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Influence of the pl...
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Acke, Filip,1968Chalmers tekniska högskola,Chalmers University of Technology
(författare)
Influence of the platinum-support interaction on the direct reduction of NOx under lean conditions
- Artikel/kapitelEngelska1998
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LIBRIS-ID:oai:research.chalmers.se:2b60d556-d1d3-4eb3-be83-91c78db66b57
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https://research.chalmers.se/publication/154807URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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Ämneskategori:ref swepub-contenttype
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Catalysts containing Pt supported on SiC, Al2O3 and ZSM-5 were prepared and studied for NOx reduction by C3H6 in Oz excess under transient (temperature ramps) and steady-state conditions. The maximum NOx reduction activity in the heating ramp experiments was similar for Pt/SiC and Pt/ZSM-5, while Pt/Al2O3 showed higher maximum activity. Both N-2 and N2O formation was observed for all catalysts, although the respective amounts varied with the investigated system. Highest Nz selectivity was observed for Pt/Al2O3. When the NOx reduction activity was studied under steady-state conditions the activity of Pt/Al2O3 decreased substantially (mainly due to a loss in N-2 production). Pt/ZSM-5 became somewhat more selective towards Na production whereas the activity and selectivity of Pt/SiC remained at about the same values as far the heating ramp experiments. Adsorbed species on the surface of the different catalysts were investigated using in-situ FTIR in order to obtain information about the reaction mechanisms. The adsorption of species on Pt/SiC was negligible, while a number of absorption bands were observed for Pt/Al2O3 (N and C containing species, and -NCO) and Pt/ZSM-5 (HC).
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Westerberg, Björn,1962Chalmers tekniska högskola,Chalmers University of Technology
(författare)
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Eriksson, Lars,1965Chalmers tekniska högskola,Chalmers University of Technology
(författare)
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Johansson, Stefan,1967Chalmers tekniska högskola,Chalmers University of Technology
(författare)
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Skoglundh, Magnus,1965Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)skoglund
(författare)
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Fridell, Erik,1963Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)fridell
(författare)
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Smedler, Gudmund,1956Chalmers tekniska högskola,Chalmers University of Technology
(författare)
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Chalmers tekniska högskola
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Studies in Surface Science and Catalysis116, s. 285-2940167-2991
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