Availability of NH3 adsorption in vanadium-based SCR for reducing NOx emission and NH3 slip

This study was carried out to analyze the amount of NH3 adsorption by selective catalytic reduction using various methods for the development of an optimized urea injection control logic. The maximum adsorbable amount, available adsorption amount for NOx reduction, and maximum adsorption amount befo...

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Published inJournal of industrial and engineering chemistry (Seoul, Korea) Vol. 78; pp. 433 - 439
Main Authors Ko, Ahyun, Woo, Youngmin, Jang, Jinyoung, Jung, Yongjin, Pyo, Youngdug, Jo, Hyun, Lim, Ocktaeck, Lee, Young Jae
Format Journal Article
LanguageEnglish
Published Elsevier B.V 25.10.2019
한국공업화학회
Subjects
NH3adsorption
NH3slip
Nitrogen oxides (NOx)
Urea-SCR
화학공학
Nitrogen oxides (NOx)
Urea-SCR
NH3slip
NH3adsorption
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Summary:This study was carried out to analyze the amount of NH3 adsorption by selective catalytic reduction using various methods for the development of an optimized urea injection control logic. The maximum adsorbable amount, available adsorption amount for NOx reduction, and maximum adsorption amount before NH3 slip were separately measured. The results of the three types of adsorption amounts show that the optimum operating range for urea control gradually narrowed for high exhaust gas temperatures. Furthermore, it was found to be particularly challenging to completely remove NH3 slip without ammonia oxidation catalyst in the transient operation of the engine.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2019.05.024