| Pd基催化剂的性能对比 |
| |
| 引用本文： | 赵青,赵云昆.Pd基催化剂的性能对比[J].贵金属,2009,30(1). |
| |
| 作者姓名： | 赵青 赵云昆 |
| |
| 作者单位： | 昆明贵研催化剂有限责任公司,云南昆明650106 |
| |
| 摘 要： | 在催化剂中添加镧可抑制活性位的长大和PdO颗粒的分解，增强催化剂的催化活性和热稳定性。研究了老化前和老化后的Pd／CZ／La—Al2O3系列、Pd／La—Al2O3、Pd／CZ催化剂，Pd／CZ／La—Al2O3系列中Pd、CZ（Ce1-xZrxO2）、La—Al2O3材料添加顺序不同对催化剂涂层性能的影响。对于老化前和老化后的催化剂，Pd、CZ、La—Al2O3材料添加顺序对催化活性影响较小，Pd／W有利于CO转化，Pd／CZ有利于HC、NOx转化。通过XRD、XPS、化学吸附仪、BET表征证明了老化过程中发生了催化失活。
|
| 关 键 词： | 物理化学 Al2O3 氧化镧 CZ 钯 XRD |
Comparative Research of Catalytic Activity of Pd-based Catalysts |
| |
| ZHAO Qing,ZHAO Yunkun.Comparative Research of Catalytic Activity of Pd-based Catalysts[J].Precious Metals,2009,30(1). |
| |
| Authors: | ZHAO Qing ZHAO Yunkun |
| |
| Affiliation: | Kunming Sino-Platinum Metals Catalyst Co.Ltd.;Kunming;Yunnan 650106;China |
| |
| Abstract: | The addition of La to catalysts inhibits the site growth and decomposition of PdO particles,which increases the catalytic activity and thermal stability of catalysts.In this study,the fresh and aged series of Pd/CZ/La-Al2O3,Pd/La-Al2O3 and Pd/CZ catalysts were investigated.The influence of the addition order of Pd,CZ,La-Al2O3 material in catalyst washcoat of Pd/CZ/La-Al2O3 was also examined.For fresh and aged catalysts,it was found that the addition order of Pd,CZ and La-Al2O3 has little effect on the catal... |
| |
| Keywords: | physical chemistry Al2O3 lanthanum oxide CZ palladium X-ray diffraction |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
