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Influence of the pl...
Influence of the platinum-support interaction on the direct reduction of NOx under lean conditions
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- Acke, Filip, 1968 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Westerberg, Björn, 1962 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Eriksson, Lars, 1965 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Johansson, Stefan, 1967 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Skoglundh, Magnus, 1965 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Fridell, Erik, 1963 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Smedler, Gudmund, 1956 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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show less...
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(creator_code:org_t)
- 1998
- 1998
- English.
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In: Studies in Surface Science and Catalysis. - 0167-2991. ; 116, s. 285-294
- Related links:
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Abstract
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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).
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
Keyword
- HYDROCARBONS
- SELECTIVE CATALYTIC REDUCTION
- PROPYLENE
- EXCESS OXYGEN
- ADSORPTION
- SPECTROSCOPY
- NITRIC-OXIDE
- CO
- RH/AL2O3
- STABILITY
Publication and Content Type
- art (subject category)
- ref (subject category)
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Acke, Filip, 196 ...
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Westerberg, Björ ...
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Eriksson, Lars, ...
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Johansson, Stefa ...
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Skoglundh, Magnu ...
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Fridell, Erik, 1 ...
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Smedler, Gudmund ...
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Chalmers University of Technology