A basic study on a urea-selective catalytic reduction system for a medium-duty diesel engine

J. Kusaka*, M. Sueoka, K. Takada, Y. Ohga, T. Nagasaki, Y. Daisho

*この研究の対応する著者

研究成果: Article査読

12 被引用数 (Scopus)

抄録

NOx conversion performance of a urea-selective catalytic reduction (SCR) system comprising V2O5/TiO2 catalyst under steady state operating conditions of an 8-litre, common-rail turbo direct injection (TDI) diesel engine was investigated. It was shown that the urea-SCR system achieves 70-90 per cent NOx conversion under medium and high load conditions at 1440 r/min and that NOx conversion is low under low load conditions because of the low catalyst temperatures and the NO/NO2 ratio being higher than unity. It was also shown that NOx conversion exceeds 90 per cent when the catalyst temperature is higher than 530 K. To investigate the details of the chemistry and thermofluid dynamics within the urea-SCR system, a computational fluid dynamics (CFD) code that incorporates detailed surface chemistry was developed based on the modified subroutines of CHEMKIN-II. The spatial variations of chemical species including NO and NH3 in a thin catalyst channel was calculated using the model. The calculated result of NO conversion showed relatively good agreement with experimental results.

本文言語English
ページ(範囲)11-19
ページ数9
ジャーナルInternational Journal of Engine Research
6
1
DOI
出版ステータスPublished - 2005

ASJC Scopus subject areas

  • 自動車工学
  • 航空宇宙工学
  • 海洋工学
  • 機械工学

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