Effect Of Preparation Method of Pd/Al2O3 on the Hydrogenation Reactivity

Tang Bohejin, Lv Renqing, Xiang Shouhe*
(Institute of New Catalytic Materials Science, College of Chemistry, Nankai University, Tianjin, 300071)

Abstract The catalysts were prepared respectively by the methods of loading nano-grade Pd powder, chemical reduction sediment and conventional chemical impregnation. Using one-stage selective hydrogenation of cracking gasoline as the objective reaction , the activity and selectivity of different catalysts were investigated in this paper. The results showed that the nano-Pd/Al2O3 catalyst and non-crystalline Pd-B/Al2O3 catalyst are superior to the Pd/Al2O3 catalyst prepared by the conventional chemical impregnation method in the terms of activity and selectivity. Based on the analytical results of various instruments including TEM, SEM, XRD, XPS and TPR, the relationship of catalytic reactivity and the structure of catalyst are also discussed in this paper.
Key words Nano-Pd/Al2O3 catalyst, Pd-B/Al2O3, Non-crystalline alloy, One-stage hydrogenation of cracking gasoline

　

Pd/Al2O3的制备方法对加氢反应性能的影响

唐博合金 吕仁庆 项寿鹤*
(南开大学化学学院新催化材料科学研究所 天津 300071)

摘要 本文通过纳米钯粉加载法、化学还原沉积法、常规化学浸渍法制备的Pd/Al2O3催化剂，以裂解汽油一段加氢为目标反应，考察了上述催化剂的活性和选择性。研究表明，纳米Pd/Al2O3、非晶态Pd-B/Al2O3的催化活性和选择性均优于常规化学浸渍法制备的Pd/Al2O3催化剂。结合透射电镜(TEM)，扫描电镜(SEM)，X射线衍射(XRD)，X光电子能谱(XPS)，程序升温还原(TPR)等表征手段，讨论了催化性能与催化剂结构的关系。
关键词 纳米Pd/Al2O3催化剂 Pd-B/Al2O3 非晶态合金 裂解汽油一段加氢

唐博合金 男，39岁，博士生，现从事催化研究。 *联系人，E-mail:bohejin2002@yahoo.com
教育部南开大学天津大学科技合作基金资助项目

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