Identification of the coke accumulation and deactivation sites of Mo2C/HZSM-5 catalyst in CH4 dehydroaromatization

被引：21

作者：

Honda, K ^{[1
]}

Chen, X ^{[1
]}

Zhang, ZG ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Toyohira Ku, Sapporo, Hokkaido 0628517, Japan

来源：

CATALYSIS COMMUNICATIONS | 2004年 / 5卷 / 10期

关键词：

methane dehydroaromatization; Mo/HZSM-5; coke accumulation; deactivation; benzene;

D O I：

10.1016/j.catcom.2004.07.005

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：

Identifying the preferentially coking sites of Mo2C/HZSM-5 catalyst in the CH4 dehydroaromatization at non-oxidative conditions was attempted by employing a physically separable Mo2C/alpha-Al2O3 + HZSM-5 mixture instead of Mo2C/HZSM-5 as catalyst. Photographic observation on the spent Mo2C/alpha-Al2O3 and HZSM-5 components separated from the deactivated mixture and their thermogravimetric analysis clearly revealed that coke accumulation occurred predominantly on the HZSM-5. Then, the comparative activity tests with the physical blends of the deactivated Mo2C/alpha-Al2O3 + HZSM-5 mixture sample with fresh Mo2C/alpha-Al2O3 or HZSM-5 further confirmed that the coked HZSM-5 component in the deactivated mixture definitely deactivated while that uncoked Mo2C constituent remained highly active. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：557 / 561

页数：5

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