Measurement of soot oxidation with No2-O2-H 2O in a flow reactor simulating diesel engine DPF

J. Jung; J. H. Lee; S. Song; K. M. Chun

doi:10.1007/s12239-008-0051-4

Measurement of soot oxidation with No₂-O₂-H ₂O in a flow reactor simulating diesel engine DPF

J. Jung, J. H. Lee, S. Song, K. M. Chun

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

Understanding the mechanism of carbon oxidation is important for the successful modeling of diesel particulate filter regeneration. Characteristics of soot oxidation were investigated with carbon black (Printex-U). A flow reactor system that could simulate the condition of a diesel particulate filter and diesel exhaust gas was designed. Kinetic constants were derived and the reaction mechanisms were proposed using the experimental results and a simple reaction scheme, which approximated the overall oxidation process in TPO as well as CTO. From the experiments, the apparent activation energy for carbon oxidation with NO₂-O₂-H₂O was determined to be 40±2 kJ/mol, with the first order of carbon in the range of 10-90% oxidation and a temperature range of 250-500°C. This value was exceedingly lower than the activation energy of NO₂-O₂ oxidation, which was 60±3 kJ/mol. When NO₂ exists with O₂ and H₂O, the reaction rate increases in proportion to NO₂. It increases nonlinearly with O₂ or H₂O concentration when the other two oxidants are fixed.

Original language	English
Pages (from-to)	423-428
Number of pages	6
Journal	International Journal of Automotive Technology
Volume	9
Issue number	4
DOIs	https://doi.org/10.1007/s12239-008-0051-4
Publication status	Published - 2008 Aug

Bibliographical note

Funding Information:
ACKNOWLEDGEMENT−This work is a part of the project “Development of Partial Zero Emission Technology for Future Vehicle” funded by Ministry of Commerce, Industry and Energy and we are appreciated its financial support.

All Science Journal Classification (ASJC) codes

Automotive Engineering

Access to Document

10.1007/s12239-008-0051-4

Cite this

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title = "Measurement of soot oxidation with No2-O2-H 2O in a flow reactor simulating diesel engine DPF",

abstract = "Understanding the mechanism of carbon oxidation is important for the successful modeling of diesel particulate filter regeneration. Characteristics of soot oxidation were investigated with carbon black (Printex-U). A flow reactor system that could simulate the condition of a diesel particulate filter and diesel exhaust gas was designed. Kinetic constants were derived and the reaction mechanisms were proposed using the experimental results and a simple reaction scheme, which approximated the overall oxidation process in TPO as well as CTO. From the experiments, the apparent activation energy for carbon oxidation with NO2-O2-H2O was determined to be 40±2 kJ/mol, with the first order of carbon in the range of 10-90% oxidation and a temperature range of 250-500°C. This value was exceedingly lower than the activation energy of NO2-O2 oxidation, which was 60±3 kJ/mol. When NO2 exists with O2 and H2O, the reaction rate increases in proportion to NO2. It increases nonlinearly with O2 or H2O concentration when the other two oxidants are fixed.",

author = "J. Jung and Lee, {J. H.} and S. Song and Chun, {K. M.}",

note = "Funding Information: ACKNOWLEDGEMENT−This work is a part of the project “Development of Partial Zero Emission Technology for Future Vehicle” funded by Ministry of Commerce, Industry and Energy and we are appreciated its financial support.",

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AU - Song, S.

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N2 - Understanding the mechanism of carbon oxidation is important for the successful modeling of diesel particulate filter regeneration. Characteristics of soot oxidation were investigated with carbon black (Printex-U). A flow reactor system that could simulate the condition of a diesel particulate filter and diesel exhaust gas was designed. Kinetic constants were derived and the reaction mechanisms were proposed using the experimental results and a simple reaction scheme, which approximated the overall oxidation process in TPO as well as CTO. From the experiments, the apparent activation energy for carbon oxidation with NO2-O2-H2O was determined to be 40±2 kJ/mol, with the first order of carbon in the range of 10-90% oxidation and a temperature range of 250-500°C. This value was exceedingly lower than the activation energy of NO2-O2 oxidation, which was 60±3 kJ/mol. When NO2 exists with O2 and H2O, the reaction rate increases in proportion to NO2. It increases nonlinearly with O2 or H2O concentration when the other two oxidants are fixed.

AB - Understanding the mechanism of carbon oxidation is important for the successful modeling of diesel particulate filter regeneration. Characteristics of soot oxidation were investigated with carbon black (Printex-U). A flow reactor system that could simulate the condition of a diesel particulate filter and diesel exhaust gas was designed. Kinetic constants were derived and the reaction mechanisms were proposed using the experimental results and a simple reaction scheme, which approximated the overall oxidation process in TPO as well as CTO. From the experiments, the apparent activation energy for carbon oxidation with NO2-O2-H2O was determined to be 40±2 kJ/mol, with the first order of carbon in the range of 10-90% oxidation and a temperature range of 250-500°C. This value was exceedingly lower than the activation energy of NO2-O2 oxidation, which was 60±3 kJ/mol. When NO2 exists with O2 and H2O, the reaction rate increases in proportion to NO2. It increases nonlinearly with O2 or H2O concentration when the other two oxidants are fixed.

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