Studies to the functioning of automotive exhaust catalysts using in-situ positron emission tomography

K.A. Vonkeman, G. Jonkers, R.A. Santen, van

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

6 Citaten (Scopus)
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Samenvatting

To elucidate reaction kinetics in exhaust catalysis, the application of a technique stemming from nuclear medicine, i.e., Positron Emission Tomog., was developed. Short lived positron emitting nuclides 11C (t1/2 = 20 min), 13N (t1/2 = 10 min) and 15O (t1/2 = 2 min) were used to synthesize actual reactant mols. such as 11CO, 11CO2, 11CH4, 13N2, 15OO, C15O, and C15OO. The labeled reactants could be monitored in a catalyst bed right through the reactor wall using a Positron Emission Tomograph, with a resoln. of 1 cm in place of 1 s in time. Thus, a large amt. of information on the residence time of the reactants is obtained directly from the catalyst surface under actual reaction conditions. The mechanism and the rate limiting step in the CO oxidn. on Pt under cold start conditions of a car was studied. A strong interaction was found between gas phase CO2 and CeO2 at the catalyst surface, whereby the O atoms contained in lattice CeO2 exchange rapidly with the O atoms of the adsorbed CO2
Originele taal-2Engels
TitelCAPoC : international symposium on catalysis and automotive pollution control : proceedings, 2nd, Brussels, Belgium, September 10-13, 1990
RedacteurenA. Crucq
Plaats van productieAmsterdam
UitgeverijElsevier
Pagina's239-252
ISBN van geprinte versie0-444-88787-3
DOI's
StatusGepubliceerd - 1991
Evenementconference; CAPOC ; 2 (Brüssel/Belgien) : 1990.09.10-13; 1990-09-10; 1990-09-13 -
Duur: 10 sep 199013 sep 1990

Publicatie series

NaamStudies in Surface Science and Catalysis
Volume71
ISSN van geprinte versie0167-2991

Congres

Congresconference; CAPOC ; 2 (Brüssel/Belgien) : 1990.09.10-13; 1990-09-10; 1990-09-13
Periode10/09/9013/09/90
AnderCAPOC ; 2 (Brüssel/Belgien) : 1990.09.10-13

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  • Citeer dit

    Vonkeman, K. A., Jonkers, G., & Santen, van, R. A. (1991). Studies to the functioning of automotive exhaust catalysts using in-situ positron emission tomography. In A. Crucq (editor), CAPoC : international symposium on catalysis and automotive pollution control : proceedings, 2nd, Brussels, Belgium, September 10-13, 1990 (blz. 239-252). (Studies in Surface Science and Catalysis; Vol. 71). Elsevier. https://doi.org/10.1016/S0167-2991(08)62982-1