Study on deactivation of Co/ZrO2/SiO2 catalyst for Fischer-Tropsch synthesis

被引：26

作者：

Chen, JG ^{[1
]}

Xiang, HW ^{[1
]}

Gao, HY ^{[1
]}

Sun, YH ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China

来源：

REACTION KINETICS AND CATALYSIS LETTERS | 2001年 / 73卷 / 01期

关键词：

cobalt catalyst; deactivation; hydrated cobalt silicate;

D O I：

10.1023/A:1013909912990

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 Co/ZrO2/SiO2 catalyst active for synthesis of heavy hydrocarbons from syngas was subjected to a stability test of 500 h on a laboratory scale. The catalyst showed a considerable decrease in CO conversion, while the hydrocarbon distribution hardly changed with time on stream. The regeneration of deactivated catalyst with H-2 at 673 K partially restored the activity. XRD, FT-IR and TGA identified a hydrated cobalt silicate species in the catalyst near the reactor outlet. Thus, the cause of deactivation was proposed mainly to be the formation of inactive hydrated silicate between Co metal and silica in presence of high partial pressure of water.

引用

页码：169 / 177

页数：9

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