Perovskite-type oxides - catalysts for the total oxidation of chlorinated hydrocarbons

被引：78

作者：

Kiessling, D

Schneider, R

Kraak, P

Haftendorn, M

Wendt, G

机构：

[1] Univ Leipzig, Inst Tech Chem, D-04103 Leipzig, Germany

[2] KataLeuna GmbH, D-06236 Leuna, Germany

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 1998年 / 19卷 / 02期

关键词：

perovskite-type oxides; total oxidation; chlorinated hydrocarbons; catalyst deactivation; by-products;

D O I：

10.1016/S0926-3373(98)00073-3

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：

Chloromethane, dichloromethane and 1,2-dichloroethane were completely decomposed in air on perovskite-type catalysts (LaMnO3, LaCoO3, (La0.84Sr0.16)(Mn-0.67,Co-0.33)O-3) at reaction temperatures above 550 degrees C. Besides the main reaction products (carbon dioxide, water and hydrochloric acid), by-products (higher chlorinated-, C-C coupling- and cracking products) were formed in the low temperature range. Depending on the reaction temperature, residence time and kind of chlorinated hydrocarbon a reversible catalyst deactivation takes place. In the case of LaCoO3 catalysts an irreversible deactivation was observed. X-ray diffraction (XRD) and electron probe microanalysis (EPMA) measurements with the perovskite-type catalysts after interaction of chlorinated hydrocarbons indicate the formation of chlorinated species on the catalyst surface and in the bulk. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：143 / 151

页数：9

共 34 条

[21] Total oxidation of chlorinated hydrocarbons on LaMnO3 perovskite type catalyst [J].