Mo2C/SAPO-11催化剂上正己烷异构化反应研究

利用程序升温还原法制备了SAPO-11负载碳化钼催化剂。XRD分析表明，利用正己烷作为碳源得到了对异构化具有活性的β-Mo2C。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-Mo2C/SAPO-11催化剂临氢异构化反应性能的影响。结果显示，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1.5MPa，体积空速1.0h-1,氢烃体积比200:1。在适宜条件下反应物转化率为82.19%，异构物选择性和收率分别达到73.57%和60.47%。

STUDY ON THE ISOMERIZATION REACTION OF n-HEXANE OVER Mo2C/SAPO-11 CATALYST

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.