Study on emission characteristics of urea-SCR aftertreatment system of diesel engine

Lei Jiang*, Yun Shan Ge, Pu Li, Zhi Hua Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The performance of urea-SCR aftertreatment system is affected by many factors, such as spray type, position of injection, air-blast system and characteristics of catalyst, etc. The study of urea-SCR system performance made on engine test bench reveals that spray type and direction of injection have a great influence on urea solution atomization and spatial distribution; distance between the spray nozzle and the catalyst the greater, the conversion efficiency the better; for the urea-SCR system used here, air-blast pressure of 0.2 MPa is suitable; NOx conversion efficiency increases with catalyst temperature rising; the catalyst temperature the lower, its storing ammonia capacity the greater; and the SCR may affect ratio of NO and NO2 and concentration of HC and CO.

Original languageEnglish
Pages (from-to)30-35
Number of pages6
JournalNeiranji Gongcheng/Chinese Internal Combustion Engine Engineering
Volume31
Issue number5
Publication statusPublished - Oct 2010

Keywords

  • Conversion efficiency
  • IC engine
  • NO
  • SCR
  • Urea

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