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OKUMURA Yukihiko

  • Faculty of Engineering and Design
  • Department of Engineering and Design
  • Graduate School of Science for Creative Emergence
  • Division of Science for Creative Emergence
  • Professor
Last Updated :2026/06/24

Researcher Information

Degree

  • PhD.（Toyohashi University of Technology）

J-Global ID

Research Interests

  • 熱工学   Thermal Engineering   

Research Areas

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Fluid engineering
  • Environmental science/Agricultural science / Environmental load reduction/restoration technology
  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Thermal engineering

Academic & Professional Experience

  • 2018/04 - Today  Kagawa UniversityFaculty of Engineering and Design (Division of Intelligent Mechanical Systems Engineering)教授
  • 2007/02 - 2018/03  National Insitute of Technology, Maizuru collegeProfessor
  • 2008/10 - 2009/08  Utah UniversityInstitute for Clean and Secure Energy (Department of Chemical Engineering)
  • 2000 - 2001  東京工業大学（研究員）

Education

  • 1991/04 - 1994/03  国立豊橋技術科学大学大学院  工学研究科  総合エネルギー工学専攻（博士課程）修了
  •        - 1994  Toyohashi University of Technology  Graduate School, Division of Engineering
  • 1989/04 - 1991/03  国立豊橋技術科学大学大学院  工学研究科  エネルギー工学専攻（修士課程）修了
  •        - 1989/03  国立豊橋技術科学大学  工学部  エネルギー工学課程 (現 機械システム工学課程)卒業

Association Memberships

  • 日本エネルギー学会   日本伝熱学会   日本燃焼学会   化学工学会   日本機械学会   

Published Papers

Books etc

  • カーボンニュートラル燃料最新動向，－ 水素・アンモニア・e-fuel・バイオ燃料 －
    奥村幸彦 (Joint work第３章担当)情報機構 2022/08 9784865022377

Conference Activities & Talks

  • 蒸気過多の燃焼条件下における円管周りの伝熱特性 ―伝熱特性に及ぼす排ガス温度の影響―
    藤井 睦月; 高木 康成; 奥村 幸彦; 神原 信志
    熱工学コンファレンス 2024講演論文集  2024/10
  • 粗悪なバイオシンガス燃料の安定燃焼技術の構築  [Not invited]
    奥村 幸彦,竹原 裕貴,楠 直也
    熱工学コンファレンス 2023  2023/10  神戸大学  日本機械学会
  • Combustion characteristic of NH3/H2/N2 premixed flame  [Not invited]
    Yukihiko Okumura, Tomohiro Tsubota, Kenta Kikuchi, Noritoshi Yagawa, Tomohiro Matsunami
    33rd International Symposium on Transport Phenomena (ISTP2023)  2023/09  Kumamoto  Pacific Center of Thermal Fluids Engineering
  • 冬季における大型観光バスの換気設計とウイルスの高効率排除  [Not invited]
    牧平祥希,奥村幸彦
    第35回中国四国伝熱セミナー  2023/08  高松市レクザムホール  日本伝熱学会中四国支部
  • H₂/NH₃燃排雰囲気下における伝熱交換機の高効率化  [Not invited]
    高木康成,香川暉羅,奥村幸彦
    第35回中国四国伝熱セミナー  2023/08  高松市レクザムホール  日本伝熱学会中四国支部
  • H₂/NH₃燃焼雰囲気における円管周りの基礎伝熱特性  [Not invited]
    高木康成,香川暉羅,奥村幸彦
    第３２回日本エネルギー学会大会  2023/08  福岡，福岡大学  日本エネルギー学会
  • Flame structure and reaction analysis for ammonia turbulent burner  [Invited]
    Yukihik Okumura
    7th International Workshop on Heat-Mass Transfer Advances for Energy Conservation and Pollution Control (IWHT2023)  2023/08  Tokushima  International Organizing Committees of IWHT 2023
  • ポストコロナにおける大型観光バスの換気設計とウイルスの高効率排除  [Not invited]
    牧平祥希,奥村幸彦
    第33回環境工学総合シンポジウム2023  2023/07  島根県立産業交流会館（くにびきメッセ）松江市  日本機械学会
  • 旋回‐絞り構造バーナーによるバイオシンガスの高負荷燃焼機構  [Not invited]
    楠 直也 、竹原 裕貴 、奥村 幸彦
    第60回日本伝熱シンポジウム  2023/05  福岡国際会議場  日本伝熱学会
  • 水素保炎型アンモニア拡散バーナーの火炎構造と反応解析  [Not invited]
    奥村 幸彦, 坪田 知大,松田 直也,堀 司,赤松 史光
    第61回 燃焼シンポジウム  2023/11  秋田市アトリオン  日本燃焼学会
  • NH3/H2/N2 予混合火炎の燃焼特性  [Not invited]
    坪田知大,菊池賢太,矢川憲利,松浪智広,奥村幸彦
    第60回 燃焼シンポジウム講演論文集  2022/11  東京都・墨田区  日本燃焼学会
  • Detailed Gasification Process of Biomass-Derived Char and Gasification Mechanism  [Not invited]
    Hossain Md. Zakir, Naoki Matsu-ura, Yukihiko Okumura,
    2022 AIChE Annual Meeting  2022/11  (Phoenix Convention Center  American Institute of Chemical Engineers
  • バイオシンガスを燃料とする火花点火エンジンの排出ガス特性  [Not invited]
    岸直弥,奥村幸彦
    熱工学コンファレンス 2022  2022/10  東京大学  日本機械学会
  • 旋回‐絞り構造バーナーによるバイオシンガスの高負荷燃焼  [Not invited]
    楠直也,竹原裕貴,奥村幸彦
    第３１回日本エネルギー学会大会講演要旨集  2022/08  東京，大田区産業プラザPiO  日本エネルギー学会
  • 安心・安全を目指した大型観光バスの換気設計とウイルスの高効率排除  [Not invited]
    牧平祥希,奥村幸彦
    第32回環境工学総合シンポジウム2022  2022/07  高松市，レクザムホール  日本機械学会
  • 難燃性バイオシンガスの高負荷燃焼  [Not invited]
    竹原裕貴,楠直也,奥村幸彦
    第59回日本伝熱シンポジウム講演論文集  2022/05  岐阜市，長良川国際会議場  日本伝熱学会
  • Reaction Analysis of nitrogen oxide for ammonia turbulent burner with hydrogen flame stabilizer  [Not invited]
    Yukihiko Okumura, Tsukasa Hori, Fumiteru Akamatsu, Takahiro Kitano, Tomohiro Tsubota, Naoya Matsuda
    32nd International Symposium on Transport Phenomena (ISTP2022)  2022/03  Tianjin  Pacific Center of Thermal Fluids Engineering (PCTFE)
  • ガスエンジンの排ガス特性に及ぼすシンガス（CO/H2）比の影響
    岸 直弥; 星加 浩輔; 奥村 幸彦
    第 58 回日本伝熱シンポジウム  2021
  • バイオシンガス燃料使用の噴流拡散火炎に対するコンサーブド・スカラ・アプローチモデルの適用性
    松浦直輝; 菊田 健斗; 松岡 常吉; 中村 祐二; 奥村 幸彦
    日本機械学会 熱工学コンファレンス2021  2021
  • 水素保炎型アンモニア乱流拡散バーナーの燃焼解析
    坪田知大; 松田直也; 奥村幸彦; 北野貴寛; 堀 司; 赤松史光
    第 58 回日本伝熱シンポジウム講演論文集  2021
  • ガスエンジン特性に及ぼすアンモニア混合の影響
    星加浩輔,岸 直弥,奥村幸彦, 神原 信志
    第30回日本エネルギー学会大会  2021
  • 同軸噴流アンモニアバーナーにおける低 NOx化への一考察 - 重管による NOx還元域設定とバーナー設計 -
    松田直也、坪田知大、奥村幸彦、堀 司、赤松史光
    第59回燃焼シンポジウム  2021
  • 水素保炎型アンモニアバーナーのNOx反応解析- Thermal とFuel NOxとの分離およびNOx生成・消滅機構-
    松田,坪田; 奥村; 北野,堀,赤松
    第58回燃焼シンポジウム  2020/12
  • Fe触媒担持下のガス化速度とガス化機構 －含侵および形状効果の考察－
    松浦 直輝; 奥村 幸彦
    第５７回石炭科学会議  2020/10
  • ガスエンジン特性に及ぼすシンガス（CO/H2）混合比の影響
    岸 直弥; 星加 浩輔; 奥村 幸彦
    日本機械学会 熱工学コンファレンス2020  2020/10
  • 水素保炎型アンモニア乱流拡散火炎の燃焼構造
    坪田,松田; 奥村; 北野,堀; 赤松
    第29回日本エネルギー学会大会  2020/07
  • アンモニアの火炎構造に関する実験的研究：CO2フリー燃焼への検討
    奥村 幸彦
    第30回環境工学総合シンポジウム2020  2020/06
  • 詳細反応計算に向けたバイオマスからの揮発タール成分の定量分析
    第57回日本伝熱シンポジウム講演論文集  2020/06
  • バイオチャーのガス化モデリング  [Not invited]
    奥村 幸彦; 松浦 直輝
    第56回燃焼シンポジウム  2019/11
  • 草本バイオチャーのガス化速度とガス化機構  [Not invited]
    松浦 直輝; 奥村 幸彦
    第28回日本エネルギー学会大会講演論文集  2019/08
  • H2O/CO2雰囲気下におけるバイオチャーのガス化機構  [Not invited]
    奥村 幸彦
    第56回日本伝熱シンポジウム (日本伝熱学会主催)  2019/05
  • 基礎からわかるバイオ燃料 （ガス化）  [Not invited]
    奥村 幸彦
    中国地域バイオマス利用研究会によるシンポジウム  2019/03
  • 炭素転換率に伴うバイオマスチャー構造に関する研究 － ガス化剤の影響 -  [Not invited]
    奥村 幸彦
    第56回燃焼シンポジウム講演論文集  2018/11
  • 環境保全を目指したバイオマス/石炭の高度利用  [Invited]
    奥村 幸彦
    中四国熱科学・工学研究会，【特別】，日本伝熱学会中四国支部主催  2018/11
  • バイオマスからの一次揮発タール成分の詳細分析  [Not invited]
    奥村 幸彦
    第55回石炭科学会議論文集  2018/10
  • 第27回日本エネルギー学会大会講演論文集  [Not invited]
    OKUMURA Yukihiko
    第27回日本エネルギー学会大会講演論文集  2018/08
  • 環境保全を目指したバイオマスの高度利用  [Invited]
    奥村 幸彦
    近畿大学バイオコークス研究所技術セミナー  2018/08
  • 水素保炎を利用したアンモニアバーナーの開発  [Not invited]
    奥村 幸彦
    第55回燃焼シンポジウム講演論文集  2017/11
  • Fe 触媒担持下におけるチャーのガス化機構  [Not invited]
    奥村 幸彦
    第54回石炭科学会議  2017/10
  • ガス化の進行に伴うバイオマスチャー細孔の発達機構  [Not invited]
    奥村 幸彦; 大谷 周平; 田中 裕也
    第26回日本エネルギー学会大会(日本エネルギー学会主催)  2017/08
  • 触媒担持によるバイオマスチャーのガス化速度向上機構に関する研究  [Not invited]
    奥村 幸彦
    第27回環境工学総合シンポジウム  2017/07
  • 高機能性タールの高収率化
    奥村 幸彦
    第53回石炭科学会議  2016/10
  • バイオマスガス燃料使用の噴流拡散火炎に対するコンサーブド・スカラ・アプローチモデルの適用性に関する一検討  [Not invited]
    奥村 幸彦
    スマートプロセス学会誌  2016
  • 1-2-1 PM formation in the combustion of layered pulverized coal char
    OKUMURA Yukihiko; ASAHI Takaya; KUNIMOTO Yusuke
    Proceedings of the Annual Conference of The Japan Institute of Energy  2015  The Japan Institute of Energy
     
    We conducted combustion experiments under various furnace temperatures, heating rates, and coal types (ash melting point, ash content, and atomic ratio of raw coal) to systematically extract their effects on PM formation. There have been few studies on PM generation in a combustion field of layered char breeze as realized in the sintered ore production process, that is, in the field where pulverized coal char particles contact each other. The following tendencies were observed. With increasing furnace temperature, large ash particles became more prevalent, due to melting and coalescence. This effect was especially prominent for ash particles with a low melting point (approximately 1250℃), as compared to those with a high melting point (approximately 1450℃). As the heating rate increased, small particle generation increased. For raw coal with a high ratio of (H/C)/(O/C)×VM×ASH, char particles tend to become clump and swelling under the influence of adhesion during char formation, forming large ash particles.
  • 3-2-1 A consideration on mechanism of enhancement of gasification rate of biomass char diagnosed by cross section of supported catalysts
    OKUMURA Yukihiko; NAKAGAWA Takashi; HANAOKA Toshiaki
    Proceedings of the Annual Conference of The Japan Institute of Energy  2015  The Japan Institute of Energy
     
    The present study examined the mechanism underlying the enhancement of the gasification rate of biomass char when potassium (K) or iron (Fe) was supported on the char. The alkali metal catalysts were directly supported on the char with support ratios of 0, 2, 6, 10, and 20 wt%. When K was supported on the char, the gasification rate increased as the support ratio increased up to 10 wt%. Although the amount of the char-supported K catalyst slightly decreased due to heating during gasification (evaporation and scattering), the catalyst did not completely disappear, but remained on the surface of and inside the char and the remaining catalyst exerted its effect. The gasification rate was significantly lower when Fe was supported on char. This is due to a large decrease in the amount of char-supported Fe catalyst on the char surface because of evaporation and scattering.
  • 3-5-1 Effect of heating rate on first-tar component in biomass pyrolysis
    OKUMURA Yukihiko
    Proceedings of the Annual Conference of The Japan Institute of Energy  2014  The Japan Institute of Energy
     
    This paper reports on a biomass fuel usage by examining quantitatively the effect of the heating rate on the tar yield and on the formation of useful chemical components. A sample of biomass is placed in a quarts cell in an argon atmosphere, and the biomass is heated by an infrared gold image furnace. The infrared gold image furnace can program heating rates from 0.01 to 50 K/s. When the maximum temperature of 1073 K is reached, the applied voltage is interrupted. The tar vapor is trapped by cooled impinjer. The following states are main conclusion: (1) Yield of major chemical species of first-pyrolysis tar is composed of acetic acid, glucose, catechol, phenols, furfural, and cresol. (2) The yields of cyclized aromatic hydrocarbons such as benzene, toluene increase with increasing heating rate. (3) The yields of catechol and phenols do not increase significantly with increasing heating rate. At a slow heating rate, the yields of odorous components such as vanillin, furfural and cadinol increase.
  • No.17 Effect of coal type on tar component and PAH formation at first-stage pyrolysis
    OKUMURA Yukihiko; ASAHI Takaya
    Proceedings of Conference on Coal Science  2014  The Japan Institute of Energy
     
    In this work, we aim to contribute to the sophistication of chemical fuel usage by examining quantitatively the effect of coal type on the formation of useful tar components and on the tar yield, by using gas chromatography mass spectrometry (GC-MS). This study revealed that the yields of the primary pyrolysis components such as benzene, toluene, xylene, and indene increase with increasing H/C ratio. In addition, it showed that the yield of tar components (polycyclic aromatic hydrocarbons (PAHs), which are a source of particulate matter (PM)) increases with increasing H/C ratio.
  • 3-2-2 Effect of gasifying agent (H_2O, CO_2) on gasification rate of biomass-derived char
    Okumura Yukihiko
    Proceedings of the Annual Conference of The Japan Institute of Energy  2013  The Japan Institute of Energy
     
    This paper reports on the gasifying agent on gasification rate. The gasification kinetic rates of woody biomass-derived char have been revealed by measuring the rate of weight loss during its reaction with H_2O and CO_2 as a function of temperature. First-order kinetic rate constants are determined by fitting the weight loss data using a random pore model. The experimental results show that the high gasification rate in H_2O environment is appeared i.e., 2-10 times higher than that in CO_2 environment. When using gasifying agent of H_2O, rapid gasification can be carried out at low temperature (800℃) comparing with CO_2 gasifying-agent.
  • No.1 Effect of heating rate on tar component during first pyrolysis of coal
    OKUMURA Yukihiko
    Proceedings of Conference on Coal Science  2013  The Japan Institute of Energy
     
    A coal pyrolysis experiment is carried out to clarify the tar yields of devolatilization products in the range of heating rate (from 0.5 to 20K/s) and to clarify the molecule structure of tar evolving from coal. The tar yield increases with the heating rate. The tar components subjected to rapid heating contain a larger amount of aromatic hydrocarbons than do those subjected to slow heating.
  • I212 Effect of Cellulose, Hemi-cellulose and Lignin Compositions in Woody and Grass Biomass on Pyrolysis Process and Gas Yield
    OKUMURA Yukihiko; OKADA Takuya; OKAZAKI Ken
    Procee[d]ings of Thermal Engineering Conference  2012/11  The Japan Society of Mechanical Engineers
     
    This paper reports on the pyrolysis of various biomass materials. In particular, the primary yields of total volatiles, tar and non-condensable gases, together with the composition of non-condensable gases, are measured as a function of temperature. The results indicate that the pyrolysis process of wood and grass biomass (tar and gas evolution process) is greatly affected by the main composition (cellulose, hemicellulose and lignin) and the linear trends with atomic H/C ratio are observed in the tar yield, total volatile yield CO, CO_2 and CH_4 yields. The volatile yields of wood and grass biomass are predicted based only on the values of ultimate analysis of the biomass.
  • 3-2-1 Enhancement of Gasification Rate of Grass-Biomass Char under Low Temperature Condition by Supported Catalysts
    Okumura Yukihiko; Nakamura Yoshinari; Hanaoka Toshiaki; Nakashima Yoshie; Sakanishi Kinya
    Proceedings of the Annual Conference of The Japan Institute of Energy  2012  The Japan Institute of Energy
     
    This paper reports on the supported-K on gasification rate. Especially, the effect of direct supported-K in the char on gasification reactivity is described. The gasification kinetic rates of herbaceous and woody biomass-derived char have been revealed by measuring the rate of weight loss during its reaction with CO_2 as a function of temperature. First-order kinetic rate constants are determined by fitting the weight loss data using a random pore model. The experimental results show that the high gasification rate of biomass char is appeared i.e., 2-14 times higher than that of raw biomass-char by directly supported-K.
  • No.49 Study on Enhancement of Gasification Rate of Biomass Char by Supported Catalysts
    Okumura Yukihiko; Nakamura Yoshinari; Hanaoka Toshiaki; Nakashima Yoshie; Sakanishi Kinya
    Proceedings of Conference on Coal Science  2012  The Japan Institute of Energy
     
    This paper reports on the supported-K on gasification rate. Especially, the gasification kinetic rates of herbaceous and woody biomass-derived char have been revealed bymeasuring the rate of weight loss during its reaction with CO_2 as a function of temperature. The experimental results show that the high gasification rate of biomass char is appeared i.e., 2-14 times higher than that of raw-biomass char by directly supported-K.
  • No.54 Effect of slow volatile on N_2O formation in pulverized coal combustion
    OKUMURA Yukihiko; MATANABE Hirotatsu; OKAZAKI Ken
    Proceedings of Conference on Coal Science  2011  The Japan Institute of Energy
     
    The effects of various important factors, i.e., combustion temperature, N-content in coal, and volatilization process on N_2O formation were investigated by theoretical analysis.
  • Effect of O_2/CO_2 ratio on fuel-NO_x formation in oxy-coal combustion
    OKUMURA Yukihiko; Zhang Jingwei; Eddings Eric G.; Wendt Jost O.L.
    Proceedings of Conference on Coal Science  2010  The Japan Institute of Energy
     
    The pure effects of various important factors, i.e., the initial oxygen concentration, flame temperature and flame pattern on the NOx formation during oxy-coal combustion are investigated. As a result, we show the flame pattern changes from a detached flame to an attached flame with the increase in flame temperature. The single particle model for estimating NO_x emission level is applicable to the detached flame pattern. This implies that in the case of the detached flame, pulverized coal burns with a structure of premixed flame.
  • 3-13-3 Study on the N_2O formation under low temperature condition in biomass combustion
    OKUMURA Yukihiko; Okazaki Ken
    Proceedings of the Annual Conference of The Japan Institute of Energy  2010  The Japan Institute of Energy
     
    The effects of various important factors, i.e., oxygen concentration, N-content in biomass, and volatilization process on N_2O formation were investigated by theoretical analysis.
  • Characteristics of fuel-NO_x formation during oxycoal combustion
    OKUMURA Yukihiko; Zhang Jingwei; Eddings Eric G.; Wendt Jost O. L.
    Proceedings of Conference on Coal Science  2009  The Japan Institute of Energy
     
    The pure effects of various important factors of the initial oxygen concentration and flame temperature on the NO_x formation during oxy-coal combustion are investigated from experiment and theoretical analysis. As a result, we show (1) the formation mechanism of fuel-NO_x and (2) the emission of fuel-NO_x slightly increases with the O_2 concentration, and the gasification reaction between CO_2 and char occurs more vigorously than that during combustion in air.
  • 3-14 Relationship between gasification rate and biomass-char property
    OKUMURA Yukihiko; Hanaoka Toshiaki; Sakanishi Kinya
    Proceedings of the Annual Conference of The Japan Institute of Energy  2007  The Japan Institute of Energy
  • O212 Modeling of Pyrolysis for Biomass and Prediction of Yield and Composition for Volatile Matter
    OKADA Takuya; OKAZAKI Ken; OKUMURA Yukihiko
    Proceedings of the Conference on Biomass Science  2007  The Japan Institute of Energy
  • 3-75p Enhancement of Pressurized Steam Gasification Rate of Char Derived from Pyrolysis
    HANAOKA Toshiaki; NAKASHIMA Yoshie; SAKANISHI Kinya; OKUMURA Yukihiko
    Proceedings of the Annual Conference of The Japan Institute of Energy  2007  The Japan Institute of Energy
  • バイオマスの熱分解反応とそのモデリング
    岡田 卓哉; 奥村 幸彦; 岡崎 健
    化学工学会 研究発表講演要旨集  2006  公益社団法人 化学工学会
  • Modeling of pyrolysis/gasification reaction for coal and biomass
    OKUMURA Yukihiko
    Proceedings of the Annual Conference of The Japan Institute of Energy  2006  The Japan Institute of Energy
  • 3-3. Characteristics of biomass gasification under elevated pressure
    OKUMURA Yukihiko; OKADA Takuya; OKAZAKI Ken
    Proceedings of the Annual Conference of The Japan Institute of Energy  2006  The Japan Institute of Energy
  • 53. Pyrolysis and gasification of herbage biomass under atmospheric and elevated pressure conditions
    OKUMURA Yukihiko; OKAZAKI Ken
    Proceedings of Conference on Coal Science  2005  The Japan Institute of Energy
     
    The yields of pyrolysis products (tar and gas yields) of herbage biomass can be estimated by atomic ratios. The gasification rate of biomass char, which is 100 times higher than that of coal, increase with the increase in pressure.
  • 1-2 Effect of Maceral on Coal-Pyrolysis under High Pressure Conditions
    OKUMURA Yukihiko; OKAZAKI Ken
    Proceedings of the Annual Conference of The Japan Institute of Energy  2004  The Japan Institute of Energy
  • 1-1. Effect of Coal Rank on Coal-Pyrolysis under High Pressure Conditions
    OKUMURA Yukihiko; KANEUCHI Ken; OKAZAKI Ken
    Proceedings of the Annual Conference of The Japan Institute of Energy  2003  The Japan Institute of Energy
  • 加圧下での石炭熱分解に及ぼす炭種の影響  [Not invited]
    奥村幸彦; 金内健; 岡崎健
    第12回日本エネルギー学会大会  2003
  • 1-12. Inner Reactions of Rapid Heating Coal and Released Gas Composition in High Pressure Conditions
    OKUMURA Yukihiko; OKAZAKI Ken
    Proceedings of the Annual Conference of The Japan Institute of Energy  2002  The Japan Institute of Energy
  • 加圧下における石炭熱分解に及ぼす炭種の影響  [Not invited]
    奥村幸彦; 杉山ゆり子; 岡崎健
    第40回燃焼シンポジウム講演論文集  2002
  • 加圧下における急速加熱石炭の高分子反応とガス組成  [Not invited]
    奥村幸彦; 岡崎
    日本エネルギー学会、創立80周年記念大会  2002
  • 加圧下における急速加熱石炭の揮発分放出挙動とガス組成  [Not invited]
    奥村幸彦; 杉山ゆり子; 岡崎健
    第39回燃焼シンポジウム講演論文集  2001
  • 加圧下における石炭の急速熱分解（揮発分および窒素分の放出挙動）  [Not invited]
    奥村幸彦; 杉山ゆり子; 岡崎健
    第10回日本エネルギー学会大会講演論文集  2001

MISC

  • High intensity combustion of NH3 by a burner with a swirl-throttle structure
    Soma Yokoyama; Kosuke Hoshika; Shota Tsujimura; Naoya Kusunoki; Hiroyuki Inoue; Atsuki Yoshimoto; Yukihiko Okumura  International Joint Conferences Post-IWHT2024 and International Heat Transfer Seminar IHTS 2024  P1-26-  1  -2  2024/10
  • Flame structure and reaction diagnostics for ammonia diffusion flame with hydrogen flame stabilizer
    Yukihiko Okumura; Tomohiro Tsubota; Naoya Matsuda; Tsukasa Hori; Fumiteru Akamatsu  CI’s 40th International Symposium  4H02-  (PROCI-D-23-00516)  1  -8  2024/08  [Refereed]
  • Stabilization and high intensity combustion of low-combustibility bio-syngas
    奥村 幸彦  Industrial heating  61-  (4-364)  1  -7  2024/07  [Refereed]
  • 奥村幸彦  日本エネルギー学会機関誌Enermix  103-  (2)  127  2024/03
  • 安全・安心を目指した大型観光バスの換気設計とウィルスの高効率排除
    牧平 祥希; 奥村 幸彦  スパコン計算事例集、（公益財団法人）計算科学振興財団発刊  14-  16  -17  2024
  • Combustion characteristic of NH3/H2/N2 premixed flame
    Yukihiko Okumura, Tomohiro Tsubota, K. KIKUCHI , N. YAGAWA , T. MATSUNAMI,  Proc. 33rd International Symposium on Transport Phenomena (ISTP2023)  2023/09
  • Exhaust Gas Characteristics and NOx Formation Mechanism on Spark Ignition Engine Using By Bio-Syngas
    Hossain Zakir, Naoya Kishi and Yukihiko Okumura  AIChE Annual Meeting (American Institute of Chemical Engineers)  2023/09
  • Gasification rate of biomass-derived char with supported Fe catalysts and Gasification mechanism - Effect of Fe impregnation and pore development
    Hossain Md. Zakir, Naoki Matsu-ura, Yukihiko Okumura  Proc. 7th International Workshop on Heat-Mass Transfer Advances for Energy Conservation and Pollution Control (IWHT2023)  2023/08
  • Flame structure and reaction analysis for ammonia turbulent burner
    Yukihik Okumura  Proc. 7th International Workshop on Heat-Mass Transfer Advances for Energy Conservation and Pollution Control (IWHT2023)  2023/08  [Invited]
  • Ventilation design of tour buses for safety, security, and a highly efficient virus elimination
    Yoshihiro Makihira, Yukihiko Okumura  Proc. 7th International Workshop on Heat-Mass Transfer Advances for Energy Conservation and Pollution Control  2023/08
  • Effect of syngas (CO/H2) ratio on exhaust gas characteristics of gas engine
    Hossain Md. Zakir, Naoya Kishi, Yukihiko Okumura  Proc. International Workshop on Environmental Engineering 2023 (IWEE2022)  2023/07
  • Detailed Gasification Process of Biomass-Derived Char and Gasification Mechanism
    Hossain Md. Zakir, Naoki Matsu-ura, Yukihiko Okumura,  2022 AIChE Annual Meeting  2022/11
  • 奥村 幸彦  溶射  59-  (3)  175  -182  2022/06  [Refereed]
  • Reaction Analysis of nitrogen oxide for ammonia turbulent burner with hydrogen flame stabilizer
    Yukihiko Okumura, Tsukasa Hori, Fumiteru Akamatsu, Takahiro Kitano, Tomohiro Tsubota, Naoya Matsuda  Proc. 32nd International Symposium on Transport Phenomena (ISTP2022)  2022/03
  • 奥村 幸彦  溶射  59-  (1)  61  -66  2022/01  [Refereed][Invited]
  • Quantitative analysis of primary tar yields in biomass pyrolysis
    Yukihiko Okumura  2nd Asian Conference on Thermal Sciences  Combustion-1-  1  -2  2021/10  [Refereed]
  • Development of Ammonia burner with hydrogen flame stabilizer
    Yukihiko Okumura; Tsukasa Hori; Fumiteru Akamatsu; Takahiro Kitano; Tomohiro Tsubota; Naoya Matsuda  Proc. 2nd Asian Conference on Thermal Sciences  Combustion-1-  1  -2  2021/10  [Refereed]
  • Tomohiro TSUBOTA; Naoya MATSUDA; Yukihiko OKUMURA; Takahiro KITANO; Tsukasa HORI; Fumiteru AKAMATSU  The Proceedings of the Symposium on Environmental Engineering  2021.31-  305  -305  2021  [Refereed]
  • 石炭/バイオマスのガス化利用と基礎研究の動向
    奧村幸彦  日本機械学会 環境工学部門「環境と地球」  (32)  16  -17  2021
  • Numerical simulation of ammonia burner with hydrogen flame stabilizer
    Yukihiko Okumura; Tsukasa Hori; Fumiteru Akamatsu; Takahiro Kitano; Tomohiro Tsubota; Naoya Matsuda  31st International Symposium on Transport Phenomena  (29)  1  -6  2020/10  [Refereed]
  • Gasification mechanism of woody biomass-derived char with H2O and CO2 gasifying agents
    Yukihiko Okumura  Proc. 12th Asia-Pacific Conference on Combustion  (No. 2019- 1082)  1  -5  2019/07  [Refereed]
  • Gasification mechanism of woody biomass-derived char with supported Fe catalysts
    Yukihiko Okumura  Proc. The 16thINTERNATIONAL HEAT TRANSFER CONFERENCE  paper No. IHTC16-22290-  (New Energy and Efficiency-3 (N)  1  -8  2018/08  [Refereed]
  • Effect of Gasifying Agents on the Gasification Rate of Biomass-Derived Char
    Yukihiko Okumura; Shuhei Ohtani  Proc. The Ninth JSME-KSME Thermal and Fluids Engineering Conference  paper-TFE-  (C9-1010)  1  -5  2017/10  [Refereed]
  • MECHANISM OF GASIFICATION RATE-ENHANCEMENT ELUCIDATED BY CROSS-SECTIONAL ANALYSIS OF CATALYST-SUPPORTING BIOCHARS
    Yukihiko Okumura  Proceedings of the 4th International Forum on Heat Transfer  (IFHT2016-1830)  1  -6  2016/11  [Refereed]
  • A high-yield method for producing functional coal-tar component for use in advanced chemical applications
    Yukihiko Okumura  International Symposium on Combustion  4G03-  1  -55  2016/08  [Refereed]
  • EFFECT OF METAL SUPPORT ON GASIFICATION BEHAVIOR OF GRASS BIO-CHAR
    Yukihiko Okumura; Toshiaki Hanaoka  Proc. Asia Pacific Conference on Sustainable Energy & Environmental Technologies  (43)  63  -66  2015/07  [Refereed]
  • A HIGH-YIELD METHOD FOR PRODUCING FUNCTIONAL COAL TAR FOR USE IN ADVANCED APPLICATIONS
    OKUMURA Yukihiko  The 10th Asia Pacific Conference on Sustainable Energy & Environmental Technologies  (No. 36)  59  -62  2015/07  [Refereed]
  • Effect of heating rate on first-tar component in coal pyrolysis
    OKUMURA Yukihiko  Proc. 25th International Symposium on Transport Phenomena  (18)  1  -6  2014/11  [Refereed]
  • Pyrolysis Products and Yields from Brown to Anthracite Coals under elevated pressure conditions
    Yukihiko OKUMURA; Ken OKAZAKI  Proc. International Symposium on EcoTopia Science  ISBN:978-4-9907499-0-3-  (No.1020)  2013/12
  • Study on N2O formation under low temperature condition in pulverized biomass combustion
    Yukihiko OKUMURA; Hirotatsu WATANABE; Ken OKAZAKI  Proceedings of International Forum on Heat Transfer  4-  (No. IFHT2012-046)  1  -6  2012/11  [Refereed]
  • EFFECT OF PYROLYSIS TEMPERATURE AND PYROLYSIS PRESSURE ON GASIFICATION RATE OF WOODY BIOMASS-DERIVED CHAR
    Yukihiko Okumura; Toshiaki Hanaoka; Kinya Sakanishi  Proc. Second International Symposium on Gasification and Its Application  Paper ID:B24-  (No.54)  1  -12  2010/12
  • CPDモデルによる木質系,草本系バイオマス熱分解のモデリング(論文賞,平成21年度日本エネルギー学会 表彰受賞者と業績)
    岡田 卓哉; 岡崎 健; 奥村 幸彦  日本エネルギー学会誌  89-  (4)  A5  2010/04
  • バイオマスガス化
    奧村幸彦  日本機械学会 熱工学部門 Newsletter  (61)  2  -6  2010
  • 812 Enhancement of Pressurized Gasification Rate for Biomass Char
    OKUMURA Yukihiko; Hanaoka Toshiaki; Sakanishi Kinya  関西支部講演会講演論文集  2008-  (83)  "8  -17"  2008/03
  • E213 Pyrolysis and Gasification Behavior of Biomass
    OKUMURA Yukihiko; Hanaoka Toshiaki; Sakanishi Kinya  Procee[d]ings of Thermal Engineering Conference  2007-  327  -328  2007/11
  • 215 Prediction of Product Yields by Atomic Ratio in Pyrolysis/ Gasification of herbaceous biomass
    OKUMURA Yukihiko; OKAZAKI Ken  関西支部講演会講演論文集  2006-  (81)  "2  -26"  2006/03
  • 106 Synthesis of high-quality diamond film for electronic device applications
    OKUMURA Yukihiko; KANAYAMA Koichi  関西支部講演会講演論文集  2005-  (80)  "1  -17"-"1-18"  2005/03
  • OKUMURA Yukihiko; Tominaga Hiroaki; Yamashita Toru; Akimoto Akimitsu; OKAZAKI Ken  Proceedings of the Annual Conference of The Japan Institute of Energy  14-  36  -37  2005
  • OKUMURA Yukihiko; OKAZAKI Ken  Proceedings of Conference on Coal Science  42-  109  -110  2005
  • OKUMURA Yukihiko; OKAZAKI Ken  Proceedings of the Annual Conference of The Japan Institute of Energy  13-  26  -27  2004
  • Mechanisms of Coal-Pyrolysis and Combustion under High Pressure Conditions
    OKUMURA Yukihiko; OKAZAKI Ken  Procee[d]ings of Thermal Engineering Conference  2003-  229  -230  2003/11
  • 高電圧パルス付加反応によるダイアモンドの微結晶化制御と平滑膜の合成
    奥村 幸彦; 岡崎 健  舞鶴工業高等専門学校情報科学センター年報  (30)  37  -44  2002/03
  • OKUMURA Yukihiko; OKAZAKI Ken  Proceedings of the Annual Conference of The Japan Institute of Energy  80-  44  -45  2002
  • Effect of Electrode Properties on Transition Limit to High-Current Big-Arcs
    Yukihiko Okumura; Ken Okazaki  12th International Conference on MHD Electrical Power Generation  2-  962  -971  1996

Research Grants & Projects

  • ボイラ・ガスエンジンでのアンモニア・水素利用法確立
    国立研究開発法人科学技術振興機構：戦略的イノベーション創造プログラム（SIP）
    Date (from‐to) : 2023/04 -2026/03 
    Author : 奥村 幸彦(分担)
  • アンモニア燃料のナフサ分解炉実用化
    NEDO：グリーンイノベーション基金事業
    Date (from‐to) : 2021/04 -2026/03 
    Author : 奥村 幸彦
  • NOx低減と高負荷燃焼の同時機能を目指したアンモニアバーナーの開発
    日本学術振興会: 科学研究費助成事業：科学研究費補助金[基盤研究(C)]
    Date (from‐to) : 2019/04 -2023/03 
    Author : 奥村 幸彦
  • Optimization design of ammonia combustor for high intensity combustion and NOx reduction with simultaneous function
    High-Performance Computing Infrastructure：革新的ハイパフォーマンス・コンピューティング・インフラ (hp210108)
    Date (from‐to) : 2021/04 -2022/03 
    Author : Yukihiko Okumura
  • 鉄資源リサイクルのためのバイオマスバインダーの開発
    鉄鋼環境基金：2020年度 環境助成研究
    Date (from‐to) : 2020/11 -2021/11 
    Author : 奥村 幸彦
  • シンガス対応のバーナーおよびエンジン開発
    谷川熱技術振興基金2020：
    Date (from‐to) : 2020/10 -2021/10 
    Author : 奥村 幸彦
  • Development of ammonia burner for high intensity combustion and NOx reduction with simultaneous function
    大学共同利用機関法人情報・システム研究機構、公益財団法人計算科学振興財団、RIST、理研、東京大学：High-Performance Computing Infrastructure
    Date (from‐to) : 2020/04 -2021/03 
    Author : Yukihiko Okumura
  • CO2フリー燃焼ボイラーにおける高効率伝熱設計の確立
    公益財団法人 カシオ科学振興財団：カシオ科学振興財団研究助成金2019
    Date (from‐to) : 2019/12 -2020/12 
    Author : 奥村 幸彦
  • Rapid gasification of biomass in low-temperature
    公益財団法人 岩谷直治記念財団：2018年度 岩谷直治科学研究
    Date (from‐to) : 2019 -2020 
    Author : 奥村幸彦
  • Elucidation of the concentration and condensation mechanism of trace harmful metals to PM2.5 in coal combustion
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2014/04 -2019/03 
    Author : Okumura Yukihiko
     
    Multiple types of coal were pyrolyzed to obtain coke particles with different properties (melting point, amount of ash, caking and agglomerating properties). The coke particles were arranged to form layers and they were combusted. The effects of various factors on PM formation were then investigated. (1) PM 2.5 was easily formed in a low temperature atmosphere (below 1000°C).(2) Combustion of coke particles produced from ash with a low melting point (approximately 1230°C) resulted in formation of lower amounts of PM 2.5 than combustion of coke particles from ash with a high melting point (approximately 1450°C). This is because the melting and coalescence of ash particles were easier in the former ash than in the latter ash.(3) The PM 2.5 formation can be suppressed by blending coal containing ash with a low melting point. In addition, The PM 2.5 formation can be suppressed by blending coal with a high value of the indicator.
  • 水素保炎によるアンモニアバーナーの開発
    谷川熱技術振興基金：谷川熱技術振興基金研究助成
    Date (from‐to) : 2017/10 -2018/10 
    Author : 奥村 幸彦
  • コークス副生ガス/バイオマスによる液体燃料化と化学原料化高度利用法の構築
    公益財団法人JFE21世紀財団：JFE21世紀財団技術研究助成
    Date (from‐to) : 2015 -2016 
    Author : 奥村 幸彦
  • Construction of hydrogen production system and the GTL technology from grass and woody biomasses
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2010/04 -2014/03 
    Author : OKUMURA Yukihiko
     
    The pyrolysis rate of biomass is much higher than the gasification rate of char, the overall conversion rate of biomass is controlled by the gasification rate of char (that is, carbides formed after pyrolysis) in the reduction zone. That is, the overall gasification rate is limited by the slow gasification-rate of char in the endothermic reaction zone. Hence, we attempted to improve the gasification reactivity by using an alkali metal catalyst at low temperatures. The main results are summarized. (1) When potassium is directly supported on char, the gasification rate of wood biomass (Douglas-fir char) increases by approximately 4-5 times even at a small support ratio (2.1 wt%). (2) The gasification rate can be significantly improved even at low temperatures by using a method in which potassium is directly supported on char. The catalytic effect of potassium is observed for not only wood biomass but also grass biomass.
  • 草本・木質バイオマスからの水素製造と液体燃料化技術の構築
    日本学術振興会: 科学研究費助成事業：科学研究費補助金（基盤研究(C)）
    Date (from‐to) : 2010/04 -2014/03 
    Author : 奥村 幸彦
  • Fundamental research for reduction of pollutant emission of coal combustion for zero CO_2 emission
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
    Date (from‐to) : 2009 -2011 
    Author : OKAZAKI Ken; FUSHINOBU Kazuyoshi; OKUMURA Yukihiko
     
    We developed fundamental theory to achieve ultra-clean and high efficiency coal combustion for zero CO_2 emission(O_2/CO_2 coal combustion) simultaneously. The conditions are shown to use high CO_2 concentration, which is the feature in O_2/CO_2 coal combustion, for low-NO_x combustion. The lowest NO_x conversion ratio in O_2/CO_2 combustion is lower than it in air combustion by 40%. Moreover, it is shown that carbonate, which has a potential to affect ash deposition and gasification, is formed due to the mineral reaction with CO_2.
  • 加圧下における石炭の水素ガス化機構の解明
    日本学術振興会: 科学研究費助成事業：科学研究費補助金（基盤研究(C)）
    Date (from‐to) : 2005/04 -2009/03 
    Author : 奥村 幸彦
  • 高圧下におけるバイオマスガス化機構の解明と次世代型ガス化技術の構築
    中部電力：中部電力科学研究振興財団研究助成
    Date (from‐to) : 2008 -2009 
    Author : 奥村 幸彦
  • Research on Mechanism of Coal Gasification under Elevate Pressure Condition
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2005 -2008 
    Author : OKUMURA Yukihiko
     
    現在,加圧石炭噴流床ガス化炉のパイロット試験が行なわれており,そのスケールアップ,多炭種対応化,要素設計等が推しはかられている.この中でも特に,炉設計に及ぼす炭種の影響は大きく,それ故,簡易に活用(利用)できる熱分解収率の予測式(予測方法)を示すことが強く求められていた.そこで本研究では,褐炭~半無煙炭までの約20 炭種を用いて熱分解実験を行い,さらに大気圧~加圧下における揮発分収率を系統的に整理して,簡易に利用できる揮発分収率および揮発分成分の予測式(方法論)を示した.加えて,石炭/バイオマスハイブリッドガス化構想にも対応できるように,バイオマスの熱分解・ガス化挙動(即ち加圧下での草本~木質系バイオマスの反応速度,熱分解時の生成ガス組成・量)についても明らかにした.
  • 高電圧パルス放電直接印加による火炎内汚染物質の除去(NOx,SOx,すす除去機構と放電化学反応)
    日本学術振興会：科学研究費助成事業
    Date (from‐to) : 1995 -1995 
    Author : 奥村 幸彦
     
    本研究では、火炎に放電を直接印加して反応を制御し、有害物質を極力発生させないクリーン燃焼法を試みた。 成果1.燃焼器および高電圧パルス発生装置の製作 本研究では、次の2種類の火炎、すなわち、(1)対向層流拡散火炎と、(2)同軸噴流拡散火炎を形成できる燃焼器を製作した。(1)の火炎を用いた場合、放電により生成する励起種、イオン、電子等が特定されやすく、高電界中における多数の並列放電化学反応について明かにすることができる。(2)の火炎を用いた場合は、(1)のような基礎的研究というよりも、むしろ工場や発電所で用いられている火炎に放電印加することを模擬した実用的試験研究であり、実際の放電応用に重点を置いたものである。 また、燃焼器の組み立てと同時に、高電圧パルス発生装置も製作した.電気的外部パラメータ(スライダック電圧、同軸ケーブルの長さ、回転式接点器のモーター回転数)の設定により、放電形式(電圧パルス高さ、電圧パルス幅、周期、周波数)が任意に可変できるため、この装置では放電化学反応を効率よく起こすことが可能である。 成果2.化学種濃度、温度分布、電位の把握と影響因子の抽出 高電圧パルス放電下における火炎構造(濃度、温度など)と無放電のそれを比較し、火炎内すす等に及ぼす高電界印加の影響を明らかにした。研究成果としては、クリーン燃焼器を開発する上で必要とされる基礎データを得ることができた。具体的に主たる結果を示すと、上記の(1)の実験により、1.すすは高電界により微細化すること、2.熱分解帯内における燃料は吸熱放電反応を起こすこと、等が明らかになった。さらに(2)を用いた実験により(直流電圧印加の場合であるが)、1.火炎形状が細くなること、2.渦生成位置が上流に移動する現象などが初めて観測された。 以上から,本手法のような制御法を用いることにより火炎内の有害物質の選択的な除去や特定のラジカルの生成といった所望の反応を起こしうる可能性が十分あることを示した。

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