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

Autor: Sandro Gierth, Sandra Hartl, Martin Pollack, Christian Hasse, Uwe Hofmann, Gennadi Zikoridse, Helge Rautenberg, Frank Will, Christoph Hahn, Sven Kureti
Rok vydání: 2022
Předmět:
Zdroj: Chemical Engineering & Technology. 45:610-619
ISSN: 1521-4125
0930-7516
Popis: 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.
Databáze: OpenAIRE
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