Fischer-Tropsch synthesis over alumina-supported cobalt catalysts: effects of different spray temperature of aluminum slurry

被引：0

作者：

Liu, Yan ^{[1
]}

Jia, Litao ^{[1
]}

Hou, Bo ^{[1
]}

Li, Debao ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China

来源：

CANADIAN JOURNAL OF CHEMISTRY | 2016年 / 94卷 / 05期

基金：

中国国家自然科学基金;

关键词：

alumina; cobalt-based catalyst; pore distribution; cobalt particle size; spray drying; DEACTIVATION; CO/AL2O3; CO; GAMMA-AL2O3; OXIDATION; PHASE; REDUCIBILITY; SELECTIVITY; ACTIVATION; STABILITY;

D O I：

10.1139/cjc-2015-0499

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Aluminum slurry was obtained by precipitating Al(NO3)(3)center dot 9H(2)O and ammonium carbonate, and the slurry was dried by adopting spray means. The effects of different spray temperature on the as-synthesised aluminum precursors, calcined alumina, and the supported cobalt catalysts were investigated by the characterizations of SEM, XRD, TG-DTA, H-2-TPD, H-2-TPR, etc., and the activity and stability of the as-prepared catalysts for Fischer-Tropsch synthesis were also studied. It indicated that the aluminum precursor spray dried at 250 degrees C exhibited homogeneous microspheres, the calcined alumina exhibited single-particle size distribution and monomodal pore distribution, and the corresponding supported cobalt catalyst possessed proper cobalt particles (6.4 nm), which was benefitial for acquiring a high conversion rate (the turnover frequency is 17.2 x 10(-3)/s) and excellent stability (the deactivation rate is 0.31%) for Fischer-Tropsch synthesis.

引用

页码：515 / 522

页数：8

共 42 条

[31] Preparation and characterisation of spherical CO/SiO2 model catalysts with well-defined nano-sized cobalt crystallites and a comparison of their stability against oxidation with water [J].