COMPARISON OF LANTHANUM OXIDE AND STRONTIUM-MODIFIED LANTHANUM OXIDE CATALYSTS FOR THE OXIDATIVE COUPLING OF METHANE

被引：31
|
作者：
CONWAY, SJ
GREIG, JA
THOMAS, GM
机构：
[1] British Gas plc. Midlands Research Station, Solihull, B91 2JW, Wharf Lane
来源：
APPLIED CATALYSIS A-GENERAL | 1992年 / 86卷 / 02期
关键词：
LANTHANUM OXIDE; STRONTIUM-MODIFIED LANTHANUM OXIDE; METHANE CONVERSION; OXIDATIVE COUPLING;
D O I：
10.1016/0926-860X(92)85148-5
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 activity and selectivity of lanthanum oxide and strontium-modified lanthanum oxide catalysts for the oxidative coupling of methane have been compared. Lanthanum oxide is more active than strontium-modified lanthanum oxide. This is thought to be due to a reduction in the surface concentration of active lanthanum, by replacement with less active strontium carbonate. During methane coupling, catalyst performance varies. This is dependent on calcination temperature and the presence of strontium carbonate. These variations are related to the relative concentration of two types of lanthanum oxycarbonate which may be formed, and their stability, during reaction.
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页码：199 / 212
页数：14
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