EFFECT OF SIO2/AL2O3 RATIO ON THE ACTIVITY OF HZSM-5 ZEOLITES IN THE DIFFERENT STEPS OF METHANOL CONVERSION TO HYDROCARBONS

被引：29
|
作者：
LUKYANOV, DB
机构：
[1] Karpov Institute of Physical Chemistry, Moscow
来源：
ZEOLITES | 1992年 / 12卷 / 03期
关键词：
ZSM-5; METHANOL CONVERSION; CATALYTIC ACTIVITY; CATALYTIC SITES;
D O I：
10.1016/S0144-2449(05)80297-0
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：
The conversion of methanol to hydrocarbons over HZSM-5 zeolites of different SiO2/Al2O3 ratio was studied at 450-degrees-C. The initial zeolite activity in the different steps of the reaction (alkene formation from methanol and dimethyl ether, alkene aromatization, coke formation) was strictly proportional to the aluminum content of the zeolites. Under reaction conditions, catalytic properties of HZSM-5 of different aluminum content were modified in the initial period of catalyst performance in different ways. Enhanced activity sites, which are generated in HZSM-5 of relatively high aluminum content, were shown to be the reason for enhanced aromatization and coking activity of these zeolites.
引用
收藏
页码：287 / 291
页数：5
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