Effect of Mg addition on catalytic performance of Mo/ZSM-5 catalyst for methane aromatization

被引：0
|
作者：
Bai, J [1 ]
Liu, SL [1 ]
Xie, SJ [1 ]
Xu, LY [1 ]
Lin, LW [1 ]
机构：
[1] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
来源：
CHINESE JOURNAL OF CATALYSIS | 2004年 / 25卷 / 01期
关键词：
molybdenum; ZSM-5; zeolite; magnesium; modification; methane; aromatization;
D O I：
暂无
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The effect of Mg addition no the Mo/ZSM-5 catalyst Was investigated by XRD, nitrogen adsorption and pyridine FTAR methods. The FTAR spectra of pyridine adsorbed on Mo-Mg/ZSM-5 indicated that the ratio of Lewis acid sites to Bronsted acid sites on the catalyst samples increased with the increase of Mg loading. When Mo-Mg/ZSM-5 was used in methane dehydro-aromatization, the carbon deposition on the catalyst decreased with the increase of Mg loading, and only the stability of 6% Mo-0.75% Mg/ZSM-5 was higher than that of 6% Mo/ZSM-5. This illuminated that the catalyst stability can be enhanced by optimizing the ratio of Lewis acid sites to Bronsted acid sites with medium/strong strength in the presence of enough Bronsted acid sites.
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页码：70 / 74
页数：5
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