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  The oxidation of soot particulate in the presence of NO2

Müller, J.-O., Frank, B., Jentoft, R. E., Schlögl, R., & Su, D. S. (2012). The oxidation of soot particulate in the presence of NO2. Catalysis today, 191(1), 106-111. doi:10.1016/j.cattod.2012.03.010.

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 Creators:
Müller, Jens-Oliver1, Author
Frank, Benjamin2, Author           
Jentoft, Rolf E.3, Author
Schlögl, Robert2, Author           
Su, Dang Sheng2, 4, Author           
Affiliations:
1Siemens AG, 80333 Munich, Germany, ou_persistent22              
2Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
3Chemical, Biological, and Materials Engineering, University of Oklahoma School, ou_persistent22              
4Shenyang National Laboratory for Materials Science Institute of Metal Research, Chinese Academy of Science, ou_persistent22              

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Free keywords: Carbon; Microstructure; Surface functionalization; Thermogravimetry; Kinetics; Combustion
 Abstract: The microstructure of soot-like carbons is correlated with their reactivity toward combustion. The focus of this study is on Euro IV heavy duty diesel engine soot. Additionally, two soot samples providing lower and larger particle sizes as their most striking property are taken as references. The effect of NO2 addition to the O2-containing gas feed is investigated. It is found that NO2 accelerates the oxidation of soot in the low-temperature region (250–400 °C) due to an increased surface functionalization with oxygen groups and a subsequent decomposition thereof. Accordingly, initially highly functionalized soot is less susceptible to this effect. The apparent activation energy of combustion is remarkably lowered in the presence of NO2. It is found that the total reactivity correlates with microstructural features such as surface functionalization, size and curvature of basic structural units, stack height, and particle diameter.

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Language(s): eng - English
 Dates: 2012-04-062012-09-30
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.cattod.2012.03.010
 Degree: -

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Title: Catalysis today
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 191 (1) Sequence Number: - Start / End Page: 106 - 111 Identifier: ISSN: 0920-5861
CoNE: https://pure.mpg.de/cone/journals/resource/954925564669