介孔载体离子交换方式对其负载Pd-Pt催化剂加氢性能的影响  

EFFECT OF ION EXCHANGE METHOD OF MESOPOROUS SUPPORT ON HYDROGENATION ACTIVITY OF ITS SUPPORTED Pd-Pt CATALYSTS

作　　者：杜岩[1] 于万金[1] 李永丹[1] 

机构地区：[1]天津大学应用催化科学与工程天津市重点实验室,天津300072

出　　处：《石油学报（石油加工）》2007年第5期22-27,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(20425619)资助

摘　　要：制备了含有Y沸石次级结构单元的Y-MCM-41,并对其进行离子交换处理。以处理后的Y-MCM-41为载体,制备了Pd-Pt负载型加氢催化剂。采用XRD、FT-IR、程序升温还原(TPR)、NH3的程序升温脱附(NH3-TPD)、偏振塞曼原子吸收光谱(AAS)对催化剂进行表征,并以30%四氢萘的十三烷溶液为加氢模型反应物,考察了载体的离子交换方式对其负载的Pd-Pt催化剂加氢性能的影响。结果表明,采用不同离子交换处理的载体所制备的催化剂,其金属的负载量、金属与载体间的相互作用存在差别,从而影响催化剂的加氢活性和选择性。在金属中心与载体酸中心基本匹配的情况下,较大的酸量对加氢活性有利。Y-MCM-41 containing secondary building units of Y zeolite was prepared and then treated by ion exchange method. The treated Y-MCM-41 was used as a support to prepare supported Pd-Pt catalysts. The catalysts were characterized by XRD, FT-IR, temperature programmed reduction （TPR）, temperature programmed desorption of NH3 （NH3-TPD） and atomic absorption spectroscopy （AAS）. The effect of ion exchange of Y-MCM-41 on the hydrogenation activity of Pd-Pt/Y-MCM-41 in tetralin hydrogenation reaction was examined with 30% tetralin-tridecane solution as the model reactant. It was found that the Pd-Pt/Y-MCM-41 catalysts prepared with the different ion exchanged Y-MCM-41 possessed different final metal content, interaction between metal and support, and hydrogenation activity. For the catalyst with a metal-acid balance, a higher amount of acid sites was helpful for the hydrogenation activity.

关 键 词：Y沸石 次级结构单元 介孔材料 离子交换 四氢萘加氢 

分 类 号：TQ032[化学工程]