文献类型：期刊文献

英文题名：Kinetic study of higher alcohol synthesis directly from syngas over CoCu/SiO2 catalysts

作者：Su, Junjie[1];Mao, Wei[1];Xu, Xin-Chao[1];Yang, Zhen[1];Li, Honglin[1];Xu, Jing[1];Han, Yi-Fan[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2014

卷号：60

期号：5

起止页码：1797

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20141517568906);WOS:【SCI-EXPANDED(收录号:WOS:000333885900020)】；

基金：The authors are grateful to the support from the National Science Foundation (21176071, 21106041, 21273070), the Program for New Century Excellent Talents in university (NCET-12-0852), Science and Technology Commission of Shanghai Municipality (11JC1402700), Innovation Program of Shanghai Municipal Education Commission (11ZZ52, 12ZZ051), Shanghai Natural Science Foundation (11ZR1408400), Fundamental Research Funds for the Central Universities and the Chinese Education Ministry 111 project (B08021).

语种：英文

外文关键词：bimetallic CoCu catalysts; higher alcohol synthesis; intrinsic kinetics; syngas; surface alloy

摘要：Higher alcohol synthesis (HAS) directly from syngas is one of the most promising approaches for utilizing nonoil resources cleanly and efficiently. A series of bimetallic CoCu catalysts with different Co/Cu ratios were prepared using a SiO2 support. The structure of Cu modified Co catalysts was characterized using HRTEM, in/ex situ X-ray diffraction, and temperature-programmed reduction. It was evidenced that nanoscale metal particles were formed and the reduction of Co oxide at above 673 K. Meanwhile, the interaction between Co and Cu on the surface was assumed to be responsible for the enhanced selectivity to HAS. The intrinsic kinetics for this reaction was performed over a CoCu/SiO2 catalyst under realistic conditions. The kinetic parameters, including apparent activation energies and reaction orders, were calculated through power-law models. With the combination of chain growth probability and kinetics, the effect of temperatures on the reaction mechanism and the Cu promotional effects on Co catalysts were elaborated. (c) 2014 American Institute of Chemical Engineers AIChE J, 60: 1797-1809, 2014