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Higher alcohols synthesis from syngas over CoCu/SiO2 catalysts: Dynamic structure and the role of Cu
Su, JJ; Zhang, ZP; Fu, DL; Liu, D; Xu, XC; Shi, BF; Wang, X; Si, R; Jiang, Z; Xu, J; Han, YF; Han, YF (reprint author), E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China.
2016
Source PublicationJOURNAL OF CATALYSIS
ISSN0021-9517
Volume336Issue:-Pages:94—106
Subtype期刊文献
AbstractA comparative study of higher alcohols synthesis directly from syngas has been performed over monometallic Co and bimetallic CoCu/SiO2 catalysts. Particularly, the role of Cu on the origin. of active sites and reaction mechanism were investigated thoroughly using multiple techniques such as ex situ X-rays diffraction (XRD), X-ray absorption spectroscopy (XAS) and Raman spectroscopy. Reduction process of CoCu/SiO2 catalysts was also determined using in situ XRD and in situ Raman spectroscopy while the surface structure of reduced catalysts was detected by CO-DRIFTS. CoCu bimetallic particles covered by Cu atoms are responsible for alcohols synthesis. The intrinsic kinetics was performed over both catalysts under realistic reaction conditions. By comparing the kinetic parameters, including apparent activation energies and reaction orders, the promotional effects of Cu have been identified as: (1) weakening the CO/HCO dissociation and reducing the formation of CH species; (2) controlling surface Co ensemble size and inhibiting CHx insertion. (C) 2016 Elsevier Inc. All rights reserved.
KeywordFischer-tropsch Synthesis Methanol Synthesis Catalysts Supported Cobalt Catalysts Co Hydrogenation Synthesis Gas Cuco/sio2 Catalysts Ft-ir Mechanism Exafs Hydrocarbons
DOI10.1016/j.jcat.2016.01.015
Indexed BySCI
Language英语
WOS IDWOS:000371944100010
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/25741
Collection中科院上海应用物理研究所2011-2018年
Corresponding AuthorHan, YF (reprint author), E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China.
Recommended Citation
GB/T 7714
Su, JJ,Zhang, ZP,Fu, DL,et al. Higher alcohols synthesis from syngas over CoCu/SiO2 catalysts: Dynamic structure and the role of Cu[J]. JOURNAL OF CATALYSIS,2016,336(-):94—106.
APA Su, JJ.,Zhang, ZP.,Fu, DL.,Liu, D.,Xu, XC.,...&Han, YF .(2016).Higher alcohols synthesis from syngas over CoCu/SiO2 catalysts: Dynamic structure and the role of Cu.JOURNAL OF CATALYSIS,336(-),94—106.
MLA Su, JJ,et al."Higher alcohols synthesis from syngas over CoCu/SiO2 catalysts: Dynamic structure and the role of Cu".JOURNAL OF CATALYSIS 336.-(2016):94—106.
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