Studies on KIT-6 Supported Cobalt Catalyst for Fischer-Tropsch Synthesis

被引:26
作者
Gnanamani, Muthu Kumaran [1 ]
Jacobs, Gary [1 ]
Graham, Uschi M. [1 ]
Ma, Wenping [1 ]
Pendyala, Venkat Ramana Rao [1 ]
Ribeiro, Mauro [1 ]
Davis, Burtron H. [1 ]
机构
[1] Univ Kentucky, Ctr Appl Energy Res, Lexington, KY 40511 USA
关键词
Fischer-Tropsch synthesis; KIT-6; Cobalt; Mesoporous silica; Catalyst; MESOPOROUS SILICA; MOLECULAR-SIEVES; DISPERSION; REDUCIBILITY; RUTHENIUM; BEHAVIOR;
D O I
10.1007/s10562-009-0213-7
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
KIT-6 molecular sieve was used as a support to prepare cobalt catalyst for Fischer-Tropsch synthesis (FTS) using an incipient wetness impregnation method to produce cobalt loadings of 15 and 25 wt%. The catalysts were characterized by BET surface area, X-ray diffraction, scanning transmission election microscopy (STEM), extended X-ray absorption fine spectroscopy and X-ray absorption near edge spectroscopy. The catalytic properties for FTS were evaluated using a 1L CSTR reactor. XRD, pore size distribution, and STEM analysis indicate that the KIT-6 mesostructure remains stable during and after cobalt impregnation and tends to form smaller cobalt particles, probably located inside the mesopores. The mesoporous KIT-6 exhibited a slightly higher cobalt dispersion compared to amorphous SiO2 supported catalyst. With the higher Co loading (25 wt%) on KIT-6, partial structural collapse was observed after the FTS reaction. Compared to an amorphous SiO2 supported cobalt catalyst, KIT-6 supported cobalt catalyst displayed higher methane selectivity at a similar Co loading, likely due to diffusion effects.
引用
收藏
页码:37 / 44
页数:8
相关论文
共 27 条
[1]  
ARCON I, 2001, J SYNCHROTRON RADIAT, V8, P106
[2]   Characterization and catalytic behavior of Co/SiO2 catalysts:: Influence of dispersion in the Fischer-Tropsch reaction [J].
Barbier, A ;
Tuel, A ;
Arcon, I ;
Kodre, A ;
Martin, GA .
JOURNAL OF CATALYSIS, 2001, 200 (01) :106-116
[3]  
BART JCJ, 1986, ADV CATAL, V34, P203
[5]  
ENGLISCH M, 1996, XRAY ABSORPTION FINE
[6]   BIMETALLIC SYNERGY IN COBALT RUTHENIUM FISCHER-TROPSCH SYNTHESIS CATALYSTS [J].
IGLESIA, E ;
SOLED, SL ;
FIATO, RA ;
VIA, GH .
JOURNAL OF CATALYSIS, 1993, 143 (02) :345-368
[7]   FISCHER-TROPSCH SYNTHESIS ON COBALT AND RUTHENIUM - METAL DISPERSION AND SUPPORT EFFECTS ON REACTION-RATE AND SELECTIVITY [J].
IGLESIA, E ;
SOLED, SL ;
FIATO, RA .
JOURNAL OF CATALYSIS, 1992, 137 (01) :212-224
[8]   SYNTHESIS OF HIGHLY ORDERED MESOPOROUS MATERIALS FROM A LAYERED POLYSILICATE [J].
INAGAKI, S ;
FUKUSHIMA, Y ;
KURODA, K .
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1993, (08) :680-682
[9]   Fischer-Tropsch synthesis: support, loading, and promoter effects on the reducibility of cobalt catalysts [J].
Jacobs, G ;
Das, TK ;
Zhang, YQ ;
Li, JL ;
Racoillet, G ;
Davis, BH .
APPLIED CATALYSIS A-GENERAL, 2002, 233 (1-2) :263-281
[10]   Fischer-Tropsch synthesis: Temperature programmed EXAFS/XANES investigation of the influence of support type, cobalt loading, and noble metal promoter addition to the reduction behavior of cobalt oxide particles [J].
Jacobs, Gary ;
Ji, Yaying ;
Davis, Burtron H. ;
Cronauer, Donald ;
Kropf, A. Jeremy ;
Marshall, Christopher L. .
APPLIED CATALYSIS A-GENERAL, 2007, 333 (02) :177-191