Effect of ethene (C2H4) on the plasma DeNO x process from diesel engine exhaust

Kwang Seo Park, Dong Inn Kim, Hyeong Sang Lee, Bae Hyeock Chun, Woong Sup Yoon, Kwang Min Chun

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Effect of ethene on the DeNOx conversion process in a simulated diesel engine operating conditions was investigated experimentally and theoretically. With the addition of even a small amount of ethene the NO to NO2 conversion enhances greatly. The energy required to convert one NO molecule is 27 eV with 250 ppm ethene added, while 137 eV without ethene at 473 K. The effect of energy density, temperature, and the initial concentrations of ethene and oxygen are also discussed and the results show that the increase of the mentioned parameters lead to the promotion of NO oxidation. A kinetic model used in this study shows good agreement with the experimental result. Byproducts like formaldehyde (CH2O) and methyl nitrite (CH 3ONO) predicted by model calculation are broken up into CO and H 2O eventually when high energy is delivered to the gas mixture. Sensitivity analysis shows that the main reactions of NO oxidation when ethene is added are: HO2+NO→NO2+OH, RO2+NO→ NO2+RO, where R is a hydrocarbon radical. Also the direct oxidizing reaction of NO with O cannot be neglected.

Original languageEnglish
Pages (from-to)77-83
Number of pages7
JournalInternational Journal of Automotive Technology
Issue number2
Publication statusPublished - 2001 Jun

All Science Journal Classification (ASJC) codes

  • Automotive Engineering


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