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A kinetic study of ...
A kinetic study of oxygen adsorption/desorption and NO oxidation over Pt/Al2O3 catalysts
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- Olsson, Louise, 1974 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Westerberg, Björn, 1962 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Persson, Hans (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Fridell, Erik, 1963 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Skoglundh, Magnus, 1965 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Andersson, Bengt, 1947 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 1999-11-10
- 1999
- Engelska.
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Ingår i: Journal of Physical Chemistry B Materials. - : American Chemical Society (ACS). - 1089-5647 .- 1520-6106 .- 1520-5207. ; 103:47, s. 10433-10439
- Relaterad länk:
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http://dx.doi.org/10...
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Laboratory tests and kinetic modeling were carried out in order to provide kinetic input data to a systematic investigation of the mechanism of nitrogen oxides (NO,) storage in catalysts used for lean-burn engines. In particular, we present a kinetic model of the NO oxidation to NO2 over a Pt/Al2O3 model catalyst for the temperature range 250-450 degrees C. Since the oxygen behavior at atmospheric pressure is critical for such a model, we have also studied the adsorption/desorption of oxygen by temperature-programmed desorption (TPD) experiments. The experiments show that oxygen starts to desorb at about 300 degrees C. Furthermore, the NO oxidation was studied in a temperature ramp with NO and oxygen in the gas feed. The data from this experiment and the above-determined values for the oxygen adsorption/desorption were used to construct a kinetic model for the NO oxidation. Finally, the model was validated with some transient experiments with either NO or NO2 and different oxygen concentrations in the gas feed. We found a good agreement between these experiments and the model.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
Nyckelord
- REDUCTION
- LEAN-BURN CONDITIONS
- ADSORPTION
- DISPERSION
- HIGH COVERAGES
- SURFACE
- PT(111)
- ATOMIC OXYGEN
- DESORPTION
- ALUMINA
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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