不同形状催化剂对戊烯骨架异构化性能的影响  

Effect of catalysts with different shapes on the isomerization of pentene skeleton

作　　者：刘宗俨 黄星亮[1] 董乐 田洪锋 彭文宇 高玥 代小平[1] Liu Zongyan;Huang Xingliang;Dong Le;Tian Hongfeng;Peng Wenyu;Gao Yue;Dai Xiaoping(College of Chemical Engineering and Environment,China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石油大学(北京)化学工程与环境学院

出　　处：《工业催化》2019年第11期44-49,共6页Industrial Catalysis

摘　　要：以实验室自制高硅铝比ZSM-35分子筛为原粉,采用挤条成型的方法制备直径分别为1.5 mm、3.5 mm,形状分别为圆柱形和三叶草的成型催化剂,通过颗粒强度测试仪、NH3-TPD、O2-TPO等手段对其进行表征。表征结果显示,随着直径的增大,催化剂强酸和弱酸的量减小,在同样直径下,三叶草催化剂的机械强度最强,堆密度相对较小,吸水率较高,酸性较强,抗积炭能力也较强,反应45 h后仍然具有较高的酸性。以工业醚后C5馏分为原料,研究不同形状催化剂的骨架异构化反应的性能,结果表明,圆柱形催化剂的初始转化率较高,但是催化剂失活速率较快。进入了稳定阶段之后,三叶草催化剂表现出了较高的稳定性,转化率平均比圆柱形催化剂高5%。Using ZSM-35 zeolite with high silica-aluminium ratio as raw material,the catalysts with different shapes of cylinder and clover and diameter of 1.5 mm,3.5 mm were prepared by extrusion method.The catalysts were characterized by particle strength tester,NH3-TPD and O2-TPO.The results showed that the amount of strong acid and weak acid decreased with the increase of diameter.Under the same diameter,the clover catalyst had the strongest mechanical strength,relatively small bulk density,high water absorption,strong acidity of fresh catalyst and catalyst after 45 h of reaction,strong carbon deposition resistance.Then,the skeleton isomerization performance of catalysts with different shapes was studied using C5 fraction of industrial ether as raw material.The results showed that the initial conversion of cylindrical catalyst was higher,but the deactivation rate of catalyst was faster.After entering the stable stage,the clover catalyst showed high stability,and the average conversion was 5% higher than that of the cylindrical catalyst.

关 键 词：催化化学 ZSM-35 催化剂形状 正戊烯 骨架异构 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]