Deactivation of fiber-supported La0.65Sr0.35Ni0.29Co0.69Fe0.02O3 catalyst by mercaptan during combustion of methane or natural gas

被引：26

作者：

Klvana, D ^{[1
]}

Delval, J ^{[1
]}

Kirchnerova, J ^{[1
]}

机构：

[1] Ecole Polytech, Dept Chem Engn, Montreal, PQ H3C 3A7, Canada

来源：

APPLIED CATALYSIS A-GENERAL | 1997年 / 165卷 / 1-2期

关键词：

methane combustion catalyst; supported perovskite; deactivation by methyl-mercaptan; inhibition of complete methane oxidation by combustion products;

D O I：

10.1016/S0926-860X(97)00199-3

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：

A fiber-supported La0.65Sr0.35Ni0.29Co0.69Fe0.02O3 perovskite combustion catalyst has been developed. The preparation technique consisted of in-situ perovskite formation via incipient fiber blanket wetting, followed by freeze-drying. The catalyst activity, per gram of perovskite, is higher than that of unsupported fine La0.65Sr0.35Ni0.29Co0.69Fe0.02O3 powder. Kinetics of deactivation of this catalyst by sulfur oxides, resulting from total oxidation of methyl-mercaptan during methane and natural gas combustion, has been studied in a CSTR Berty reactor. The effects of temperature, methane contact time and mercaptan concentration, as well as combustion products were evaluated. The experimental data has been fitted by a simple deactivation model based on Levenspiel's formalism. The observed deactivation rates were relatively slow in comparison to known deactivation rates by sulfur dioxide of some transition metal based catalysts, In particular, the catalyst seems to tolerate mercaptan concentration levels, commonly used to odorize commercial natural gas, as confirmed by long term tests in an integral reactor. (C) 1997 Elsevier Science B.V.

引用

页码：171 / 182

页数：12

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