The function of Cu(II) ions in the Mo/CuH-ZSM-5 catalyst for methane conversion under non-oxidative condition

被引：65

作者：

Li, S

Zhang, CL

Kan, QB

Wang, DY

Wu, TH ^{[1
]}

Lin, LW

机构：

[1] Jilin Univ, Dept Chem, Changchun 130023, Peoples R China

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

来源：

APPLIED CATALYSIS A-GENERAL | 1999年 / 187卷 / 02期

关键词：

Cu(II) ions; promoter; Mo/CuH-ZSM-5; methane aromatization; benzene;

D O I：

10.1016/S0926-860X(99)00231-8

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：

Non-oxidative aromatization of methane was carried out over Mo/CuH-ZSM-5 and compared with that over Mo/H-ZSM-5. Cu(II) ions act as promoter in this reaction and improve the activity of the Mo/H-ZSM-5 catalyst notably. The effect of Cu species on the chemical state of Mo species and the changes of Cu species itself after reaction were studied by ESR and XPS methods. The introduction of Cu ions by ion-exchange method altered the reduction of Mo species, suppressed the dealumination of ZSM-5 framework and decreased coke formation over the catalyst. The results showed improved catalytic performance of Mo/H-ZSM-5 catalyst. The amount and nature of the coke which were influenced by the introduction of Cu ions were also investigated. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：199 / 206

页数：8

共 21 条

[11] Influences of zeolite structure on formation and location of coke: A Xe-129 and C-13 CP-MAS NMR study [J].