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Träfflista för sökning "WFRF:(Andersson Magnus 1965 ) srt2:(1995-1999)"

Sökning: WFRF:(Andersson Magnus 1965 ) > (1995-1999)

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  • Olsson, Louise, 1974, et al. (författare)
  • A kinetic study of oxygen adsorption/desorption and NO oxidation over Pt/Al2O3 catalysts
  • 1999
  • Ingår i: Journal of Physical Chemistry B Materials. - : American Chemical Society (ACS). - 1089-5647 .- 1520-6106 .- 1520-5207. ; 103:47, s. 10433-10439
  • Tidskriftsartikel (refereegranskat)abstract
    • 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.
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  • Thormählen, Peter, 1969, et al. (författare)
  • Catalytic oxidation of CO in cold start emissions
  • 1998
  • Ingår i: 2nd World Congress on Environmental Catalysis as part of Topical Conference on Environmental Catalysis and Reaction Engineering in Miami Beach, Florida, USA, November 15-20, 1998..
  • Konferensbidrag (refereegranskat)
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  • Thormählen, Peter, 1969, et al. (författare)
  • Low temperature CO oxidation over platinum and cobalt oxide catalysts
  • 1999
  • Ingår i: Journal of Catalysis. - : Elsevier BV. - 0021-9517 .- 1090-2694. ; 188:2, s. 300-310
  • Tidskriftsartikel (refereegranskat)abstract
    • The low-temperature CO oxidation activity of three monolith catalysts (Pt/Al2O3, CoOx/Al2O3, and Pt/CoOx/Al2O3) has been studied. The catalytic properties of the catalysts were investigated by using different temperature-programmed methods: CO-TPD (desorption), TPO (oxidation), TPR (reduction), TPReaction, and CO light-off. Preoxidized cobalt-oxide-containing catalysts were found to be highly active for CO oxidation at temperatures as low as 200 K,and at these low temperatures the activity is independent of the presence of platinum. The catalytic properties and how they relate to the surface reaction kinetics are discussed.
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