VO_x/SiO_2催化剂上正丁烷催化脱氢制正丁烯  

n-Butane catalytic dehydrogenation to butene on VO_x/SiO_2 catalysts

作　　者：胥月兵[1] 陆江银[1] 钟梅[1] 王吉德[1] 

机构地区：[1]新疆大学石油天然气精细化工教育部重点实验室,新疆乌鲁木齐830046

出　　处：《天然气化工—C1化学与化工》2008年第3期26-30,共5页Natural Gas Chemical Industry

基　　金：新疆大学博士科研启动基金(BS060101);教育部新世纪优秀人才支持计划(NCET-04-0987)

摘　　要：在微型固定床反应器上考察了催化剂的焙烧温度、钒氧化物负载量、反应温度、H2/n-C4H10比及空速对负载法制备的VOx/SiO2催化剂上正丁烷催化脱氢制正丁烯的反应性能的影响。结果表明:V2O5负载量为12%(质量分数)、焙烧温度为550℃为最佳催化剂制备条件,反应温度在590～600℃,氢烃摩尔比为1～2及空速在(2～4)×103ml/(h·g)范围可获得最佳正丁烯收率30.6%;正丁烯中1-丁烯及2-丁烯产物分布受反应温度影响较大,而几乎不受氢烃比和空速的影响。The effects of catalyst calcination temperature, V2O5 loading, reaction temperature, molar ratio of hydrogen to n-butane and weight hourly space velocity（WHSV） on n-butane catalytic dehydrogenation to n-butene over VOx/SiO2 catalysts prepared by impregnation were investigated in a micro fixed-bed reactor. The optimum catalyst was the one with V2O5 loading mass fraction of 12% and calcined at 550 ℃, and the highest n-butene yield could be up to 30.6% when the reaction temperature was between 590- 600 ℃, the molar ratio of hydrogen to n-butane was between 1~2, and the WHSV was between 2×10^3-4×10^3ml·h^-1·gcat^-1. The ratio of 1-butene, cis-2-butene and trans-2-butene in product was influenced mainly by reaction temperature, hardly by the feed ratio of hydrogen to n-butane and WHSV.

关 键 词：VOx/SiO2催化剂 正丁烷 催化脱氢 正丁烯 

分 类 号：TQ426[化学工程]