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Characterization of the urea-water spray impingement in diesel selective catalytic reduction systems

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  • Liao, Yujun
  • Dimopoulos Eggenschwiler, Panayotis
  • Rentsch, Daniel
  • Curto, Francesco
  • Boulouchos, Konstantinos

Abstract

Exhaust after-treatment selective catalytic reduction (SCR) systems based on urea-water solution are state-of-the-art technologies mitigating NOx emissions for diesel and lean combustion systems. Major challenges for implementing the systems are high NOx reduction performance, uniform mixture formation and solid deposits formation. This study presents a detailed analysis of the urea-water spray wall impingement and influences on reducing agent distribution and deposit formation, thus system performance. High speed images provide detailed information of the impingement process. Moreover, impinging spray mass flux distribution and droplet size distribution have been quantified under typical diesel exhaust flow conditions. The work has been performed with a commercial 3-Hole pressure-driven injector dosing into a flow channel.

Suggested Citation

  • Liao, Yujun & Dimopoulos Eggenschwiler, Panayotis & Rentsch, Daniel & Curto, Francesco & Boulouchos, Konstantinos, 2017. "Characterization of the urea-water spray impingement in diesel selective catalytic reduction systems," Applied Energy, Elsevier, vol. 205(C), pages 964-975.
    • Handle: RePEc:eee:appene:v:205:y:2017:i:c:p:964-975
    DOI: 10.1016/j.apenergy.2017.08.088
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    References listed on IDEAS

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    1. Varna, Achinta & Spiteri, Alexander C. & Wright, Yuri M. & Dimopoulos Eggenschwiler, Panayotis & Boulouchos, Konstantinos, 2015. "Experimental and numerical assessment of impingement and mixing of urea–water sprays for nitric oxide reduction in diesel exhaust," Applied Energy, Elsevier, vol. 157(C), pages 824-837.
    2. Wang, Ziman & Ding, Haichun & Ma, Xiao & Xu, Hongming & Wyszynski, Miroslaw L., 2016. "Ultra-high speed imaging study of the diesel spray close to the injector tip at the initial opening stage with split injection," Applied Energy, Elsevier, vol. 163(C), pages 105-117.
    3. Wang, Ziman & Ding, Haichun & Ma, Xiao & Xu, Hongming & Wyszynski, Miroslaw L., 2016. "Ultra-high speed imaging study of the diesel spray close to the injector tip at the initial opening stage with single injection," Applied Energy, Elsevier, vol. 165(C), pages 335-344.
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    Cited by:

    1. G.M. Hasan Shahariar & Ock Taeck Lim, 2018. "A Study on Urea-Water Solution Spray-Wall Impingement Process and Solid Deposit Formation in Urea-SCR de-NO x System," Energies, MDPI, vol. 12(1), pages 1-18, December.
    2. Wang, Jun & Fu, Hang & Hu, Yipan & Cai, Yixi & Chen, Kerui, 2020. "Experiment investigation on the effects of air assisted SCR spray impingement on wall temperature evolution," Energy, Elsevier, vol. 204(C).
    3. Rogóż, Rafał & Kapusta, Łukasz Jan & Bachanek, Jakub & Vankan, Joseph & Teodorczyk, Andrzej, 2020. "Improved urea-water solution spray model for simulations of selective catalytic reduction systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 120(C).
    4. Kaźmierski, Bartosz & Kapusta, Łukasz Jan, 2023. "The importance of individual spray properties in performance improvement of a urea-SCR system employing flash-boiling injection," Applied Energy, Elsevier, vol. 329(C).
    5. Yuanhong Li & Qing Han & Dianxiu Xia & Linyu Gao & Jialei Hu & Hongyan Wang & Bin Yi, 2022. "Study of the Thermal Insulation and Flow Field of Vehicle Front Exhaust Pipe," Energies, MDPI, vol. 15(11), pages 1-12, May.

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