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.

引用

页码：70 / 74

页数：5

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