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The water formation rate on platinum and palladium as a function of the surface hydrogen pressure from three-dimensional hydrogen pressure distributions
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology.
2001 (English)In: Applied Surface Science, ISSN 0169-4332, Vol. 180, no 1-2, 27-35 p.Article in journal (Refereed) Published
Abstract [en]

The water formation rate on platinum and palladium as a function of the reactant pressures at the catalytic surface has been determined from measurements of the three-dimensional hydrogen pressure distributions over the catalytic surface. Measurements were made for gas mixtures containing less than 1% of hydrogen and 20% of oxygen in argon at atmospheric pressure. The experiments were performed in a reactor with a simple and well-defined geometry which makes it possible to calculate the hydrogen pressure distribution in the entire region where measurements are made. The water formation rate as a function of the hydrogen pressure at the catalytic surface is obtained by comparing calculated hydrogen pressure distributions to measured ones. It is concluded that three-dimensional reactant pressure distributions can be used to accurately determine the reaction rate on a catalytic surface as a function of the reactant pressures at the surface. This is valuable for studies in the viscous pressure regime, where mass transfer limitations may be difficult to avoid. © 2001 Elsevier Science B.V.

Place, publisher, year, edition, pages
2001. Vol. 180, no 1-2, 27-35 p.
Keyword [en]
Mass transport, Palladium, Partial pressure distributions, Platinum, Water formation
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-47295DOI: 10.1016/S0169-4332(01)00312-9OAI: diva2:268191
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-13

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Ekedahl, Lars-Gunnar
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The Institute of TechnologyDepartment of Physics, Chemistry and Biology
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