Different mechanisms of ethane aromatization over Mo/ZSM-5 and Ga/ZSM-5 catalysts

被引：55

作者：

Uslamin, Evgeny A. ^{[1
]}

Saito, Hikaru ^{[2
]}

Sekine, Yasushi ^{[2
]}

Hensen, Emiel J. M. ^{[1
]}

Kosinov, Nikolay ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Dept Chem Engn & Chem, Lab Inorgan Mat & Catalysis, POB 513, NL-5600 MB Eindhoven, Netherlands

[2] Waseda Univ, Dept Appl Chem, Shinjuku Ku, 3-4-1 Okubo, Tokyo 1698555, Japan

来源：

CATALYSIS TODAY | 2021年 / 369卷 / 369期

关键词：

Ethane; Aromatics; Mo; ZSM-5; Ga; Mechanism; METHANE DEHYDROAROMATIZATION; DILUTE ETHYLENE; HYDROCARBONS; CONVERSION; HZSM-5; METAL; DEHYDROGENATION; ACTIVATION; BENZENE; CATIONS;

D O I：

10.1016/j.cattod.2020.04.021

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Aromatization of light hydrocarbons can contribute to a secure supply of aromatics for the chemical industry. In this work, we investigate the influence of modification of zeolite ZSM-5 with Ga and Mo on the reaction mechanism underlying the activation and aromatization of ethane. Well-defined Mo/ZSM-5 and Ga/ZSM-5 zeolites efficiently promote ethane aromatization to benzene-toluene-xylene mixtures. Both catalysts suffer from coke formation, which leads to rapid deactivation. From catalytic tests, temperature-programmed surface reaction and pulsed reaction experiments, we infer that ethane conversion on Ga/ZSM-5 follows a conventional sequential dehydrogenation-oligomerization-aromatization mechanism, while the reaction over Mo/ZSM-5 involves reactive surface carbon (hydrocarbon pool) species.

引用

页码：184 / 192

页数：9

共 45 条

[21] Stable Mo/HZSM-5 methane dehydroaromatization catalysts optimized for high-temperature calcination-regeneration [J].