文献类型：期刊文献

英文题名：Structure evolution of spinel Fe-MII (M=Mn, Fe, Co, Ni) ferrite in CO hydrogeneration

作者：Shi, Bianfang[1,2];Zhang, Zhengpai[1];Zha, Binbin[1];Liu, Da[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Instrument Anal Ctr 985, Shanghai 200237, Peoples R China

年份：2018

卷号：456

起止页码：31

外文期刊名：MOLECULAR CATALYSIS

收录：;EI(收录号：20182705407491);WOS:【SCI-EXPANDED(收录号:WOS:000442710900004)】；

基金：The authors are grateful to the support from the National Science Foundation (21406062), the Fundamental Research Funds for the Central Universities (22A201514007). We would like to thank LetPub (www.letpub.com) for providing linguistic assistance during the preparation of this manuscript.

语种：英文

外文关键词：CO hydrogeneration; Fischer-Tropsch synthesis; Syngas; Ferrite

摘要：The CO hydrogeneration via the Fischer-Tropsch reaction (FTO) has been carried out over spinel bimetallic Fe-M-II (M=Fe,Mn,Co,Ni) ferrite. The catalytic performance shows that Fe-Mn ferrite has the highest lower olefin selectivity of 54.5%, while Fe-Ni ferrite has the highest CH4 selectivity. The initial structure of the ferrite is characterized by scanning electron microscopy, energy-dispersive spectrometry, X-ray diffraction (XRD), and Raman spectroscopy. The structure evolution was also characterized by in situ XRD. The results revealed that the doping of a second metal decreases the grain size and microsphere size. Also, the doping of Mn promotes the reduction of MnxFe3-xO4 phase to MnxFe1-xO phase; however, further reduction of Fe2+ in the MnxFe1-xO phase is inhibited, while the doping of Co and Ni favors the reduction of MnxFe3-xO4 to alloy phase and metal phase. chi-Fe5C2 phase was found for all the spent catalysts, a small epsilon-Fe2C phase was also detected from spent Fe-Mn ferrite, and theta-Fe3C determined to be the principle carbide for the spent Fe-Co sample.