CO+H_2经F-T反应途径选择性合成汽油馏分异构烷烃  

Study on selective synthesis of gasoline-range iso-paraffins from CO + H_2 via Fischer-Tropsch route

作　　者：胥娜[1,2] 郝青青[1,2] 赵天生[3] 刘昭铁[1,2] 吕剑[1] 刘忠文[1,2] 

机构地区：[1]应用表面与胶体化学教育部重点实验室,陕西西安710062 [2]陕西师范大学化学与材料科学学院,陕西西安710062 [3]宁夏大学能源化工自治区重点实验室,宁夏银川750021

出　　处：《工业催化》2009年第9期48-51,共4页Industrial Catalysis

基　　金：陕西省自然科学基础研究计划(2007B12);教育部留学回国人员科研启动基金;宁夏天然气转化重点实验室开放课题资助项目(2006001)

摘　　要：采用两段串联固定床反应器,以Co/SiO_2作为F-T合成催化剂,以β分子筛负载金属作为加氢裂解/异构化催化剂,研究了从合成气经F-T反应途径一步法选择性合成汽油馏分异构烷烃的反应性能。结果表明,两段固定床系统的F-T合成产物主要为C_1～C_(10)烃,而且异构烷烃的选择性较高(I/C_4^+≈70%)。同时,钯盐前驱体对0.5%Pd/β的加氢裂解/异构化反应性能有很大影响。保持金属总负载质量分数为0.5%,在Pd/β中引入少量Pt或Ni,可以明显改善催化剂活性和稳定性。Selective synthesis of gasoline-range iso-paraffins from synthesis gas (CO + H_2,syngas) via Fischer-Tropsch (F-T) route was investigated in a consecutive dual reactor system,in which F-T reactions took place over Co/SiO_2 catalyst in the upper reactor and hydrocraking/isomerization of the F-T hydrocarbons occurred over metal-supported β zeolite catalyst in the lower reactor.High selectivity to isoparaffin (l/C_4^+ ≈70%) was obtained in the products,mainly C_1-C_(10) hydrocarbons.Precursors of the palladium salt for the preparation of 0.5% Pd/β had significant effect on behaviors of the catalyst for hydrocracking /isomerization reactions.Catalytic performance of the 0.5% Pd/ β catalyst for the titled reaction was obviously improved by substituting a small part of Pd with either Pt or Ni with total metal loadings remaining at 0.5%.

关 键 词：能源化学 异构烷烃 合成气 F-T合成 Β分子筛 双功能催化剂 

分 类 号：TQ529.2[化学工程—煤化学工程] TQ426.94