Direct conversion of syngas to isoparaffins over hierarchical beta zeolite supported cobalt catalyst for Fischer-Tropsch synthesis

被引：24
|
作者：
Li, Hansheng [1 ,2 ]
Hou, Bo [1 ]
Wang, Jungang [1 ]
Qin, Chuan [1 ,2 ]
Zhong, Min [1 ,2 ]
Huang, Xin [1 ]
Jia, Litao [1 ]
Li, Debao [1 ]
机构：
[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
MOLECULAR CATALYSIS | 2018年 / 459卷
基金：
中国国家自然科学基金;
关键词：
Fischer-Tropsch; Synthesis; Isoparaffins selectivity; Internal diffusion limitations; Cobalt; SHELL-STRUCTURED CATALYSTS; SIZE MESOPOROUS ZIRCONIA; ONE-STEP SYNTHESIS; PARTICLE-SIZE; PORE-SIZE; RUTHENIUM NANOPARTICLES; C-5-C-11; ISOPARAFFINS; DIFFUSION LIMITATIONS; SYNTHESIS GAS; PERFORMANCE;
D O I：
10.1016/j.mcat.2018.08.002
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：
A hierarchical micro-meso-macroporous Beta zeolite (HB) was developed by a steam-assisted crystallization method and was employed for cobalt Fischer-Tropsch synthesis. Meso-macroporous silica (HS), alumina modified meso-macroporous silica (HAS) and conventional Beta zeolite (CB) were used for comparison. Structural characterization indicated that the as-synthesized HB exhibited nanosized Beta zeolite crystallites and a hierarchical micro-meso-macroporous structure. The HB supported catalyst showed very high isoparaffins selectivity because of the isomerization reaction at the strong acidic sites of the Beta zeolite, while due to its good macroporous structure, which is in favor of reducing the internal diffusion limitations, the methane selectivity was kept as low as HAS supported catalysts. In this paper, we use large particle catalysts for evaluation, which are very close to industrial condition. And the conclusions obtained may be very important for the design of new Fischer-Tropsch catalysts.
引用
收藏
页码：106 / 112
页数：7
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