Ni-WO_x催化剂上正辛烷加氢异构化反应性能的研究  

Study on hydroisomerization of n-octane over Ni-WO_x catalyst

作　　者：汪颖军[1] 孙丽丽[1] 李长海[1] 

机构地区：[1]大庆石油学院化学化工学院,黑龙江大庆163318

出　　处：《化工科技》2007年第5期20-24,共5页Science & Technology in Chemical Industry

基　　金：黑龙江省科技攻关项目(GZ06A401)

摘　　要：采用浸渍法制备Ni-WOx催化剂,在常压连续流动固定床反应器上考察了Ni-WOx催化剂上正辛烷加氢异构化的催化性能。讨论了焙烧温度、Ni的含量、还原条件和反应条件对催化剂性能的影响,对Ni-WOx催化剂进行了XRD和BET表征。实验结果表明,在Ni-WOx催化剂上,焙烧温度为800℃,还原温度为525℃,反应温度为275℃,Ni-WOx催化剂对正辛烷异构化反应的转化率达到58.17%,同时其异构化选择性达到87.33%。通过XRD表征推测催化剂的活性相主要为WO2,正辛烷在Ni-WOx催化剂上是按照传统的双功能机理进行反应的。Hydroisomerization of n-octane over Ni-WOx catalyst was investigated in a continuous flow fixed-bed reactor under atmospheric pressure. The catalyst was prepared by impregnation. Effects of catalyst calcinations tempreture, Ni content in the catalyst, reduction and reaction conditions on conversion of n-octane and isomerization selectivity to i-octane were studied. The Ni-WOx catalysts were characterized by means of XRD and BET. When calcinations temperature is at 800 ℃, mass fraction of Ni 2% and reduction temperature at 525 ℃ ,the conversion of n-octane and isomerization selectivity to i-octane can reach 58.17 % and 87.33 %, correspondingly. Through XRD characterization we expected that the active component of the catalysts is mainly WO2. Catalytic behavior of Ni-WOx in hydroisomerization of n-octane can be explained by bifunctional mechanism.

关 键 词：氧化钨 催化刺 正辛烷 加氢异构化 焙烧温度 

分 类 号：TQ426.95[化学工程]