Critical role of water in the direct oxidation of CO and hydrocarbons in diesel exhaust after treatment catalysis

Roberto Caporali; Sarayute Chansai; Robbie Burch; Juan Jose Delgado; Alexandre Goguet; Christopher Hardacre; Loredana Mantarosie; David Thompsett

doi:10.1016/j.apcatb.2013.10.004

Critical role of water in the direct oxidation of CO and hydrocarbons in diesel exhaust after treatment catalysis

Roberto Caporali, Sarayute Chansai, Robbie Burch, Juan Jose Delgado, Alexandre Goguet, Christopher Hardacre, Loredana Mantarosie, David Thompsett

School of Chemistry and Chemical Engineering

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

239 Downloads (Pure)

Abstract

CO and C3H6 oxidation have been carried out in the absence and presence of water over a Pd/Al2O3catalyst. It is clear that water promotes CO and, as a consequence, C3H6oxidation takes place at muchlower temperatures compared with the dry feed. The significant increase in the catalyst’s activity withrespect to CO oxidation is not simply associated with changes in surface concentration as a result ofcompetitive adsorption effects. Utilising18O2as the reactant allows the pathways whereby the oxidationdue to gaseous dioxygen and where the water activates the CO and C3H6to be distinguished. In thepresence of water, the predominant pathway is via water activation with C16O2and C16O18O being themajor species formed and oxidation with dioxygen plays a secondary role. The importance of wateractivation is further supported by the significant decrease in its effect when using D2O versus H2O.

Original language	English
Pages (from-to)	764-769
Number of pages	6
Journal	Applied Catalysis B: Environmental
Volume	147
Early online date	11 Oct 2013
DOIs	https://doi.org/10.1016/j.apcatb.2013.10.004
Publication status	Published - 05 Apr 2014

Keywords

Propene
Carbon monoxide
Palladium
Water
Deuterium oxide
Isotope
Oxidation

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology
Environmental Science(all)

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10.1016/j.apcatb.2013.10.004

Critical role of water in the direct oxidation of CO and hydrocarbons in diesel exhaust after treatment catalysis
© 2013 The Authors. Published by Elsevier B.V. This article is available under the terms of the Creative Commons Attribution License (CC BY 3.0) http://creativecommons.org/licenses/by/3.0/ You may distribute and copy the article, create extracts, abstracts, and other revised versions, adaptations or derivative works of or from an article (such as a translation), to include in a collective work (such as an anthology), to text or data mine the article, including for commercial purposes without permission from Elsevier. The original work must always be appropriately credited.
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1 Finished

R1967CHM: Castech <CHEM/MATHS>
Goguet, A., Hardacre, C., Hu, P., James, S., Kohanoff, J., Lagunas-Castedo, C., Marr, A., Paxton, A., Rooney, D., Shekhtman, S., Sheldrake, G. & Thompson, J.
01/08/2008 → 31/12/2014
Project: Research

Alexandre Goguet
- a.goguet@qub.ac.uk
- School of Chemistry and Chemical Engineering - Professor
Person: Academic

Cite this

@article{54a49cc979e546b2b51dbd611b59e1a7,

title = "Critical role of water in the direct oxidation of CO and hydrocarbons in diesel exhaust after treatment catalysis",

abstract = "CO and C3H6 oxidation have been carried out in the absence and presence of water over a Pd/Al2O3catalyst. It is clear that water promotes CO and, as a consequence, C3H6oxidation takes place at muchlower temperatures compared with the dry feed. The significant increase in the catalyst{\textquoteright}s activity withrespect to CO oxidation is not simply associated with changes in surface concentration as a result ofcompetitive adsorption effects. Utilising18O2as the reactant allows the pathways whereby the oxidationdue to gaseous dioxygen and where the water activates the CO and C3H6to be distinguished. In thepresence of water, the predominant pathway is via water activation with C16O2and C16O18O being themajor species formed and oxidation with dioxygen plays a secondary role. The importance of wateractivation is further supported by the significant decrease in its effect when using D2O versus H2O.",

keywords = "Propene, Carbon monoxide, Palladium, Water, Deuterium oxide, Isotope, Oxidation",

author = "Roberto Caporali and Sarayute Chansai and Robbie Burch and Delgado, {Juan Jose} and Alexandre Goguet and Christopher Hardacre and Loredana Mantarosie and David Thompsett",

year = "2014",

month = apr,

day = "5",

doi = "10.1016/j.apcatb.2013.10.004",

language = "English",

volume = "147",

pages = "764--769",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

publisher = "Elsevier",

}

Critical role of water in the direct oxidation of CO and hydrocarbons in diesel exhaust after treatment catalysis. / Caporali, Roberto; Chansai, Sarayute; Burch, Robbie; Delgado, Juan Jose; Goguet, Alexandre; Hardacre, Christopher; Mantarosie, Loredana; Thompsett, David.

In: Applied Catalysis B: Environmental, Vol. 147, 05.04.2014, p. 764-769.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Critical role of water in the direct oxidation of CO and hydrocarbons in diesel exhaust after treatment catalysis

AU - Caporali, Roberto

AU - Chansai, Sarayute

AU - Burch, Robbie

AU - Delgado, Juan Jose

AU - Goguet, Alexandre

AU - Hardacre, Christopher

AU - Mantarosie, Loredana

AU - Thompsett, David

PY - 2014/4/5

Y1 - 2014/4/5

N2 - CO and C3H6 oxidation have been carried out in the absence and presence of water over a Pd/Al2O3catalyst. It is clear that water promotes CO and, as a consequence, C3H6oxidation takes place at muchlower temperatures compared with the dry feed. The significant increase in the catalyst’s activity withrespect to CO oxidation is not simply associated with changes in surface concentration as a result ofcompetitive adsorption effects. Utilising18O2as the reactant allows the pathways whereby the oxidationdue to gaseous dioxygen and where the water activates the CO and C3H6to be distinguished. In thepresence of water, the predominant pathway is via water activation with C16O2and C16O18O being themajor species formed and oxidation with dioxygen plays a secondary role. The importance of wateractivation is further supported by the significant decrease in its effect when using D2O versus H2O.

AB - CO and C3H6 oxidation have been carried out in the absence and presence of water over a Pd/Al2O3catalyst. It is clear that water promotes CO and, as a consequence, C3H6oxidation takes place at muchlower temperatures compared with the dry feed. The significant increase in the catalyst’s activity withrespect to CO oxidation is not simply associated with changes in surface concentration as a result ofcompetitive adsorption effects. Utilising18O2as the reactant allows the pathways whereby the oxidationdue to gaseous dioxygen and where the water activates the CO and C3H6to be distinguished. In thepresence of water, the predominant pathway is via water activation with C16O2and C16O18O being themajor species formed and oxidation with dioxygen plays a secondary role. The importance of wateractivation is further supported by the significant decrease in its effect when using D2O versus H2O.

KW - Propene

KW - Carbon monoxide

KW - Palladium

KW - Water

KW - Deuterium oxide

KW - Isotope

KW - Oxidation

U2 - 10.1016/j.apcatb.2013.10.004

DO - 10.1016/j.apcatb.2013.10.004

M3 - Article

VL - 147

SP - 764

EP - 769

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

SN - 0926-3373

ER -

Critical role of water in the direct oxidation of CO and hydrocarbons in diesel exhaust after treatment catalysis

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

R1967CHM: Castech <CHEM/MATHS>

Alexandre Goguet

Cite this