超声辅助合成铈锆铝氧化物及其负载Pd催化剂对乙醇汽油车尾气的净化性能

doi:10.1016/S1872-2067(11)60488-9

催化学报 ›› 2013, Vol. 34 ›› Issue (4): 751-757.DOI: 10.1016/S1872-2067(11)60488-9

超声辅助合成铈锆铝氧化物及其负载Pd催化剂对乙醇汽油车尾气的净化性能

刘建英^a,b, 赵明^a, 徐成华^b, 刘盛余^b, 张雪乔^b, 陈耀强^a

a 四川大学催化材料研究所, 四川成都610064;
b 成都信息工程学院资源环境学院, 四川成都610225

收稿日期:2012-10-11 修回日期:2012-11-13 出版日期:2013-04-23 发布日期:2013-04-24
通讯作者: 赵明,陈耀强
基金资助:
国家自然科学基金(21173153); “大气环境模拟与污染控制”四川省高校重点实验室(ZZKT2012005); 四川省科技厅 (2012FZ0008).

Ultrasonic-assisted fabrication and catalytic activity of CeZrAl oxide-supported Pd for the purification of gasohol exhaust

LIU Jianying^a,b, ZHAO Ming^a, XU Chenghua^b, LIU Shengyu^b, ZHANG Xueqiao^b, CHEN Yaoqiang^a

a Institute of Catalytic Material Science, Sichuan University, Chengdu 610064, Sichuan, China;
b The College of Resource and Environment, Chengdu University of Information Technology, Chengdu 610225, Sichuan, China

Received:2012-10-11 Revised:2012-11-13 Online:2013-04-23 Published:2013-04-24
Supported by:
This work was supported by the National Natural Science Foundation of China (21173153), Air Environmental Modeling and Pollution Controlling Key Laboratory of Sichuan Higher Education Institutes (ZZKT2012005), and Science and Technology Department of Sichuan Province (2012FZ0008).

摘要/Abstract

摘要：

在共沉淀法的基础上辅助以超声制备了铈锆铝复合氧化物(CZA),采用比表面分析仪、X射线衍射、程序升温还原、储氧量和X射线光电子能谱对材料进行了表征.结果表明,超声振荡有助于小而均匀的孔生成,有利于Pd物种的分散;超声振荡还能提高CZA的储氧量,使材料的表面组成与体相组成趋于一致.催化活性测试表明,材料经过超声处理的Pd-CZA净化乙醇汽油车尾气时,可以将氧气的完全利用窗口从0~0.64%拓宽至0~1.16%;并且使乙醇、C₃H₈和CO起燃温度分别下降了30,28和24℃.此外,Pd物种与CZA-U的相互作用有利于NO与C₃H₈和C₂H₅OH的反应.

关键词: 铈锆铝, 超声, 钯, 乙醇汽油, 尾气, 净化

Abstract:

CeZrAl oxides (CZA) using as the support of Pd catalyst for purification of gasohol exhausts are synthesized by co-precipitation assisted by ultrasonic vibration. CZA are characterized by surface analysis, X-ray diffraction, temperature-programmed reduction by hydrogen, oxygen storage capacity (OSC), and X-ray photoelectron spectroscopy. The results show that ultrasonic vibration promotes the formation of smaller, more uniform pores in CZA, which is beneficial to the dispersion of Pd species. Ultrasonic vibration can also improve the OSC and uniformity of the composition of CZA on its surface and in bulk. Catalytic tests demonstrate that ultrasonic treatment of CZA widens the window of the full use of oxygen from 0-0.64% to 0-1.16% of Pd-CZA catalysts in the purification of gasohol exhaust, and decreases the light-off temperature of ethanol, propane, and carbon monoxide by 30, 28, and 24℃, respectively. Moreover, the interaction between Pd species and CZA can enhance the reaction of NO with propane and ethanol.

Key words: Ceria-zirconia-alumina, Ultrasonic, Palladium, Gasohol, Exhaust, Purification

刘建英, 赵明, 徐成华, 刘盛余, 张雪乔, 陈耀强. 超声辅助合成铈锆铝氧化物及其负载Pd催化剂对乙醇汽油车尾气的净化性能[J]. 催化学报, 2013, 34(4): 751-757.

LIU Jianying, ZHAO Ming, XU Chenghua, LIU Shengyu, ZHANG Xueqiao, CHEN Yaoqiang. Ultrasonic-assisted fabrication and catalytic activity of CeZrAl oxide-supported Pd for the purification of gasohol exhaust[J]. Chinese Journal of Catalysis, 2013, 34(4): 751-757.

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超声辅助合成铈锆铝氧化物及其负载Pd催化剂对乙醇汽油车尾气的净化性能

Ultrasonic-assisted fabrication and catalytic activity of CeZrAl oxide-supported Pd for the purification of gasohol exhaust

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