正庚烷在β沸石负载碳化钼催化剂上的异构化研究

利用程序升温还原法制备了β沸石负载碳化钼催化剂。XRD表征显示，利用正戊烷作为碳源得到了对异构化具有活性的βMo2C。以正庚烷为模型反应物，在连续流动固定床反应装置上考察了温度、压力、空速和氢烃比对βMo2C/β沸石催化剂临氢异构化反应性能的影响。获得了β沸石负载碳化钼催化剂上正庚烷异构化的最佳反应条件温度270℃～275℃，压力1.0MPa～1.5MPa，体积空速1.0h－1，氢烃体积比200∶1。在最佳条件下反应物转化率为82%，选择性和异构产物收率分别达到71%和58%。

Study on n-heptane isomerization on β zeolite supported molybdenum carbide catalyst

β Zeolite supported molybdenum carbide catalyst has been prepared by temperature programmed reduction with n-pentane as a source of carburization, and characterized by XRD. The influences of reaction temperature, pressure, space velocity and the ratio of hydrogen to hydrocarbon on the catalytic performance for hydroisomerization over βMo2C/β zelite have been investigated in a fixed bed down flow reactor using n-heptane as a model reactant. The optimum conditions for the isomerization of n-heptane were 270℃～275℃, 1.0MPa～1.5MPa, LHSV 1.0h－1and the hydrogen to hydrocarbon ratio (Volume Ratio) 200∶1. The results of the reaction showed that the selectivity and yield of isomers reached to 71% and 58%, respectively, with the n-heptane conversion of 82% in the optimum conditions.