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

doi:10.3969/j.issn.1674-8484.2016.02.015

Journal of Automotive Safety and Energy ›› 2016, Vol. 07 ›› Issue (02): 236-240.DOI: 10.3969/j.issn.1674-8484.2016.02.015

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

HU Jing¹, HU Zhun², ZHANG Jun³, SHUAI Shijin^3*

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

Abstract

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

HU Jing, HU Zhun, ZHANG Jun, SHUAI Shijin. XPS analysis of soot oxidation characteristics with Si-Al catalyst effects[J]. Journal of Automotive Safety and Energy, 2016, 07(02): 236-240.

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

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