CO hydrogenation to C2-oxygenates over Rh-Mn-Li/SiO2 catalyst:: Effects of support pretreatment with nC1-C5 alcohols

被引：47
作者：
Jiang, Dahao [1 ,2 ]
Ding, Yunjie [1 ]
Pan, Zhendong [1 ,2 ]
Chen, Weimiao [1 ]
Luo, Hongyuan [1 ]
机构：
[1] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
来源：
CATALYSIS LETTERS | 2008年 / 121卷 / 3-4期
关键词：
nC(1)-C-5 alcohols; support pretreatment; Rh-based catalyst; C-2-oxygenates; CO hydrogenation;
D O I：
10.1007/s10562-007-9322-3
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effects of support pretreatment with nC(1)-C-5 alcohols on the performance of Rh-Mn-Li/SiO2 catalyst in the synthesis of C-2-oxygenates from syngas have been investigated by CO hydrogenation reaction, transmission electron microscopy (TEM), pulse adsorption of CO and H-2, and Fourier Transform infrared (FT-IR) spectroscopy. The catalysts prepared from the pretreated silica supports exhibited higher space time yields of C-2-oxygenates (STYC2-oxy) and selectivities towards C-2-oxygenates (SC2-oxy) than that prepared from the untreated silica support. The enhancement in the hydrophobicity of the pretreated silica supports would be favorable for increasing Rh dispersion and ratio of Rh+/Rh-0 sites, therefore increasing the number of active sites, especially the active sites for CO insertion. Such variations are responsible for the improvements in the catalytic performance of the Rh-Mn-Li/SiO2 catalyst.
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页码：241 / 246
页数：6
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