Concept of vaporized urea dosing in selective catalytic reduction / Rafal Sala, Piotr Bielaczyc, Marek Brzezanski // W: Selective catalytic reduction of NOx : [printed edition of the special issue published ... więcej

Concept of vaporized urea dosing in selective catalytic reduction / Rafal Sala, Piotr Bielaczyc, Marek Brzezanski // W: Selective catalytic reduction of NOx : [printed edition of the special issue published in Catalysts] [Dokument elektroniczny] / ed. Oliver Kröcher. – Basel Switzerland : MDPI, 2018. – (Catalysts, ISSN 2073-4344). – S. 5-14 : rys., wykr. – Tryb dostępu: https://www.mdpi.com/books/pdfview/book/1029. – Bibliogr. 25 poz. – doi: 10.3390/books978-3-03897-365-2. – ISBN ISBN 978-3-03897-364-5 (Pbk). – ISBN ISBN 978-3-03897-365-2 (PDF)

This work tried to identify the influence of dosing vaporized urea solution in a selective catalytic reduction (SCR) system. In the SCR method, optimising the urea evaporation and mixing properties can ... więcej

This work tried to identify the influence of dosing vaporized urea solution in a selective catalytic reduction (SCR) system. In the SCR method, optimising the urea evaporation and mixing properties can significantly improve the NOx conversion efficiency in the catalyst. It can also exert a positive effect on the uniformity of NH3 concentration distribution across the catalyst face. The concept of an electrically evaporated urea-dosing system was investigated and it was found that urea pre-heating prior to introduction into the exhaust gas is favourable for enhancing NOx removal under steady-state and transient engine operation. In the urea evaporating system the heatingchamberwasofacylindricaltubeshapeandtheureavapourwasintroducedintotheexhaust by means of a Venturi orifice. The concept urea dosing was only a custom-made solution, but proved to be superior to the regular dosing system operating in the liquid phase.