氧化铝孔结构特征对Pd基催化剂性能的影响  

Influences of Alumina Pore Structure Character on Properties of Pd-Based Catalyst

作　　者：张振强[1] 桓源峰[2,3] 贺小昆[2,3] 赵云昆 段春坤 

机构地区：[1]昆明贵金属研究所,云南昆明650106 [2]昆明贵研催化剂有限责任公司,云南昆明650106 [3]昆明理工大学,云南昆明650093

出　　处：《稀有金属材料与工程》2011年第1期74-79,共6页Rare Metal Materials and Engineering

基　　金：云南省重点产品创新工程(20081A013);云南省重点新产品开发计划(2007BA005)资助

摘　　要：考察2种γ-Al2O3改性前后的孔结构参数,并以改性氧化铝为涂层基体材料制备Pd基催化剂。结果表明,改性Al2O3-02具有比表面积:134.691m2·g-1,孔容:0.5851cm3·g-1,孔径:8.6877nm,且用其制备的Pd基催化剂TWC-02的性能较优越;该催化剂经950℃煅烧后,Pd均匀分散于改性Al2O3-02表面,甚至温度≥1050℃高温条件下煅烧后Pd的分散性仍较好。氧化铝对Pd基催化剂起到结构助催化作用,起燃活性评价试验也证实改性Al2O3-02的这一优越性能。Pore structural parameters of 2 kinds of alumina before and after modification were reported, and with the modified alumina as coating Pd-based catalysts were prepared. The results show that the modified Al2O3-02 has specific area of 134.691 m^2·g^-1 and pore structure of 0.5851 cm3·g-1 and 8.6877 nm. The obtained Pd-based catalyst TWC-02 has superior properties. After calcining the catalyst at 950 oC, Pd grains homogeneously disperse in the surface of modified Al2O3-02; even ≥1050 oC, the dispersity of Pd is still good. Alumina has the effect of structure promoter on Pd-based catalyst. The superiority of the structure character of Al2O3-02 is also proved by a light-off active test.

关 键 词：比表面 孔结构 Pd基催化剂 老化试验 催化特性 

分 类 号：O643.36[理学—物理化学]