纳米级铈锆氧化物固溶体在催化剂中的应用  

Application of nano-sized cerium-zirconium oxide solid solution in the catalysts

作　　者：郑育英[1] 黄慧民[1] 邓爱华[1] 王俏运[1] 文焱炳[2] 

机构地区：[1]广东工业大学轻工化工学院,广东广州510006 [2]华南理工大学化工与能源学院

出　　处：《无机盐工业》2008年第6期13-15,共3页Inorganic Chemicals Industry

基　　金：广东省自然科学基金团队项目(04205301);广东省重大工业攻关项目(2004A10701005)

摘　　要：对以铈锆氧化物固溶体Ce0.75Zr0.25O2为助剂的催化剂进行了活性评价。实验结果表明:固-固化学反应法制备的Ce0.75Zr0.25O2固溶体与传统的共沉淀法制备的Ce0.75Zr0.25O2固溶体在三效催化剂中作为催化助剂的作用是相当的,对模拟汽车尾气起到了很好的净化作用。还研究了Ce0.75Zr0.25O2对交联粘土(PILC)催化剂Cu/CeTi-PILC的丙烯选择性催化还原一氧化氮反应的影响。实验证明:Ce0.75Zr0.25O2固溶体能提高催化剂5%Cu/CeTi-PILC对C3H6和一氧化氮的催化活性,起燃温度明显降低,其中C3H6起燃温度降低了15℃;一氧化氮起燃温度降低了112℃。Activity of the catalysts with Ce0.75 Zr0.25 O2 as the addition agent was evaluated. The resuhs showed：there was scarcely any difference between Ce0.75Zr0.25O2 solid solution prepared by solid - solid chemical reaction and that of by traditional co - precipitation method as the catalytic addition agent in three - way catalyst. They both have good effect on purification of analogous auto-exhaust. Moreover the effect of Ce0.75Zr0.25 O2 on Cu/CeTi -PILE catalyst when propylene selectively catalyzed NO was studied. The results indicated that Ce0. 75 Zr0. 25 O2 solid solution could improve catalytic activity by 5% of Cu/CeTi - PILC to C3H6 and NO,light - off temperature of C3H6 drops 15 ℃ ,and that of NO drops 112 ℃.

关 键 词：铈锆氧化物固溶体 交联粘土 三效催化剂 

分 类 号：TQ133.3[化学工程—无机化工]