文献类型：期刊文献

中文题名：Fabrication of K-promoted iron/carbon nanotubes composite catalysts for the Fischer–Tropsch synthesis of lower olefins

英文题名：Fabrication of K-promoted iron/carbon nanotubes composite catalysts for the Fischer–Tropsch synthesis of lower olefins

作者：Xuezhi Duan[1];Di Wang[1,2];Gang Qian[1];John C.Walmsley[3];Anders Holmen[2];De Chen[2];Xinggui Zhou[1]

机构：[1]State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;[2]Department of Chemical Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway;[3]SINTEF Materials and Chemistry, 7465 Trondheim, Norway

年份：2016

卷号：25

期号：2

起止页码：309

中文期刊名：Journal of Energy Chemistry

外文期刊名：能源化学（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2015_2016】；

基金：supported by the China Scholarship Council (CSC) for the research at Norwegian University of Science and Technology;supported by the Natural Science Foundation of China (21306046);the Open Project of State Key Laboratory of Chemical Engineering (SKL-Che-15C03);the Fundamental Research Funds for the Central Universities (WA1514013);the 111 Project of Ministry of Education of China (B08021)

语种：英文

中文关键词：Fischer–Tropsch synthesis Lower olefins Iron catalyst Potassium promoter Carbon nanotubes

外文关键词：Fischer–Tropsch synthesis Lower olefins Iron catalyst Potassium promoter Carbon nanotubes

摘要：K-promoted iron/carbon nanotubes composite（i.e., Fe K-OX） was prepared by a redox reaction between carbon nanotubes and K2FeO4followed by thermal treatments on a purpose as the Fischer–Tropsch catalyst for the direct conversion of syngas to lower olefins. Its catalytic behaviors were compared with those of the other two Fe-IM and Fe K-IM catalysts prepared by impregnation method followed by thermal treatments. The novel Fe K-OX composite catalyst is found to exhibit higher hydrocarbon selectivity,lower olefins selectivity and chain growth probability as well as better stability. The catalyst structureperformance relationship has been established using multiple techniques including XRD, Raman, TEM and EDS elemental mapping. In addition, effects of additional potassium into the Fe K-OX composite catalyst on the FTO performance were also investigated and discussed. Additional potassium promoters further endow the catalysts with higher yield of lower olefins. These results demonstrated that the introduction method of promoters and iron species plays a crucial role in the design and fabrication of highly active,selective and stable iron-based composite catalysts for the FTO reaction.
K-promoted iron/carbon nanotubes composite（i.e., Fe K-OX） was prepared by a redox reaction between carbon nanotubes and K2FeO4followed by thermal treatments on a purpose as the Fischer–Tropsch catalyst for the direct conversion of syngas to lower olefins. Its catalytic behaviors were compared with those of the other two Fe-IM and Fe K-IM catalysts prepared by impregnation method followed by thermal treatments. The novel Fe K-OX composite catalyst is found to exhibit higher hydrocarbon selectivity,lower olefins selectivity and chain growth probability as well as better stability. The catalyst structureperformance relationship has been established using multiple techniques including XRD, Raman, TEM and EDS elemental mapping. In addition, effects of additional potassium into the Fe K-OX composite catalyst on the FTO performance were also investigated and discussed. Additional potassium promoters further endow the catalysts with higher yield of lower olefins. These results demonstrated that the introduction method of promoters and iron species plays a crucial role in the design and fabrication of highly active,selective and stable iron-based composite catalysts for the FTO reaction.