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题名: CeO2-ZrO2-La2O3-Al2O3 composite oxide and its supported palladium catalyst for the treatment of exhaust of natural gas engined vehicles
作者: Zhang, Xiaoyu1;  Long, Enyan1;  Li, Yile1;  Guo, Jiaxiu2;  Zhang, Lijuan3;  Gong, Maochu1;  Wang, Minghua4;  Chen, Yaoqiang1
关键词: Pd catalysts ;  natural gas vehicles exhaust ;  methane oxidation ;  NOx conversion ;  CeO2-ZrO2-Al2O3 ;  La2O3
刊名: JOURNAL OF NATURAL GAS CHEMISTRY
发表日期: 2009-06-01
DOI: 10.1016/S1003-9953(08)60092-4
卷: 18, 期:2, 页:139-144
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Energy & Fuels ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Engineering
英文摘要: Composite supports CeO2-ZrO2-Al2O3 (CZA) and CeO2-ZrO2-Al2O3-La2O3 (CZALa) were prepared by co-precipitation method. Palladium catalysts were prepared by impregnation and their purification ability for CH4, CO and NOx in the Mixture gas simulated the exhaust from natural gas vehicles (NGVs) operated under stoichiometric condition was investigated. The effect of La2O3 on the physicochemical properties of supports and catalysts was characterized by various techniques. The characterizations with X-ray diffraction (XRD) and Raman spectroscopy revealed that the doping of La2O3 restrained effectively the sintering of crystallite particles, maintained the crystallite particles in nanoscale and stabilized the crystal phase after calcination at 1000 degrees C. The results of N-2-adsorption, H-2-temperature-programmed reduction (H-2-TPR) and oxygen storage capacity (OSC) measurements indicated that La2O3 improved the textural properties, reducibility and OSC of composite supports. Activity testing results showed that the catalysts exhibit excellent activities for the simultaneous removal of methane. CO and NOx, in the simulated exhaust gas. The catalysts supported on CZALa showed remarkable thermal stability and catalytic activity for the three pollutants, especially for NOx. The prepared palladium catalysts have high ability to remove NOx, CH4 and CO, and they can be used as excellent catalysts for the purification of exhaust from NGVs operated under stoichiometric condition. The catalysts reported in this work also have significant potential in industrial application because of their high performance and low cost.
关键词[WOS]: OXYGEN STORAGE CAPACITY ;  THERMAL-STABILITY ;  STRUCTURAL CHARACTERISTICS ;  EMISSIONS ABATEMENT ;  REDUCTION CATALYST ;  3-WAY CATALYSTS ;  SOLID-SOLUTIONS ;  CERIA-ZIRCONIA ;  MIXED OXIDES ;  PD
语种: 英语
WOS记录号: WOS:000267854100004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141418
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Sichuan Univ, Coll Chem, Minist Educ, Key Lab Green Chem & Technol, Chengdu 610064, Sichuan, Peoples R China
2.Sichuan Univ, Coll Architecture & Environm, Chengdu 610064, Sichuan, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
4.Sichuan Tianyi Sci & Technol Co Ltd, Chengdu 610225, Sichuan, Peoples R China

Recommended Citation:
Zhang, Xiaoyu,Long, Enyan,Li, Yile,et al. CeO2-ZrO2-La2O3-Al2O3 composite oxide and its supported palladium catalyst for the treatment of exhaust of natural gas engined vehicles[J]. JOURNAL OF NATURAL GAS CHEMISTRY,2009,18(2):139-144.
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