月友貴; 坪内直人, 化学工学会大会講演要旨集(CD-ROM), 2013, 2013
  • Ultimately-Efficient Utilization of Fossil Fuels as the Best Way to Reduce CO2 Emissions
    Naoto Tsubouchi; Haruo Kumagai; Yuuki Mochizuki, Proceedings of the 1st Frontier Chemistry Center International Symposium – Next Generation of Molecular Chemistry, 1, 1, 33, 2013
    English
  • Sulfur Distribution during Coal Carbonization and Influence of Addition of S-Containing Compounds on Gieseler Fluidity
    Yuuki Mochizuki; Yohei Ono; Kazuya Uebo; Naoto Tsubouchi, Proceedings of the 12th Japan-China Symposium on Coal and C1 Chemistry, USB, 2013
    English
  • Catalytic Performance of Limonite in the Decomposition of Pyridine at High Temperatures
    Ayumu Ogawa; Yuuki Mochizuki; Naoto Tsubouchi, Proceedings of International Conference on Coal Science and Technology 2013, CD-ROM, 2013
    English
  • Catalytic Decomposition of Pyridine with Iron Nanoparticles Produced from Limonite
    Yuuki Mochizuki; Ayumu Ogawa; Haruo Kumagai; Naoto Tsubouchi, Proceedings of the 9th World Congress of Chemical Engineering incorporating with the 15th Asian Pacific Confederation of Chemical Engineering Congress, USB, 2013
    English
  • 石炭中の窒素と硫黄のファンクショナリティと乾留時の行方
    望月友貴; 小野洋平; 上坊和弥; 坪内直人, 化学系学協会北海道支部冬季研究発表会講演要旨集, 2012, 2012
  • 石炭の軟化溶融性能に及ぼす窒素と硫黄の影響
    望月友貴; 坪内直人; 小野洋平; 上坊和弥, 化学工学会年会研究発表講演要旨集(CD-ROM), 77th, 2012
  • 石炭の軟化溶融性能に及ぼす窒素と硫黄の影響:熱分解時のガス状含窒素・含硫黄化合物の発生量と最高流動度の関係
    坪内直人; 望月友貴; 上坊和弥; 小野洋平, 材料とプロセス(CD-ROM), 25, 1, 2012
  • No.68 Effects of HPC Addition on the Thermoplasticity of Coking Coals (2)
    KUMAGAI Haruo; MOCHIZUKI Yuuki; TSUBOUCHI Naoto; OKUYAMA Noriyuki; SHISHIDO Takahiro; SAKAI Koji; HAMAGUCHI Maki; KOMATSU Nobuyuki, Proceedings of Conference on Coal Science, 49, 132, 133, 2012
    Compared with the conventional techniques, high temperature proton NMR relaxation measurement enable to monitor the actual changes in progress of thermal transformation. The quantitative change of specimens can be evaluated by recording the hydrogen content of residual specimens, and qualitative variation of the specimen is able to detect as a change of the relaxation characteristics of signal. In this study, thermoplastic properties of coal, coal blend and coal blend with "High Performance Coking additive, HPC" are investigated by means of proton NMR relaxation measurement from the viewpoints of molecular mobility. The solid echo pulse sequence was employed to generate ^1H-NMR transverse relaxation signals. The echo signals obtained during heat treatment under a flow of nitrogen at a heating rate of 3K/min were deconvoluted into a set of one Gaussian and two Exponential decay components which represent the immobile, intermediate and mobile component, respectively. It is demonstrated that ^1H-NMR relaxation measurement is the appropriate dynamic measurement technique to characterize the thermoplastic properties of coal. Thermoplastic phenomenon of coal is evaluated both qualitatively and quantitatively by the variation of IHm and T2Hm. HPC is effective additive to improve the thermoplasticity of coal blend. The improvement of the thermoplasitic phenomenon of coal blend with HPC is attributed to the quantitative and qualitative change of Hm., The Japan Institute of Energy, Japanese
  • No.28 Fate of the nitrogen and sulfur in coal during pyrolysis and the effects of these heteroatoms on coal fluidity
    Mochizuki Yuuki; Kumagai Haruo; Tsubouchi Naoto; Ono Youhei; Uebo Kazuya, Proceedings of Conference on Coal Science, 49, 56, 57, 2012
    The fate of the nitrogen and sulfur present in seven caking coals during pyrolysis has been studied with a flow-type fixed-bed quartz reactor to examine the effects of these heteroatoms on coal fluidity. The Gieseler maximum fluidity (MF) appears around 450℃ with all coals. The MF values range from 1.1 to 4.1 log(ddpm) and depend strongly on the type of coal. The evolution of HCN, NH_3, H_2S and tar-S starts after 350℃, whereas char-N, organic-S and FeS_2 decrease beyond 350℃. FeS_2 can readily be transformed to FeS and H_2S at 350-650℃. The evolution amounts of gaseous N- and S-containing species depend on the kind of coal. The MF value tends to increase with increasing total amount of HCN, NH_3 or H_2S evolved up to 450℃. Although the addition of 1 wt% aliphatic-N, inorganic-N or S-containing compounds to coal decreases coal fluidity, but polycyclic aromatic compounds increase the fluidity., The Japan Institute of Energy, Japanese
  • Functional Forms of Nitrogen and Sulfur in Coals and Fate of Heteroatoms during Coal Carbonization
    Tsubouchi Naoto; Mochizuki Yuuki; Ono Yohei; Uebo Kazuya, Tetsu-to-Hagane, 98, 5, 161, 169, 2012
    The functionalities of the nitrogen (coal-N) and sulfur (coal-S) present in three caking coals with carbon contents of 76-81 wt%-dry and the fate of these heteroatoms during coal carbonization have mainly been studied by the X-ray photoelectron spectroscopy (XPS) and with a fixed bed quartz reactor, respectively. The XPS measurements exhibit that about 80-90 % of the coal-N exists as pyrrolic-N and pyridinic-N, and the rest can be assigned to quaternary-N (pyridinic-N associated with the hydroxyl groups from phenols or carboxylic acids), whereas the coal-S consists of thiophenic-S, alkyl-S and FeS2, and the proportion of the former is as high as 60-70 %. When the coal sample is carbonized in He at a heating rate of 3°C/min, yield of N-containing species observed at 1000°C increases in the order of HCN ≤ tar-N < NH3 < N2 < oil-N < coke-N, regardless of the type of coal, and the latter two are present predominantly as NH4+ and in polynuclear aromatic structures, respectively. On the other hand, yield of S-containing species at 1000°C increases in the order of COS < CS2 < tar-S < oil-S < H2S < coke-S with all coals, and more than 95 % of the coke-S can be regarded as thiophenic-S. These tendencies are also observed with physical mixtures of each coal investigated. Possible mechanisms for the formation of gaseous N- or S-containing compounds in the carbonization process are discussed on the basis of the results of some thermodynamic calculations., The Iron and Steel Institute of Japan, Japanese
  • 塩化揮発法によるDy含有NdFeB磁石からの希土類元素の選択的分離
    望月友貴; 菅原勝康, 化学工学会大会講演要旨集(CD-ROM), 2011, 2011
  • Recovery of Rare Metals from Optical Glass by Chlorination
    Mochizuki Yuuki; Shoji Takaaki; Kato Takahiro; Murakami Kenji; Sugawara Katsuyasu, KAGAKU KOGAKU RONBUNSHU, 37, 5, 454, 459, 2011
    To obtain fundamental data for developing an efficient recovery process of rare metals from grinding powder and cutting fragment of optical glass, the release of Nb, Ta, La, Gd and coexisting elements (Ti, Zr and Zn) was investigated under the conditions of a heating rate of 30°C/min and terminal temperatures from 200 to 1000°C in a Cl2 gas stream. The release of Zn, Nb, Ti and La drastically increased above 700°C and attained almost 100% at 1000°C, while that of Zr attained to 10% above 800°C. Carbon addition accelerated the volatilization, and the release of elements other than La and Gd reached 100% by 1000°C. The release of La and Gd was only 2–3% in the temperature from 800 to 1000°C. When the samples were heated at 700°C for 120 min, Ta and Nb were selectively volatilized from solid phase without the release of La and Gd.
    Based on the experimental results, a three-step heat treatment process at 500, 700 and 1000°C in a Cl2 gas stream with carbon addition was proposed to recover the rare metals selectively from the optical glass., The Society of Chemical Engineers, Japan, Japanese
  • Recovery of Rare Earth from Nd-Fe-B Magnets by Chlorination
    Mochizuki Yuuki; Mori Hirosuke; Sugawara Katsuyasu, KAGAKU KOGAKU RONBUNSHU, 37, 1, 70, 77, 2011
    In order to obtain fundamental data for developing an efficient recovery process of rare earth elements from Nd–Fe–B magnets, the release behavior of Nd, Pr and elements was investigated under the conditions of heating rate of 30°C/min and terminal temperatures from 100 to 1000°C in a Cl2 gas stream. Fe and B volatilizedin the low temperature region,while Nd and Pr were concentratedin the solid phase by the chlorination. Nd–Fe–B samples werepre-oxidized by heating at 500°C in air to prevent spontaneous combustion of the fine magnet powder. While Fe and Co in the oxidized magnet were volatilized during the chlorination, the rare earth elements and B mostly remained in the solid phase as water-insoluble forms. When carbon and SiC powders were added to the oxidized sample, Fe, Co and B were completely volatilized at 1000°C by carbochlorination. Nd and Pr were concentrated in the residue of the oxidized magnet sample. It was also found that Nd and Pr could be selectively recovered by leaching with water from the residue, because these elements formed chlorides by the carbochlorination., The Society of Chemical Engineers, Japan, Japanese
  • 希土類磁石からの希少金属の分離回収
    森広介; 望月友貴; 菅原勝康, 化学工学会関東支部大会研究発表講演要旨集, 2010, 2010
  • 金属二次資源からの亜鉛の揮発分離
    加藤貴宏; 望月友貴; 村上賢治; 菅原勝康, 化学工学会関東支部大会研究発表講演要旨集, 2010, 2010
  • 塩化揮発による希少元素の分離
    菅原 勝康; 庄司 剛章; 望月 友貴; 加藤 貴宏; 村上 賢治, 化学工学会 研究発表講演要旨集, 2010, 300, 300, 2010
    公益社団法人 化学工学会, Japanese
  • Dynamic behavior of arsenic and selenium during pyrolysis and gasification
    MOCHIZUKI Yuuki; SUGAWARA Katsuyasu, Proceedings of Conference on Coal Science, 47, 34, 35, 2010
    Arsenic(As)and selenium(Se)in coal are classified into toxic and high volatile element groups during combustion and gasification. As part of a series of studies carried out on coal cleaning to prevent environmental problems and to promote efficient coal utilization processes, the release behaviors of As and Se during pyrolysis and gasification were investigated. As and Se in coal and char were classified into three groups by sequential leaching method with HCl, HNO_3 and H_2SO_4. In pyrolysis, the release extent of As gradually increased with the increase of temperature, while the release extent of Se drastically increased above 800°C. The release extents of Se and As for coals in pyrolysis below 1200°C were correlated with ash contents. A part of HCl and HNO_3 soluble As in raw coal changed into H_2SO_4 soluble, and HCl and HNO_3 soluble Se in coal released during pyrolysis., The Japan Institute of Energy, Japanese
  • Effects of Pretreatment and Additives on Boron Release during Heat Treatment of Coal
    MOCHIZUKI Yuuki; SUGAWARA Katsuyasu; ENDA Yukio, Proceedings of Conference on Coal Science, 46, 142, 143, 2009
    Boron is one of the most toxic and high volatile elements present in coal. As part of a series of studies carried out on coal cleaning to prevent environmental problems and to promote efficient coal utilization processes, the removal of boron by leaching with water and acetic acid has been investigated. The effects of the addition of ash components, that is, SiO_2, Al_2O_3 and CaO in the control of boron release during pyrolysis and gasification were investigated. Here, 20-60% of boron in coal was removed by leaching the coal with water and acetic acid. Boron leached by water and acetic acid was related to volatiles released from coal in pryrolysis below 1173K. The addition of ash components such as SiO_2 and Al_2O_3 was found to be effective in suppressing the release of boron during pyrolysis at temperatures below and above 1173K, respectively. The addition of CaO to coal was effective in suppressing the release of boron during gasification at 1173K., The Japan Institute of Energy, Japanese
  • サルファーフリー・クリーン燃料製造のための新規脱硫法の開発
    望月友貴; 菅原勝康, 化学工学会関東支部大会研究発表講演要旨集, 2008, 2008
  • Selective removal of organic sulfur in hydrocarbon by metal loaded carbonaceous adsorbent
    MOCHIZUKI Yuuki; SUGAWARA Katsuyasu, Proceedings of Conference on Coal Science, 45, 16, 17, 2008
    To develop an efficient cleaning process of hydrocarbon resources, metal loaded carbon was used for removal of organic sulfur from coal extract liquid. The coal extract liquid was prepared from Illinois No. 6 with tetralin under pressurized conditions. The desulfurization extent of organic sulfur in coal extract increased with increasing of heating temperature and holding time by using Ni loaded carbon. Organic sulfur of 90-96% could be removed from the coal extract liquid heated at 350℃ for 4-6h due to adsorption by the nickel loaded carbon., The Japan Institute of Energy, Japanese
  • イオン性液体による石炭抽出物中有機硫黄の分離
    望月 友貴; 菅原 勝康, 化学工学会 研究発表講演要旨集, 2008f, 210, 210, 2008
    公益社団法人 化学工学会, Japanese
  • 35 Release Behavior and Control of Boron during Pyrolysis and Gasification of Coal
    MOCHIZUKI Yuuki; SUGAWARA Katsuyasu; Enda Yukio, Proceedings of Conference on Coal Science, 44, 70, 71, 2007
    In a series of studies on coal cleaning, the present study was carried out to clarify the release behavior of boron during pyrolysis and gasification and to find an optimum condition for controlled release with some additives. Dependency of boron release on temperature was characterized by two parts, low ( < 1173 K ) and high ( > 1173 K ) temperature range in pyrolysis of coals. Appreciable release of boron was not observed during gasification except for Ebenezer coal. The addition of SiO_2 and CaO was very effective for suppressing the boron release at the pyrolysis below 1173 K and gasification. Al_2O_3 was also effective for the release control of boron in the pyrolysis at 1473 K., The Japan Institute of Energy, Japanese
  • 1 Removal of Organic Surfur from Coal Extract
    MOCHIZUKI Yuuki; SUGAWARA Katsuyasu, Proceedings of Conference on Coal Science, 44, 2, 3, 2007
    To develop an efficient cleaning process of hydrocarbon resources, an ionic liquid 1,3-dimethyl imidazolium methyl sulfate was used for removal of organic sulfur from coal extract. The coal extract was prepared from Illinois No.6 with tetralin under pressurized conditions. The desulfurization extent of organic sulfur increased linearly with increasing of mass ratio of ionic liquid to coal extract. Organic sulfur of 40 % could be removed from the coal extract at the ratio of ionic liquid to coal extract of 5.0., The Japan Institute of Energy, Japanese
  • 13. Selective Separation of Thiophene in Hydrocarbon by using Ionic liquids
    MOCHIZUKI Yuuki; SUGAWARA Katsuyasu; SUGAWARA Takuo, Proceedings of Conference on Coal Science, 43, 27, 28, 2006
    To develop an efficient cleaning process of hydrocarbon resources, ionic liquids were used for selective removal of thiophene from a model fuel. The desulfurization extent of dibenzothiophene increases linearly with increasing of total carbon number of alkyl group with ionic liquids. 1-Butyl-3-ethyl-imidazolium ethyl sulfate ( BEIMEtSO_4) showed the highest removal extent of thiophene in six kinds of ionic liquid at room temperature., The Japan Institute of Energy, Japanese
  • 7-19. Selective Separation of Organic Sulfur in Hydrocarbon by Using Metal Compounds
    MOCHIZUKI Yuuki; SUGAWARA Katsuyasu; SUGARAWA Takuo, Proceedings of the Annual Conference of The Japan Institute of Energy, 15, 393, 394, 2006
    The Japan Institute of Energy, Japanese
  • 31. Selective Separation of Organic Sulfur in Carbon Resources
    MOCHIDUKI Yuuki; SUGAWARA Katsuyasu, Proceedings of Conference on Coal Science, 42, 65, 66, 2005
    To develop an efficient cleaning process of carbon resources, lead oxide and ionic liquid were used for selective removal of organic sulfur. Lead oxide powder adsorbs thiol selectively as s form of Pb(SR)_2 and a desulfurization extent of 98 % was obtained at a room temperature. The ionic liquid BMIMMeSO_4 shows selective extraction of thiophene. The desulfurization extent of thiophene increases linearly with the number of extraction cycle. Thiol and thiophene were extracted successfully from a mixed solution with lead oxide and ionic liquid., The Japan Institute of Energy, Japanese
■ Books and other publications
■ Lectures, oral presentations, etc.
  • タール中窒素のモデル化合物の分解に対するリモナイトの触媒性能
    小川歩; 望月友貴; 坪内直人
    第 50 回石炭科学会議, 2013
  • 石炭乾留時のヘテロ元素の分布と流動性に及ぼす影響
    坪内直人; 望月友貴; 上坊和弥; 小野洋平
    日本鉄鋼協会第 166 回秋季講演大会, 2013
  • ピリジンの分解における低品位鉄鉱石の触媒性能
    小川歩; 望月友貴; 坪内直人
    化学工学会 3 支部合同盛岡大会, 2013
  • アンモニアによるヘマタイトの還元および窒化挙動
    安田尚人; 能村貴宏; Cahyono Rochim Bakti; 望月友貴; 坪内直人; 秋山友宏
    化学工学会第 78 年会, 2013
  • 低品位鉄鉱石を触媒原料とするピリジンの高温分解
    小川歩、望月友貴、坪内直人
    化学系学協会北海道支部 冬季研究発表会, 2013
  • 褐鉄鉱を用いるピリジンの高温接触分解
    小川歩; 望月友貴; 坪内直人
    第 2 回エネルギー・マテリアル融合領域シンポジウム, 2013
  • 粘結材添加がコークス原料炭の軟化溶融挙動に及ぼす影響(2)
    熊谷治夫; 望月友貴; 坪内直人; 奥山憲幸; 宍戸貴洋; 堺康爾; 濱口眞基; 小松信行
    第 49 回石炭科学会, 2012
  • 石炭の熱分解過程における窒素と硫黄の行方ならびに軟化溶融性能に及ぼす影響
    望月友貴、熊谷治夫、坪内直人、小野洋平、上坊和弥
    第 49 回石炭科学会議, 2012
  • 石炭の軟化溶融性能に及ぼす窒素と硫黄の影響：熱分解時のガス状含窒素・含硫黄化合物の発生量と最高流動度の関係
    坪内直人; 望月友貴; 上坊和弥; 小野洋平
    日本鉄鋼協会第 163 回春季講演大会, 2012
  • 石炭の軟化溶融性能に及ぼす窒素と硫黄の影響
    望月友貴; 小野洋平; 上坊和弥; 坪内直人
    化学工学会第 77 年会, 2012
  • 石炭中の窒素と硫黄のファンクショナリティと乾留時の行方
    望月友貴; 小野洋平; 上坊和弥; 坪内直人
    化学系学協会北海道支部冬季研究発表会, 2012
  • 石炭の熱分解及びガス化におけるヒ素及びセレンの動的挙動
    望月友貴; 菅原勝康
    第 47 回石炭科学会議, 2010
  • 希土類磁石からの希少元素の分離回収
    森広介、望月友貴、菅原勝康
    化学工学会宇都宮大会, 2010
  • 石炭熱処理時におけるホウ素の放出に及ぼす前処理と添加剤の影響
    望月友貴; 菅原勝康; 遠田幸生
    46 回石炭科学会議, 2009
  • 金属坦持炭素吸着剤による炭化水素中有機硫黄の選択的分離
    望月友貴; 菅原勝康
    第 45 回石炭科学会議, 2008
  • イオン性液体による石炭抽出物中有機硫黄の分離
    望月友貴、菅原勝康
    化学工学会, 2008
  • 石炭の熱分解及びガス化におけるホウ素の動的挙動ならびに放出抑制
    望月友貴; 菅原勝康; 遠田幸生
    第 44 回石炭科学会議, 2007
  • 石炭抽出物中有機硫黄の分離
    望月友貴; 菅原勝康
    第 44 回石炭科学会議, 2007
  • イオン性液体による炭化水素中チオフェンの選択的分離
    望月友貴、菅原勝康、菅原拓男
    第 43 回石炭科学会議, 2006
  • 金属化合物による炭化水素中有機硫黄の選択的分離
    望月友貴、菅原勝康、菅原拓男
    日本エネルギー学会大会, 2006
  • 炭素資源中有機硫黄の選択的分離
    望月友貴; 菅原勝康
    第 42 回石炭科学会議, 2005
■ Affiliated academic society
  • 化学工学会
  • 廃棄物資源循環学会
  • 日本鉄鋼協会
  • 日本エネルギー学会
■ Research Themes
  • Development of co-production method of key industrial raw materials and heavy metal adsorbents from biomass waste
    Grants-in-Aid for Scientific Research
    01 Apr. 2021 - 31 Mar. 2024
    望月 友貴
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 21H03638
  • Recovery of valuable elements from lithium-ion batteries
    Grants-in-Aid for Scientific Research
    09 Jul. 2021 - 31 Mar. 2023
    望月 友貴
    Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Research (Exploratory), Hokkaido University, 21K19856
  • Upgrading of low-grade carbonaceous resources by pore control
    Grants-in-Aid for Scientific Research
    01 Apr. 2017 - 31 Mar. 2019
    Mochizuki Yuuki
    The carbon/carbon composite (CC) was first prepared from the porous-char and tar produced from pyrolysis of woody biomass by tar impregnation and vapor deposition methods, and then the caking properties of prepared-CC were investigated to develop the upgrading and efficiency utilization methods of biomass. The both methods could prepare CCs that were filled the carbonaceous materials derived from tar in pores and on surface in the pyrolyzed char. The yield of CC significantly exceeded the original yield of pyrolyzed char, and the original char prepared from the woody biomass was able to upgrade. From the result of investigation of the indirect tensile strength of coke prepared from the blending of the CCs and caking-coal, prepared CCs by both methods was able to use as substitute of slightly-caking coal or reduce the amount of caking-coal used. It may thus be possible that the prepared CCs by the present methods are able to utilize for cokemaking process.
    Japan Society for the Promotion of Science, Grant-in-Aid for Young Scientists (B), Hokkaido University, 17K12846
  • Reactions of Hydrogen Halides with Carbonaceous Materials during High Temperature Processes and the Formation of Halogenated Organic Compounds
    Grants-in-Aid for Scientific Research
    01 Apr. 2014 - 31 Mar. 2017
    TSUBOUCHI Naoto; MOCHIZUKI YUUKI
    To elucidate secondary reactions of HCl during high-temperature industrial processes, a model carbon prepared from phenol resin is first O2-activated at 500℃ and then impregnated with CH3COOK, (CH3COO)2CaH2O, (CH3COO)2Cu or (CH3COO)2Zn2H2O. When the sample is exposed to a stream of 100 ppm HCl/N2 at 500℃, HCl can readily react with all carbon samples to produce surface chlorine species, and the extent of the reaction increases by metal doping. The X-ray photoelectron spectroscopy (XPS) measurements of the HCl-treated samples exhibit the distinct Cl 2p spectra, which can be identified to organic chlorine with pure carbon and to organic and inorganic chlorine with the Ca-, Cu- and Zn-doped carbons. These observations suggest that HCl evolved during high-temperature industrial processes may react secondarily with carbon active sites and mineral components (for example, Ca, Cu and Zn) in carbonaceous materials (for example, unburned carbon) to form organic and inorganic chlorine.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 26281035
  • Selective recovery of rare metals from optical glass by chlorination
    Grants-in-Aid for Scientific Research
    2010 - 2012
    SUGAWARA Katsuyasu; MOCHIZUKI Yuuki
    To develop an efficient recovery process of rare metals from ground powder and fragment of optical glass, the release behavior of La, Nb, Ta, Gd and coexisting elements (Ti, Zr, Zn) was investigated under the conditions of terminal temperatures from 200 to 1000℃ in a Cl_2 gas stream. A three-step heat treatment process in a Cl_2 gas stream with carbon addition was proposed to recover the rare metals selectively from the optical glass.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Akita University, 22605002
  • Development of advanced desulfurization process for sulfur-free clean fuel production
    Grants-in-Aid for Scientific Research
    2007 - 2008
    SUGAWARA Katsuyasu; NONAKA Risehiro; MOCHIZUKI Yuuki
    常温・常圧下で水素や脱硫触媒を一切用いずに、サルファーフリーのクリーン燃料を製造するプロセスの開発を目的とした研究を行った。燃料油中のチオール類の分離には、酸化鉛が極めて優れた選択吸着性を示すことや、水素化脱硫が困難とされているジベンゾチオフェンについては、イオン性液体のブチルメチルイミダゾリウムメチルサルフェートによる抽出が有効であることを明らかにした。
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Akita University, 19560770
■ Industrial Property Rights
  • コークス製造用の粘結材の製造方法及びコークスの製造方法
    Patent right, 坪内直人; 望月友貴; 窪田征弘; 上坊和弥
    特願2025-062111, 03 Apr. 2025
  • コークス製造用の粘結材の製造方法及びコークスの製造方法
    Patent right, 坪内直人; 望月友貴; 窪田征弘; 上坊和弥
    特願2025-062110, 03 Apr. 2025
  • コークスの製造方法
    Patent right, 坪内直人; 望月友貴; 窪田征弘; 上坊和弥
    特願2025-062109, 03 Apr. 2025
  • 鉄鉱石中の脈石及びリンの除去方法、及び鉄の製造方法
    Patent right, 樋口謙一; 坪内直人; 望月友貴
    特願2022-132556, 23 Aug. 2022
    特開2024-30025, 07 Mar. 2024
  • リンを回収する方法、及び鉄原子を除去する方法
    Patent right, 坪内直人 , 望月友貴
    特願2023-005999, 18 Jan. 2023
    特開2023-145335, 11 Oct. 2023
  • 製鋼スラグを処理する方法、及び、製鋼スラグからリンを回収する方法
    Patent right, 坪内直人; 望月友貴
    特願2022-052137, 28 Mar. 2023
  • Method of Separating and Recovering Metal Elements
    Patent right, M.Kiyosawa; K.Nochi; N.Kobayashi; K.Iida; K.Sugawara; Y.Mochizuki
    US 8,920,535, 30 Dec. 2014
  • 金属元素の分離回収方法
    Patent right, 清澤正志; 野地勝己; 小林敬古; 飯田耕三; 菅原勝康; 望月友貴
    2013
    特開2013-231217
  • 炭素内装鉱の製造方法
    Patent right, 村井亮太; 石渡夏生; 殿村重彰; 菊池直樹; 富田幸雄; 富崎真; 秋山友宏; 坪内直人; 望月友貴
    特願2016-084092
    特許6414903
  • 被処理ガス中の有機窒素化合物の分解方法
    Patent right, 上坊和弥, 坪内直人, 望月友貴, 小川歩
    特願2013-157078
    特開2015-024400
    特許6070462
  • 塩化揮発法による希土類元素の分離方法及び分離システム
    Patent right, 菅原勝康，望月友貴，森広介
    特願2010-182368
    特開2012-41588

Research Profiles

■ Research Profiles