Effect of nanocrystalline χ-Al2O3 structure on the catalytic behavior of Co/Al2O3 in CO hydrogenation

被引：19
|
作者：
Chaitree, Wasu [1 ]
Jiemsirilers, Sirithan [2 ]
Mekasuwandumrong, Okorn [3 ]
Jongsomjit, Bunjerd [1 ]
Shotipruk, Artiwan [1 ]
Panpranot, Joongjai [1 ]
机构：
[1] Chulalongkorn Univ, Fac Engn, Dept Chem Engn, Bangkok 10330, Thailand
[2] Chulalongkorn Univ, Fac Sci, Dept Mat Sci, Bangkok 10330, Thailand
[3] Silpakorn Univ, Fac Engn & Ind Technol, Dept Chem Engn, Nakhon Pathom 73000, Thailand
来源：
CATALYSIS TODAY | 2011年 / 164卷 / 01期
关键词：
chi Al2O3; Cobalt catalyst; CO hydrogenation; Solvothermal; Gibbsite; FISCHER-TROPSCH CATALYSTS; NI-MODIFIED ALPHA-AL2O3; FINE ALUMINA POWDERS; SOL-GEL; THERMAL-DECOMPOSITION; COBALT; PERFORMANCE; AL2O3; PD/ALPHA-AL2O3; ISOPROPOXIDE;
D O I：
10.1016/j.cattod.2010.11.004
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
In the present study, nanocrystalline chi-Al2O3 were prepared by thermal decomposition of fine gibbsite (chi-GB) and solvothermal method (chi-SV) and employed as supports for preparation of 20 wt% Co/Al2O3 catalysts. As compared to the use of gamma-Al2O3 with similar BET surface area, Co dispersion and CO hydrogenation activity were higher on the nanocrystalline chi-Al2O3 supported Co catalysts. The transmission electron microscopy (TEM) results revealed that the wrinkled sheets-like structure of gamma-Al2O3 was completely destroyed after CO hydrogenation for 6 h whereas the spherical particles of chi-SV and plate-like structure of chi-GB were maintained. The H-2-temperature program reduction (H-2-TPR) also revealed a stronger interaction between cobalt and alumina supports for the Co/chi-Al2O3 catalysts. (C) 2010 Elsevier B. V. All rights reserved.
引用
收藏
页码：302 / 307
页数：6
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