尿素SCRシステムのNOx浄化率向上に関する研究（第3報） -低温過渡時における高効率NOx浄化メカニズム-

村田 豊; 小宮 怜; 金子 淳司; 大聖 泰弘; 鈴木 央一; 石井 素

doi:10.11351/jsaeronbun.40.1509

Research Paper

A Study on the Improvement of NOx Reduction Efficiency for a Urea SCR System (Third Report)

-High NOx Reduction Efficiency Mechanism at Transient Operation with Low Exhaust Gas Temperatures-

Yutaka Murata, Ryo Komiya, Atsushi Kaneko, Yasuhiro Daisho, Hisakazu Suzuki, Hajime Ishii

Author information

Keywords: Diesel Engine, Emission, Catalyst, Urea SCR, NO, NO₂, Fast SCR, NH₄NO₃

JOURNAL FREE ACCESS

2009 Volume 40 Issue 6 Pages 1509-1514

DOI https://doi.org/10.11351/jsaeronbun.40.1509

Details

Abstract

NOx reduction mechanism and a requirement for high NOx reduction efficiency in a urea SCR system at transient conditions with low exhaust gas temperature were investigated by using a four liters multi-cylinder diesel engine. NOx can be significantly reduced by adjusting mode-overall SCR inlet NO₂/NOx ratio at 0.5±0.1 with adopting NH₃ adsorption quantity control. It has been shown that ammonium nitrate (NH₄NO₃) plays an important role to proceeding Fast SCR reaction at transient low exhaust gas temperature conditions.

Corresponding author

Register with J-STAGE for free!