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

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

Applied Energy, 2017, vol. 205, issue C, 964-975

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.

Keywords: Selective catalytic reduction NOx; Urea water solution spray impingement; Solid deposits formation; Optical diagnostics; Nuclear magnetic resonance spectroscopy (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:205:y:2017:i:c:p:964-975

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DOI: 10.1016/j.apenergy.2017.08.088

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