Combined single-pass conversion of methane via oxidative coupling and dehydroaromatization

被引：16

作者：

Li, YG ^{[1
]}

Su, LL ^{[1
]}

Wang, HX ^{[1
]}

Liu, HM ^{[1
]}

Shen, WJ ^{[1
]}

Bao, XH ^{[1
]}

Xu, YD ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

来源：

CATALYSIS LETTERS | 2003年 / 89卷 / 3-4期

基金：

中国国家自然科学基金;

关键词：

single-pass; methane; oxidative coupling; dehydroaromatization; aromatics;

D O I：

10.1023/A:1025723000836

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：

A new reaction mode, i.e., the combined single-pass conversion of methane via oxidative coupling (OCM) over mixed metal oxide (SLC) catalysts and dehydroaromatization (MDA) over Mo/HZSM-5 catalysts, is reported. With the assistance of an OCM reaction over SLC catalysts in the top layer of the reactor, the deactivation resistance of Mo/HZSM-5 catalysts is remarkably enhanced. Under the selected reaction conditions, the CH4 conversion decreased from similar to18 to similar to1% and the aromatics yield decreased from 12.8 to 0.1%, respectively, after running the reaction for 960 min on both 6Mo/HZSM-5 and SLC-6Mo/HZSM-5 catalyst system without O-2 in the feed. On the other hand, for the SLC-6Mo/HZSM-5 catalyst system with O-2 in the feed, the deactivation was improved greatly, and after 960 min onstream the CH4 conversion and aromatics yield were still as high as 12.0 and 8.0%, respectively. The promotion effect mainly appears to be associated with in situ formation of CO2 in the OCM layer, which reacts with coke via the reverse Boudouard reaction.

引用

页码：275 / 279

页数：5

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