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Open AccessArticle

Investigation of Urea Uniformity with Different Types of Urea Injectors in an SCR System

1
Graduate School of Mechanical Engineering, University of Ulsan, Ulsan 680-749, Korea
2
Research Centre of Mechatronic and Electrical Power, Indonesian Institute of Sciences, Jl Sangkuriang Komplek LIPI Gd 20 Cisitu, Bandung, Jawa Barat 40135, Indonesia
3
Korea Automotive Technology Institute, 303 Poongse-ro, Poongse-myun, Dongnam-gu, Chenahn 31214, Korea
4
School of Mechanical Engineering, University of Ulsan, Ulsan 44610, Korea
*
Author to whom correspondence should be addressed.
Catalysts 2020, 10(11), 1269; https://doi.org/10.3390/catal10111269
Received: 20 October 2020 / Revised: 28 October 2020 / Accepted: 30 October 2020 / Published: 2 November 2020
Heavy-duty diesel engines in highway use account for more than 40% of total particulate and nitrogen oxide (NOx) emissions around the world. Selective catalytic reduction (SCR) is a method with effective results to reduce this problem. This research deals with problems in the urea evaporation process and ammonia gas distribution in an SCR system. The studied system used two types of urea injectors to elucidate the quality of ammonia uniformity in the SCR system, and a 12,000-cc heavy-duty diesel engine was used for experimentation to reduce NOx in the system. The uniformity of the generated quantities of ammonia was sampled at the catalyst inlet using a gas sensor. The ammonia samples from the two types of urea injectors were compared in experimental and simulation results, where the simulation conditions were based on experimental parameters and were performed using the commercial CFD (computational fluid dynamics) code of STAR-CCM+. This study produces temperatures of 371 to 374 °C to assist the vaporization phenomena of two injectors, the gas pattern informs the distributions of ammonia in the system, and the high ammonia quantity from the I-type urea injector and high quality of ammonia uniformity from the L-type urea injector can produce different results for NOx reduction efficiency quality after the catalyst process. The investigations showed the performance of two types of injectors and catalysts in the SCR system in a heavy-duty diesel engine. View Full-Text
Keywords: emissions; ammonia; selective catalytic reduction (SCR); urea injector; heavy-duty diesel engine; urea water solution (UWS) emissions; ammonia; selective catalytic reduction (SCR); urea injector; heavy-duty diesel engine; urea water solution (UWS)
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MDPI and ACS Style

Wardana, M.K.A.; Oh, K.; Lim, O. Investigation of Urea Uniformity with Different Types of Urea Injectors in an SCR System. Catalysts 2020, 10, 1269. https://doi.org/10.3390/catal10111269

AMA Style

Wardana MKA, Oh K, Lim O. Investigation of Urea Uniformity with Different Types of Urea Injectors in an SCR System. Catalysts. 2020; 10(11):1269. https://doi.org/10.3390/catal10111269

Chicago/Turabian Style

Wardana, Muhammad K.A.; Oh, Kwangchul; Lim, Ocktaeck. 2020. "Investigation of Urea Uniformity with Different Types of Urea Injectors in an SCR System" Catalysts 10, no. 11: 1269. https://doi.org/10.3390/catal10111269

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