A Study on the Improvement of NOx Reduction Efficiency for a Urea SCR System

Hirotaka Nishiyama, Yo Tanaka, Taiki Adachi, Syunsuke Kawamura, Yasuhiro Daisho, Hisakazu Suzuki, Hajime Ishii, Kyohei Yamaguchi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Urea SCR (Selective Catalytic Reduction) exhaust after-treatment systems are one of the most promising measures to reduce NOx emissions from diesel engines. Both Cu-zeolite (Cu-SCR) and Fe-zeolite (Fe-SCR) urea SCR systems have been studied extensively but not many detailed studies have been conducted on the combination of both systems. Thus, we carried out studies on such Combined-SCR systems and their capability to reduce NOx under various engine operating conditions. We also conducted transient engine tests using different catalyst systems to compare their performance. The results show that combined-SCR systems can reduce NOx more effectively than Fe-SCR or Cu-SCR alone. The best NOx reduction performance was achieved at a Cu ratio of 0.667 (i.e. Fe: Cu =1: 2). Combined-SCR thus apparently benefits from the characteristics of both Cu-SCR and Fe-SCR, allowing it to reduce NOx over a wide range of operating conditions.

Original languageEnglish
JournalSAE Technical Papers
Volume2015-September
Issue numberSeptember
DOIs
Publication statusPublished - 2015 Sep 1

Fingerprint

Selective catalytic reduction
Urea
Engines
Diesel engines

ASJC Scopus subject areas

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

Cite this

Nishiyama, H., Tanaka, Y., Adachi, T., Kawamura, S., Daisho, Y., Suzuki, H., ... Yamaguchi, K. (2015). A Study on the Improvement of NOx Reduction Efficiency for a Urea SCR System. SAE Technical Papers, 2015-September(September). https://doi.org/10.4271/2015-01-2014

A Study on the Improvement of NOx Reduction Efficiency for a Urea SCR System. / Nishiyama, Hirotaka; Tanaka, Yo; Adachi, Taiki; Kawamura, Syunsuke; Daisho, Yasuhiro; Suzuki, Hisakazu; Ishii, Hajime; Yamaguchi, Kyohei.

In: SAE Technical Papers, Vol. 2015-September, No. September, 01.09.2015.

Research output: Contribution to journalArticle

Nishiyama, H, Tanaka, Y, Adachi, T, Kawamura, S, Daisho, Y, Suzuki, H, Ishii, H & Yamaguchi, K 2015, 'A Study on the Improvement of NOx Reduction Efficiency for a Urea SCR System', SAE Technical Papers, vol. 2015-September, no. September. https://doi.org/10.4271/2015-01-2014
Nishiyama H, Tanaka Y, Adachi T, Kawamura S, Daisho Y, Suzuki H et al. A Study on the Improvement of NOx Reduction Efficiency for a Urea SCR System. SAE Technical Papers. 2015 Sep 1;2015-September(September). https://doi.org/10.4271/2015-01-2014
Nishiyama, Hirotaka ; Tanaka, Yo ; Adachi, Taiki ; Kawamura, Syunsuke ; Daisho, Yasuhiro ; Suzuki, Hisakazu ; Ishii, Hajime ; Yamaguchi, Kyohei. / A Study on the Improvement of NOx Reduction Efficiency for a Urea SCR System. In: SAE Technical Papers. 2015 ; Vol. 2015-September, No. September.
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