新型双孔F-T合成钴基催化剂的制备及其性能  

Preparation and Characterization of New Bimodal Porous Cobalt-based Catalyst for Fischer-Tropsch Synthesis

作　　者：纪任山[1] 肖翠微[1] 王乃继[1] 秦国彤[2] 

机构地区：[1]煤炭科学研究总院,北京100013 [2]北京航空航天大学化学与环境学院,北京100083

出　　处：《过程工程学报》2010年第2期379-384,共6页The Chinese Journal of Process Engineering

基　　金："十一五"国家科技支撑计划基金资助项目(编号:2006BAA01B01)

摘　　要：采用浸渍法制备了ZrO2改性的具有2种孔结构的硅胶催化剂载体,以其为基体制备了具有双孔结构的蛋壳型钴基催化剂,考察了其结构和催化性能.结果表明,双孔结构的载体和相应的催化剂具有更好的比表面性能,ZrO2改性的双孔载体有利于提高催化剂的分散程度、催化活性及C5+选择性.在温度250℃、压力2MPa、空速500h-1条件下,蛋壳型催化剂上CO转化率可达96.6%,C5+选择性为91.2%.Bimodal porous support was modified with ZrO2 sols introduced into bigger pores of SiO2 gel pellets directly,then a eggshell cobalt-based catalyst based on the support was prepared.The structure and reduction property of the catalyst were characterized.The pores of obtained supports and catalyst distributed distinctly as two kinds of main pores.The results show that the BET specific surface area and pore volume of bimodal porous support as well as catalyst were increased compared with the original silica gel and catalyst.Bimodal porous support with additive ZrO2 was beneficial to improve dispersing degree,activity and selectivity for C5＋ hydrocarbon of catalyst.The CO conversion rate reached 96.6%,and the selectivity for C5＋ hydrocarbon was 91.2% under the conditions of temperature 250 ℃,pressure 2 MPa,and air space speed 500 h-1.

关 键 词：双孔载体 F-T合成 钴基催化剂 蛋壳型 选择性 ZrO2改性 

分 类 号：TQ519[化学工程]