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Urea Conversion for Low‐Temperature Selective Catalytic Reduction in a Swirled Diesel Exhaust Gas Configuration

Gierth, Sandro ; Hartl, Sandra ; Pollack, Martin ; Hasse, Christian ; Hofmann, Uwe ; Zikoridse, Gennadi ; Rautenberg, Helge ; Will, Frank ; Hahn, Christoph ; Kureti, Sven (2022):
Urea Conversion for Low‐Temperature Selective Catalytic Reduction in a Swirled Diesel Exhaust Gas Configuration. (Publisher's Version)
In: Chemical Engineering & Technology, 45 (4), pp. 610-619. Wiley-VCH, e-ISSN 1521-4125,
DOI: 10.26083/tuprints-00021538,
[Article]

Abstract

A novel design of an AdBlue mixing unit to reduce urea deposits at low temperatures in diesel exhaust is described. The main principle of the mixer includes the injection of AdBlue in an axisymmetric swirling flow, which is achieved by splitting the exhaust stream and off‐centred introduction of the sub‐flows. Crucial geometric parameters were analyzed by computational fluid dynamics (CFD) simulations towards pressure loss, flow field, and spray morphology. Deposit formation was experimentally investigated on three upscaling levels implying an optical test bench, a diesel engine test bench, and a hydraulic excavator. In particular, the studies with the hydraulic excavator showed neither deposits nor critical back pressure. Overall, the experiments substantiated the working principle of the AdBlue mixer.

Item Type: Article
Erschienen: 2022
Creators: Gierth, Sandro ; Hartl, Sandra ; Pollack, Martin ; Hasse, Christian ; Hofmann, Uwe ; Zikoridse, Gennadi ; Rautenberg, Helge ; Will, Frank ; Hahn, Christoph ; Kureti, Sven
Origin: Secondary publication DeepGreen
Status: Publisher's Version
Title: Urea Conversion for Low‐Temperature Selective Catalytic Reduction in a Swirled Diesel Exhaust Gas Configuration
Language: English
Abstract:

A novel design of an AdBlue mixing unit to reduce urea deposits at low temperatures in diesel exhaust is described. The main principle of the mixer includes the injection of AdBlue in an axisymmetric swirling flow, which is achieved by splitting the exhaust stream and off‐centred introduction of the sub‐flows. Crucial geometric parameters were analyzed by computational fluid dynamics (CFD) simulations towards pressure loss, flow field, and spray morphology. Deposit formation was experimentally investigated on three upscaling levels implying an optical test bench, a diesel engine test bench, and a hydraulic excavator. In particular, the studies with the hydraulic excavator showed neither deposits nor critical back pressure. Overall, the experiments substantiated the working principle of the AdBlue mixer.

Journal or Publication Title: Chemical Engineering & Technology
Volume of the journal: 45
Issue Number: 4
Place of Publication: Darmstadt
Publisher: Wiley-VCH
Uncontrolled Keywords: AdBlue mixing unit, Diesel exhaust, Selective catalytic reduction, Swirling flow, Urea deposits
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Simulation of reactive Thermo-Fluid Systems (STFS)
Date Deposited: 01 Jul 2022 11:42
DOI: 10.26083/tuprints-00021538
URL / URN: https://tuprints.ulb.tu-darmstadt.de/21538
URN: urn:nbn:de:tuda-tuprints-215383
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