Determining the influence of microwave-induced thermal unevenness on vanadium oxide catalyst particles

Shuntaro Tsubaki, Tomoki Matsuzawa, Tomoki Higuchi, Satoshi Fujii, Yuji Wada

研究成果: ジャーナルへの寄稿学術誌査読

抄録

Microwave (MW) heating accelerates various heterogeneous catalytic reactions at low temperatures, leading to energy-efficient catalytic processes. Herein we report the formation of MW–formed uneven thermal distribution at the interparticle of V2O5 catalyst by using microscopic thermography and electromagnetic/thermal flow simulations. The local heat generation started from the contact point of the spherical catalyst particles. The uneven thermal distribution changed as the oxidation state of the catalyst dynamically changed during the dehydration of 2-propanol. In situ Raman spectroscopy suggested that dynamic change in the thermal gradient attributes to the oxidation state of the V2O5 catalyst. As a result, the formation of the local hot spot at the contact point of the V2O5 catalyst particles, as well as the oxidation state of V2O5 due to MWs, synergistically affect the enhancement in the dehydration of 2-propanol. The present results provide important insights into a mechanistic understanding of the reaction enhancement of the fixed-bed flow reaction owing to the MW-induced uneven thermal distribution.

本文言語英語
論文番号133603
ジャーナルChemical Engineering Journal
433
DOI
出版ステータス出版済み - 4月 1 2022
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 環境化学
  • 化学工学(全般)
  • 産業および生産工学

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