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论文类型： 期刊论文

发表时间： 2014-03-01

发表刊物： JOURNAL OF ENERGY CHEMISTRY

收录刊物： SCIE、EI、ISTIC、Scopus

卷号： 23

期号： 2

页面范围： 201-206

ISSN号： 2095-4956

关键字： methane; methanol to hydrocarbons; decomposition; hydrogenolysis; thermodynamic analysis

摘要： The influence factors and paths of methane formation during methanol to hydrocarbons (MTH) reaction were studied experimentally and thermodynamically. The fixed-bed reaction results show that the formation of methane was favored by not only high temperature, but also high feed velocity, low pressure, as well as weak acid sites dominated on deactivated catalyst. The thermodynamic analysis results indicate that methane would be formed via the decomposition reactions of methanol and DME, and the hydrogenolysis reactions of methanol and DME. The decomposition reactions are thermal chemistry processes and easily occurred at high temperature. However, they are influenced by catalyst and reaction conditions through DME intermediate. By contrast, the hydrogenolysis reactions belong to catalytic processes. Parallel experiments suggest that, in real MTH reactions, the hydrogenolysis reactions should be mainly enabled by surface active H atom which might come from hydrogen transfer reactions such as aromatization. But H-2 will be involved if the catalyst has active components like NiO.