Experimental investigation of soot oxidation characteristic with NO 2 and O2 using a flow reactor simulating DPF

Jay H. Lee, Heong Sang Lee, Soonho Song, Kwang Min Chun

Research output: Contribution to conferencePaperpeer-review

14 Citations (Scopus)

Abstract

Characteristics of soot oxidation were investigated with a carbon black (Printex-U). A flow reactor system which can simulate the condition of diesel particulate filter and diesel exhaust gas (1 bar, O2 0 ∼ 10%, NO2 200 ∼ 900ppm) was designed and used with the temperature programmed oxidation (TPO) and constant temperature oxidation (CTO) techniques. The temperature increase rate was 5°C/min for TPO experiments. From the experiments, the apparent activation energy for carbon oxidation with nitrogen dioxide was determined as 60 ± 3 kJ/mol with the first order of carbon in the range of 10∼90% oxidation and the temperature range of 250∼500°C. This value was exceedingly lower than the activation energy of oxygen oxidation which was 177 ± 1 kJ/mol. When oxygen exists with nitrogen dioxide, the reaction rate increased with the concentration of oxygen. Its rate of increase was faster for low oxygen concentration and slower for high concentration.

Original languageEnglish
DOIs
Publication statusPublished - 2007 Dec 1
Event2007 World Congress - Detroit, MI, United States
Duration: 2007 Apr 162007 Apr 19

Other

Other2007 World Congress
Country/TerritoryUnited States
CityDetroit, MI
Period07/4/1607/4/19

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

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