Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Simultaneous removal of NOx and soot particulate from diesel exhaust by in-situ catalytic generation and utilisation of N2O

Davies, Catherine, Thompson, Kate, Cooper, Anna, Golunski, Stanislaw ORCID: https://orcid.org/0000-0001-7980-8624, Taylor, Stuart H ORCID: https://orcid.org/0000-0002-1933-4874, Bogarra Macias, Maria, Doustdar, Omid and Tsolakis, Athanasios 2018. Simultaneous removal of NOx and soot particulate from diesel exhaust by in-situ catalytic generation and utilisation of N2O. Applied Catalysis B: Environmental 239 , pp. 10-15. 10.1016/j.apcatb.2018.07.072

[thumbnail of 1-s2.0-S0926337318307136-main FINAL.pdf]
Preview
PDF - Published Version
Available under License Creative Commons Attribution.

Download (1MB) | Preview

Abstract

One of the outstanding challenges in diesel exhaust catalysis is to integrate oxidation chemistry, soot filtration and NOx reduction in a single aftertreatment unit, while avoiding the need for fuel injection to regenerate the filter. Here we show that destruction of trapped soot can be initiated catalytically at 200 °C when its oxidation is coupled with non-selective NOx reduction (using NH3 as reductant), which acts as an in-situ source of N2O. In laboratory tests over an extended temperature range (up to 800 °C), using supported silver as a catalyst for both non-selective NOx-reduction and soot oxidation, the conversion of immobilised soot to CO2 can be resolved into four consecutive steps as the temperature rises: catalysed oxidation by N2O; non-catalysed oxidation by NO2; catalysed oxidation by O2; non-catalysed oxidation by O2. Initial engine tests indicate that the critical first step (C + N2O) can be replicated in a diesel exhaust.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Cardiff Catalysis Institute (CCI)
Chemistry
Publisher: Elsevier
ISSN: 0926-3373
Funders: EPSRC
Date of First Compliant Deposit: 31 July 2018
Date of Acceptance: 27 July 2018
Last Modified: 08 May 2023 22:06
URI: https://orca.cardiff.ac.uk/id/eprint/113789

Citation Data

Cited 34 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item

Downloads

Downloads per month over past year

View more statistics