Co-Mo/γ-Al_2O_3加氢脱硫催化剂的吸附扩散性能  

Adsorption and Diffusion Performance of Co-Mo/γ-Al_2O_3 Hydrodesulfurization Catalyst

作　　者：段林海[1] 武玉叶[1] 杜美玉[1] 邵新超[1] 秦玉才[1,2] 宋丽娟[1] 

机构地区：[1]辽宁石油化工大学辽宁省石油化工重点实验室,辽宁抚顺113001 [2]中国石油大学化学工程学院,山东青岛266555

出　　处：《石油学报（石油加工）》2013年第1期35-39,共5页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(21076100)资助

摘　　要：用智能质量分析仪(Intelligent Gravimetric Analyser)测得了不同温度下异戊二烯(Isoprene)、戊烯-1(Pentene-1)及噻吩(Thiophene)在Co-Mo/γ-Al2O3选择性加氢脱硫催化剂上的吸附-脱附等温线及程序升温脱附曲线(TPD),并研究了三者在该催化剂上的扩散性能。结果表明,噻吩、异戊二烯、戊烯-1在Co-Mo/γ-Al2O3选择性加氢脱硫催化剂上的饱和吸附量依次降低;噻吩与该催化剂存在2种吸附作用,即物理吸附和化学吸附,化学吸附形成Co-Mo-S相,可有效地提高加氢脱硫催化剂的脱硫效果,而戊烯-1和异戊二烯在该催化剂上只存在1种弱吸附作用;3种吸附质中,戊烯-1相对扩散系数最大,噻吩和异戊二烯的相对扩散系数较小且相近。The adsorption-desorption isotherms and temperature-programmed desorption curves of thiophene, pentene-1 and isoprene on selective hydrodesulfurization catalyst Co-Mo/γ-Al_2O_3 were determined by intelligent gravimetric analyzer （IGA） at 335 K and 373 K, and their diffusion coefficients were also calculated. The results indicated that the saturated adsorption capacities of thiophene, isoprene and pentene-1 on Co-Mo/γ-Al_2O_3 decreased in turn. The temperature programmed desorption curves of thiophene showed that there were two kinds of adsorption, i.e. physical adsorption and chemical adsorption. And the phase of Co-Mo-S formed by chemical adsorption could effectively improve the desulfurization performance of Co-Mo/γ-Al_2O_3 catalysts. For pentene-1 and isoprene, there were only one weak adsorption between adsorbent and catalyst. Among the three adsorbents, the relative diffusion coefficient of pentene-1 on Co-Mo/γ-Al_2O_3 was the largest, while the relative diffusion coefficients of thiophene and isoprene were almost the same.

关 键 词：CO-MO Γ-AL2O3 选择性加氢脱硫 噻吩 戊烯-1 异戊二烯 吸附扩散 

分 类 号：TQ426.38[化学工程]