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

Satoshi Inaba*

*この研究の対応する著者

研究成果: Article査読

1 被引用数 (Scopus)

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.

本文言語English
論文番号373
ジャーナルCatalysts
9
4
DOI
出版ステータスPublished - 2019 4

ASJC Scopus subject areas

  • 触媒
  • 物理化学および理論化学

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