摘要
用共沉淀技术在室温、pH =10 0的条件下制备出了CexZr1-xO2 固溶体 ,将其用于Pd基三效催化剂的制备 ,对催化剂的性能进行了评价 ,结果表明 :和纯的CeO2 相比 ,含CexZr1-xO2 固溶体的催化剂具有较高的催化性能 ,其中Pd/Ce0 6Zr0 .4 O2 催化剂性能最佳 ,HC、CO、NO的转化率在A/F =14 6时分别为 97 33%、89 5 2 %、10 0 %;新鲜催化剂的起燃温度分别为 186、180、185℃ ,高温处理后起燃温度分别为 2 49、2 41、2 46℃。
Ce xZr 1-xO 2 solid solutions were prepared by coprecipitation technique and used to prepare Pd-based three-way catalysts as key materials.Performance of the catalysts was evaluated.The results showed that the catalysts containing Ce xZr 1-xO 2 solid solutions have higher conversion as well as lower light-off temperature compared with that containing pure CeO 2.Pd/Ce 0.6Zr 0.4O 2 catalyst has the best performance with conversions of 97.33%,89.52% and 100% for HC,CO and NO respectively.After treatment at the high temperature of 1050 ℃,the light-off temperatures for HC,CO and NO change into 249,241 and 246 ℃ from 186,180 and 185 ℃ respectively.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2003年第2期72-73,104,共3页
Fine Chemicals
