THE IMPORTANCE OF WATER IN THE MECHANISM OF METHANOL DECOMPOSITION ON ZNO

被引：28
作者：
CHADWICK, D
ZHENG, KG
机构：
[1] Department of Chemical Engineering and Chemical Technology, Imperial College of Science, Technology and Medicine, London
来源：
CATALYSIS LETTERS | 1993年 / 20卷 / 3-4期
关键词：
METHANOL; WATER; ZNO; TPD;
D O I：
10.1007/BF00769295
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The decomposition of methanol on ZnO has been investigated by temperature programmed desorption. The main decomposition products were CO and H-2 With only a small amount of CO2. The influence of water on methanol decomposition has been studied by a series of quantitative co-adsorption experiments. As the amount of coadsorbed water was increased, the CO yield decreased whereas that of the CO2 increased and went through a maximum. This indicated that water and methanol competed for the same adsorption sites. The results suggest that methanol (or dehydrogenated intermediate) reacts with coadsorbed water to form CO2 and H-2. Preadsorbed or residual water give similar results.
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页码：231 / 242
页数：12
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