改性β沸石负载碳化钼催化剂上正己烷的异构化  

Isomerization of n-Hexane on the Modification β-Zeolite Supported Molybdenum Carbide Catalyst

作　　者：谷峰[1] 孟禹[1] 王海彦[1] 魏民[1] 马骏[1] 施岩[1] 常勇[1,2,3] 

机构地区：[1]辽宁石油化工大学 [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：《石油与天然气化工》2009年第2期96-99,共4页Chemical engineering of oil & gas

基　　金：辽宁省教育厅科研项目(05L221)

摘　　要：本实验通过碱溶液适度处理β沸石来增大其孔径,制备了β沸石负载碳化钼催化剂。XRD、BET、FTIR分析表明,制备出了高比表面积大孔径的β沸石。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。以正己烷为模型反应物,考察了反应温度、压力、空速和氢烃比对β-Mo2C/β沸石催化剂临氢异构化反应性能的影响。结果显示,β沸石负载碳化钼催化剂上的正己烷异构化的最优反应条件为温度265℃,压力1.5MPa,体积空速1.0h-1,氢烃体积比200∶1。最优条件下当反应物转化率为80.97%时,选择性和异构物收率分别达到72.53%和58.73%。β-zeolite was processed with alkaline solution in order to increase its aperture dimensions, and β-zeolite supported molybdenum carbide catalyst had been prepared in this experiment. The XRD, BET and FTIR results showed that the β-zeolite of high surface areas and big aperture dimensions of β-zeolite was prepared. The XRD results showed that, the active component β-Mo2C was obtained by using n-hexane as a source of carburization. The influences of reaction temperature, pressure, space velocity and hydrogen to hydrocarbon ratio on the catalytic performance for hydroisomerization over β-Mo2C/β-zeolite had been investigated, using the n-hexane as the module reactant. The reaction results showed that the optimum conditions for the isomerization of n-hexane were reaction temperature 265℃, pressure 1.5 MPa, LHSV 1.0 h-1 and hydrogen to hydrocarbon ratio (v/v) 200∶1. The conversion of n-hexane reached 80.97%; the selectivity to isomers and the isomers yield were 72.53% and 58.73%, respectively.

关 键 词：异构化 碳化钼 正己烷 Β沸石 

分 类 号：TE621[石油与天然气工程—油气加工工程] O643.32[理学—物理化学]