Mo_2C/SAPO-11催化剂上正己烷异构化反应研究  

STUDY ON THE ISOMERIZATION REACTION OF n-HEXANE OVER Mo_2C/SAPO-11 CATALYST

作　　者：孟禹[1] 谷峰[1] 王海彦[1] 常勇[1,2,3] 

机构地区：[1]辽宁石油石油化工大学,抚顺113001 [2]中国石油大学(华东)化学化工学院 [3]沈阳工业大学石油化工学院

出　　处：《石油炼制与化工》2009年第2期37-40,共4页Petroleum Processing and Petrochemicals

摘　　要：利用程序升温还原法以正己烷作为碳源制备了SAPO-11负载碳化钼催化剂。XRD分析表明,经氢气还原催化剂中的钼相已转变成具有异构化活性的β-Mo_2C。通过连续流动固定床反应装置,以正己烷为模型反应物,考察了反应温度、压力、空速和氢烃体积比对β-Mo_2C/SAPO-11催化剂临氢异构化反应性能的影响。结果表明,SAPO-11负载碳化钼催化剂上的正己烷异构化的最适宜反应条件为温度380℃、压力1.5 MPa、体积空速1.0h^(-1)、氢烃体积比200:1。在该条件下,当反应物转化率为82.19%时,异构物选择性和收率分别达到73.57%和60.47%。A Mo2C/SAPO-11 catalyst was prepared by temperature programming reduction method using n-hexane as the source of carburization. It was shown from the XRD patterns that through hydrogen reduction the molybdenum phase in catalyst was changed to β-Mo2C, which possessed good isomerization activity. The influences of reaction temperature, reaction pressure, space velocity and hydrogen to hydrocarbon ratio on the catalytic isomerization performance of β-Mo2C/SAPO-11 catalyst in the presence of hydrogen were investigated by a continuous fixed-bed reactor system using n-hexane as model feed. Results showed that under the optimum conditions of a reaction temperature of 380 ℃ ,a reaction pressure of 1.5 MPa,a LHSV of 1.0 h^-1 and hydrogen to hydrocarbon volume ratio of 200, the conversion of n-hexane reached 82.19% ;the selectivity and yield of isomers were 73.57% and 60.47%,respectively.

关 键 词：异构化 碳化钼 正己烷 SAPO-11 

分 类 号：TQ203.2[化学工程—有机化工]