催化学报

催化学报 ›› 2013, Vol. 34 ›› Issue (4): 667-673.DOI: 10.1016/S1872-2067(12)60545-2

• 研究快讯 • 上一篇    下一篇

一种具有低SO2氧化活性并满足欧V排放标准的柴油车氧化型催化剂

陈永东a, 王磊b, 关小旭a, 唐水花a, 龚茂初c, 陈耀强c   

  1. a 西南石油大学油气藏地质及开发工程国家重点实验室, 四川成都610500;
    b 四川中自尾气净化有限公司, 四川成都610225;
    c 四川大学绿色化学与技术教育部重点实验室, 四川成都610064
  • 收稿日期:2012-12-18 修回日期:2013-01-30 出版日期:2013-04-23 发布日期:2013-04-24
  • 通讯作者: 陈永东,陈耀强
  • 基金资助:

    国家自然科学基金(21173153); 绿色催化四川省高校重点实验室开放课题基金(LYY1101); 四川省教育厅一般项目(12ZB163); 西南石油大学校级科技基金(2012XJZ037); 四川省科技创新苗子工程项目(2012ZZ072).

A novel diesel oxidation catalyst with low SO2 oxidation activity and capable of meeting Euro V emission standards

CHEN Yongdonga, WANG Leib, GUAN Xiaoxua, TANG Shuihuaa, GONG Maochuc, CHEN Yaoqiangc   

  1. a State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan, China;
    b Sichuan Zhongzi Exhaust Purge Co., Ltd., Chengdu 610225, Sichuan, China;
    c Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
  • Received:2012-12-18 Revised:2013-01-30 Online:2013-04-23 Published:2013-04-24
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21173153), Opening Project of Key Laboratory of Green Catalysis of Sichuan Institutes of High Education (LYY1101), the Scientific Research Fund of Sichuan Provincial Education Department (12ZB163), the Science and Technology Foundation of Southwest Petroleum University (2012XJZ037), and the Runner Technology Innovation Project of Sichuan Province (2012ZZ072).

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摘要：

制备了具有高性能的稀土储氧材料Ce0.75Zr0.25O2-Al2O3,Ti0.9Zr0.1O2复合材料和Cr改性的β分子筛(Cr-β分子筛),并以此制备了单Pt型柴油车尾气净化氧化型催化剂.低温N2吸附-脱附、储氧量测试结果表明,Ce0.75Zr0.25O2-Al2O3样品具有较大的比表面积和优异的储氧性能,Ti0.9Zr0.1O2复合材料也具有优越的织构性能.催化剂对HC和CO具有较高的催化活性,可使SOF在140℃开始转化,且具有较低的SO2氧化活性.在YC4F国Ⅳ柴油机的测试结果表明,经该催化剂处理后的尾气排放能够满足欧Ⅴ排放标准对HC和CO排放要求.

关键词: 储氧材料, 钛, 锆, 复合氧化物, 铬改性分子筛, 氧化型催化剂

Abstract:

A diesel oxidation catalyst was prepared from several high performance materials: the new rare earth oxygen storage compound Ce0.75Zr0.25O2-Al2O3, the composite oxide Ti0.9Zr0.1O2 and chromium-modified β molecular sieve. These component materials were characterized and used to prepare a Pt-based catalyst designed to reduce diesel engine exhaust emissions. The results of low temperature N2 adsorption-desorption and oxygen storage capacity tests demonstrated that Ce0.75Zr0.25O2-Al2O3 exhibits a large specific surface area and excellent oxygen storage capacity, and that Ti0.9Zr0.1O2 exhibits superior textural properties. Evaluations of catalytic activity showed that the catalyst prepared from these materials has reduced capacity for the oxidation of SO2 but high catalytic activity towards the oxidation of hydrocarbons (HC) and CO, and is also able to convert the exhaust soluble organic fraction at temperatures as low as 140℃. Tests using a domestic YC4F-type diesel engine found that exhaust treated by the catalyst prepared in this research is capable of meeting the HC and CO emission requirements of the Euro V standard.

Key words: Oxygen storage material, Titanium, Zirconium, Composite material, Chromium-modified molecular sieve, Oxidation catalyst