欢迎访问《汽车安全与节能学报》，
汽车安全与节能学报

汽车安全与节能学报 ›› 2016, Vol. 07 ›› Issue (02): 236-240.DOI: 10.3969/j.issn.1674-8484.2016.02.015

• • 上一篇    

Si-Al 催化剂对碳烟氧化特性影响的XPS 分析

胡静1，胡准2，张俊3, 帅石金3*   

  1. 1. 上海理工大学 机械工程学院，上海，200093 ；
    2. 清华大学 苏州汽车研究院，苏州，215200 ；
    3. 清华大学 汽车安全与节能国家重点实验室， 北京 100084
  • 收稿日期:2015-11-08 出版日期:2016-06-25 发布日期:2016-07-06
  • 作者简介:胡静(1976—)，女( 汉)，安徽，讲师。E-mail: irishj@126.com
  • 基金资助:

    汽车安全与节能国家重点实验室开放基金(KF14072)

XPS analysis of soot oxidation characteristics with Si-Al catalyst effects

HU Jing1, HU Zhun2, ZHANG Jun3, SHUAI Shijin3*   

  1. 1. Mechanical Engineering College, University of Shanghai for Science and Technology, Shanghai, 230039 ；
    2. Suzhou Automotive Research Institute, Tsinghua University, Suzhou, 215200 ；
    3. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 10084, China
  • Received:2015-11-08 Online:2016-06-25 Published:2016-07-06

PDF

897

摘要：

为揭示Si-Al 催化剂对碳烟氧化特性的影响作用，对碳烟及其部分被氧化碳烟的表面结构特征进行X 射线光电子能谱(XPS) 分析，了解碳、氧元素的表面结构中的存在形态及其差异。以商业碳黑(PU) 代替实际的柴油机碳烟，碳烟中不加入催化剂，随着氧化温度的上升，碳烟微观结构的晶格化程度越来越深。加入催化剂后，650 ℃下碳烟的氧化特性与不加催化剂的相似，微观结构呈现较多的晶格结构。1 000 ℃下碳烟的微观结构中呈现出较多的无序的无定型结构。可知：Si-Al 催化剂改变了碳烟在氧气气氛下的氧化机理；1 000 ℃下催化剂的加入，会促进难以氧化的晶格结构的氧化。

关键词: 柴油机, 颗粒物的排放, 碳烟氧化, X射线光电子能谱分析(XPS) , 微观结构, 催化剂

Abstract:

X-ray photoelectron spectroscopy (XPS) analysis was used to investigate effects of catalyst on soot oxidation characteristics, existing form and differences of soot and partially oxidized soot were examined. Printex-U (PU) was used to surrogate engine soot, soot became more and more ordered crystalline structure with the temperature increasing with no catalyst added. Soot added catalyst appeared similar oxidation mechanism as well as the microstructure with finish oxidation at 650 ℃ . However, soot appeared lesser ordered crystalline structure under high oxidation temperature of 1000 ℃ . The results show that Si-Al catalyst changes the soot oxidation mechanism under oxygen atmosphere, catalyst with finish oxidation at 1 000 ℃ promotes oxidation of ordered crystalline structure which was difficult to be oxidized.

Key words: diesel engine, particulate matter (PM) emission, soot oxidation, X-ray photoelectron spectroscopy (XPS), microstructure, catalyst