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题名:
Higher alcohols synthesis from syngas over CoCu/SiO2 catalysts: Dynamic structure and the role of Cu
作者: Su, JJ; Zhang, ZP; Fu, DL; Liu, D; Xu, XC; Shi, BF; Wang, X; Si, R; Jiang, Z; Xu, J; Han, YF
刊名: JOURNAL OF CATALYSIS
出版日期: 2016
卷号: 336, 期号:-, 页码:94—106
关键词: FISCHER-TROPSCH SYNTHESIS ; METHANOL SYNTHESIS CATALYSTS ; SUPPORTED COBALT CATALYSTS ; CO HYDROGENATION ; SYNTHESIS GAS ; CUCO/SIO2 CATALYSTS ; FT-IR ; MECHANISM ; EXAFS ; HYDROCARBONS
DOI: 10.1016/j.jcat.2016.01.015
通讯作者: Han, YF (reprint author), E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China.
文章类型: 期刊文献
英文摘要: A 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.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000371944100010
ISSN号: 0021-9517
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/25741
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
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,2016-01-01,336(-):94—106.
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文件名: Higher alcohols synthesis from syngas over CoCuSiO2 catalysts Dynamic structure and the role of Cu.pdf
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