文献类型：期刊文献

中文题名：镁铝尖晶石的制备及其催化降烯烃性能研究

英文题名：Study on preparation of magnesia-alumina spinel additive and its performances of catalytic olefin reduction

作者：任彦瑾[1];施力[1]

机构：[1]华东理工大学化工学院,上海200237

年份：2008

卷号：40

期号：1

起止页码：17

中文期刊名：无机盐工业

外文期刊名：Inorganic Chemicals Industry

收录：CSTPCD;;北大核心:【北大核心2004】；

语种：中文

中文关键词：溶胶-凝胶;镁铝尖晶石;助剂;降烯烃;氢转移

外文关键词：sol - gel; magnesia - alumina spinel ; additive ; olefin reducing ; hydrogen migration

摘要：采用溶胶-凝胶法制备出一种可以降低催化裂化(FCC)汽油烯烃含量的镁铝尖晶石催化助剂,在小型固定床反应装置上考察了其催化降烯烃效果,并对镁铝尖晶石的制备条件和不同镁铝的物质的量比对降烯烃效果的影响进行了研究,对助剂的催化降烯烃机理进行了分析。实验结果表明,制备温度为80℃,镁铝的物质的量比为1∶1时,助剂可将烯烃的体积分数降低20%以上。助剂的降烯烃活性主要是晶胞常数最大的MgAl2O4.MgO尖晶石促进了氢转移反应。
Magnesia - alumina spinel additives for FCC process, were prepared by sol - gel method. Test were carfled out in a fix bed reactor to observe the effect of olefin reduction in FCC gasoline, and the influence of preparation temperature and Mg/Al amount - of - substance ratio were studied as well. Resuhs indicated that the additives prepared at 80 ℃ and having a Mg/Al amount - of - substance ratio of 1.0 showed the best reaction activity,the olefin - reducing rate was over 20% in FCC gasoline. The reaction mechanism was also studied. XRD resuhs showed that MgAl2O4· MgO spinel could improve hydrogen migration reaction activity.