一个新的满足未来排放标准的摩托车尾气净化催化剂

采用共沉淀法制备CeO2-ZrO2-La2O3-PrO2-Al2O3复合氧化物载体材料,以浸渍法制备了Pd-Rh, Pt-Rh和Pt-Pd-Rh型整体式催化剂.用N2吸附-脱附、程序升温还原、储氧量和X射线衍射对其进行了表征,并考察了老化前后催化剂的空燃比特性、空速特性和温度特性.结果表明,在三种催化剂中, Pt-Pd-Rh型催化剂表现出更优异的性能.在40000 h-1空速下,新鲜Pt-Pd-Rh型催化剂对C3H8, CO和NO的起燃温度T50分别为239,187和191oC,ΔT （T90-T50）分别为21,3和3oC.老化后, C3H8, CO和NO的T50分别为298,203和223...

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Bibliographic Details
Published in催化学报 Vol. 35; no. 9; pp. 1482 - 1491
Main Author 王苏宁 崔亚娟 兰丽 史忠华 赵明 龚茂初 方瑞梅 陈思洁 陈耀强
Format Journal Article
LanguageChinese
Published 四川大学化学工程学院,四川成都,610064%四川大学化学学院，教育部绿色化学与技术重点实验室，四川成都610064%四川大学化学工程学院，四川成都610064 2014
四川大学化学学院，教育部绿色化学与技术重点实验室，四川成都610064
Subjects
摩托车尾气净化
整体式催化剂
温度特性
空燃比特性
空速特性
铂-钯-铑
整体式催化剂
Motorcycle exhaust purification
Space velocity characteristic
摩托车尾气净化
空速特性
Monolithic catalyst
Pt-Pd-Rh
Temperature characteristic
空燃比特性
铂-钯-铑
温度特性
Air-to-fuel ratio characteristic
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ISSN0253-9837
1872-2067
DOI10.1016/S1872-2067(14)60092-9

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Summary:采用共沉淀法制备CeO2-ZrO2-La2O3-PrO2-Al2O3复合氧化物载体材料,以浸渍法制备了Pd-Rh, Pt-Rh和Pt-Pd-Rh型整体式催化剂.用N2吸附-脱附、程序升温还原、储氧量和X射线衍射对其进行了表征,并考察了老化前后催化剂的空燃比特性、空速特性和温度特性.结果表明,在三种催化剂中, Pt-Pd-Rh型催化剂表现出更优异的性能.在40000 h-1空速下,新鲜Pt-Pd-Rh型催化剂对C3H8, CO和NO的起燃温度T50分别为239,187和191oC,ΔT （T90-T50）分别为21,3和3oC.老化后, C3H8, CO和NO的T50分别为298,203和223oC,ΔT分别为22,5和13oC,且老化前后空燃比窗口较宽,适合于未来排放标准的摩托车尾气净化.
Bibliography:Suning Wang, Yajuan Cui, Li Lan, Zhonghua Shi, Ming Zhao, Maochu Gong, Ruimei Fang, Sijie Chen, Yaoqiang Chen （College of Chemical Engineering, Siehuan University, Chengdu 610064, Sichuan, China b Key Laboratory of Green Chemistry ＆ Technology of Ministry of EducaOon, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China）
A new composite oxide material as support, CeO2-ZrO2-La2O3-PrO2-Al2O3, was synthesized by a co-precipitation method. Pd-Rh, Pt-Rh, and Pt-Pd-Rh supported on monolithic carrier catalysts were obtained by an impregnation route. The textural, structural, and reductive properties of the cata-lysts were characterized by N2 adsorption-desorption, temperature-programmed reduction, oxygen storage capacity measurements, and X-ray diffraction. The air-fuel-ratio （A/F）, space velocity （SV）, and temperature characteristics of the fresh and aged catalysts were investigated on a systematic basis. The results showed that among the three catalysts, Pt-Pd-Rh displayed the best performance.
ISSN:0253-9837
1872-2067
DOI:10.1016/S1872-2067(14)60092-9