研究者業績

山田 泰弘

ヤマダ ヤスヒロ  (Yasuhiro Yamada)

基本情報

所属
千葉大学 大学院工学研究院 准教授
学位
Ph.D.(2008年2月)

研究者番号
90546780
ORCID ID
 https://orcid.org/0000-0002-4974-5148
J-GLOBAL ID
202001010967207421
researchmap会員ID
R000000926

外部リンク

論文

 137
  • Takuto Adachi, Enggah Kurniawan, Takayoshi Hara, Ryoji Takahashi, Yasuhiro Yamada, Satoshi Sato
    Applied Catalysis A: General 685 2024年9月25日  
    Vapor-phase intramolecular aldol condensation of 2,5-hexanedione (2,5-HD) to 3-methyl-2-cyclopentenone (MCP) was performed over several rare-earth zirconate catalysts, with yttrium zirconate (YZrO) emerged as the most efficient catalyst. Several parameters, such as Y content, calcination temperature, reaction temperature, and contact time, highly influenced the catalytic performance of the YZrO catalyst: YZrO calcined at 700 °C exhibited the highest catalytic activity but still suffered from catalyst deactivation due to coke formation. Modifying the YZrO with Ag and employing the modified catalyst in an H2 flow effectively reduced the coke accumulation, thus improving the catalytic stability during the aldol condensation of 2,5-HD at 350 °C. The poisoning experiment with the co-fed of acidic CO2 gas and basic molecules of 2,6-, and 3,5-dimethylpyridine suggested that the aldol condensation proceeded via an acid-base concerted mechanism.
  • Takami Inaba, Enggah Kurniawan, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
    Bulletin of the Chemical Society of Japan 97(5) uoae049 2024年5月3日  査読有り
  • Koki Sato, Enggah Kurniawan, Shun Sasaki, Kenta Matsusaka, Yasuhiro Yamada, Satoshi Sato
    Bulletin of the Chemical Society of Japan 97(3) 2024年3月  
    Silica-supported Cu (Cu/SiO2) prepared by using an organic additive-assisted impregnation method was employed as a catalyst for the dehydrogenation of 3-methyl-2-butanol (3M2BO) to 3-methyl-2-butanone (methyl isopropyl ketone, MIPK). The utilization of organic additives, especially mannitol, during the impregnation protocol has led to the generation of a Cu/SiO2 catalyst containing highly dispersed Cu nanoparticles, i.e. high Cu surface area (SACu). These properties contributed to the high activity of the mannitol-assisted Cu/SiO2 catalyst, in which the activity was limited only by the equilibrium nature of the reaction. The proportional relationship between the formation rate of the MIPK with the SACu confirmed the benefits of the utilization of organic additives. In addition, the improvement in the SACu of Cu/SiO2 prepared using mannitol only gave a negligible side product originating from the dehydration of 3M2BO; thus, the equilibrium MIPK yield of 99.5% was achieved even at 300 °C.
  • Shun Sasaki, Enggah Kurniawan, Yasuhiro Yamada, Satoshi Sato
    Chemistry Letters 53(3) 2024年3月  
    A highly efficient and stable Cu/SiO2 catalyst was prepared via 12-crown-4-ether (12C4)-assisted impregnation and used in the vapor-phase conversion of glycerol to 1,2-propanediol (propylene glycol, PG) via acetol formation in an ambient hydrogen flow. The 12C4-Cu/SiO2 catalyst gave a PG yield of >97% due to a low rate of C-C cleavage to generate ethylene glycol. Under optimum conditions, the high catalytic performance was maintained for 98 h of time on stream.
  • Arisa Sato, Kazuma Gotoh, Satoshi Sato, Yasuhiro Yamada
    Carbon 222 118904-118904 2024年3月  査読有り最終著者責任著者

書籍等出版物

 4

共同研究・競争的資金等の研究課題

 29

産業財産権

 18

メディア報道

 1