摘要
采用溶胶凝胶法制备了TiO2-Al2O3复合载体,用分步浸渍法制备了NiO/WO3/TiO2-Al2O3催化剂。在常压连续流动固定床反应器上考察了NiO/WO3/TiO2-Al2O3对正庚烷临氢异构化反应的催化性能。研究了催化剂中WO3含量、Ni含量、焙烧温度和还原温度及催化反应温度对临氢异构化反应的影响。采用XRD和BET方法对催化剂进行了表征。结果表明,当w(WO3)=25%、w(Ni)=10%时,所制备的NiO/WO3/TiO2-Al2O3催化剂对正庚烷异构化反应的催化性能最好,活性可达15.50%,选择性可达84.06%。
TiO2-Al2O3 catalyst support was prepared by the sol-gel method and NiO/WO3 /TiO2-Al2O3 catalyst was prepared by stepwise impregnation.Hydroisomerization of n-heptane over the NiO/WO3 /TiO2-Al2 O3 catalyst was investigated in a continuous flow fixed-bed reactor under atmospheric pressure.The catalysts were characterized using XRD and BET surface area.The effects of WO3 content,Ni content,calcination temperature,reduction temperature,reaction temperature on the catalytic performance were studied systematically.The result showed that when the mass fraction of WO3 and Ni in the catalyst was 25% and 10%,respectively,the highest catalytic activity of NiO/WO3 /TiO2-Al2O3 could be achieved.The conversion of n-heptane is 15.50% while the isomerization selectivity of i-heptane can reach 84.06%.
出处
《应用化学》
CAS
CSCD
北大核心
2010年第10期1182-1187,共6页
Chinese Journal of Applied Chemistry
基金
黑龙江省科技攻关计划项目(GZ06A-401)
