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

页码：302 / 307

页数：6

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