Acid-base catalytic effects on reduction of methanol in hot water

研究成果: Article

抄録

We have performed a number of quantum chemical simulations to examine the reduction process of methanol in hot water. Methanol is converted into a methane by capturing a hydrogen molecule and leaving a water molecule behind. The required energy for the reduction is too high to proceed in the gas phase. The energy barrier for the reduction of methanol is reduced by the catalytic effect of water molecules when we consider the reduction in aqueous solution. However, the calculated reduction rate is still much slower than that found experimentally. The ion product of water tends to increase in hot water, even though it eventually decreases at the high temperature of supercritical water. It is valuable to consider the acid-base catalytic effects on the reduction of methanol in hot water. The significant reduction of the energy barrier is accomplished by the acid-base catalytic effects due to hydronium or hydroxyde. Mean collision time between a hydronium and a methanol in hot water is shorter than the reduction time, during which a methanol is converted into a methane. The calculated reduction rate with the acid-base catalytic effects agrees well with that determined by laboratory experiments. The present study reveals a crucial role of the acid-base catalytic effects on reactions in hot water.

元の言語English
記事番号373
ジャーナルCatalysts
9
発行部数4
DOI
出版物ステータスPublished - 2019 4 1

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Methanol
methyl alcohol
acids
Acids
Water
water
Energy barriers
Methane
Molecules
methane
molecules
energy
Hydrogen
Gases
Ions
vapor phases
aqueous solutions
collisions
hydrogen
products

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

これを引用

Acid-base catalytic effects on reduction of methanol in hot water. / Inaba, Satoshi.

:: Catalysts, 巻 9, 番号 4, 373, 01.04.2019.

研究成果: Article

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