Effects of K and Mn promoters over Fe2O3 on Fischer–Tropsch synthesis

被引：4

作者：

Teng Lv ^{[1
]}

Wei Weng ^{[1
]}

Jing Zhou ^{[2
]}

Dong Gu ^{[2
]}

Wei Xiao ^{[1
]}

机构：

[1] School of Resource and Environmental Sciences, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy,Wuhan University

[2] The Institute for Advanced Studies, Wuhan University

来源：

Journal of Energy Chemistry | 2020年 / 47卷 / 08期

基金：

中央高校基本科研业务费专项资金资助; 中国博士后科学基金; 中国国家自然科学基金; 国家重点研发计划;

关键词：

Fischer–Tropsch synthesis; K promoter; Mn promoter; CO conversion; C5+ selectivity;

D O I：

暂无

中图分类号：

TQ426 [催化剂（触媒）]; TQ529.2 [间接液化];

学科分类号：

080502 ; 0817 ; 081705 ;

摘要：

Structural and compositional design of core-shell structure is an effective strategy towards enhanced catalysis.Herein,amorphous MnO2nanosheets and K+-intercalated layered MnO2nanosheets are controllably assembled over Fe2O3spindles,in which the MnO2nanosheets are perpendicularly anchored to the surface of Fe2O3.Such a core shell structure contributes to a high specific surface area and abundant pore channels on the surface of catalysts.In addition,the existence of K+provides large numbers of basic sites and restrains the formation of unpleasant(Fe1-xMnx)3O4.Benefiting from the merits in structure and composition,CO adsorption is enhanced and remaining time of intermediates is prolonged on the surfaces of catalysts during the Fischer–Tropsch synthesis(FTS),facilitating to the formation of active iron carbides and C–C coupling reactions.Resultantly,the Fe2O3@K+-Mn O2shows both a high CO conversion of 82.3%and a high C5+selectivity of 73.1%.The present study provides structural and compositional rationales on design high-performance catalysts towards FTS.

引用

页码：118 / 127

页数：10

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