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Evaluation of kinetic models for the partial oxidation of methane to synthesis gas over a Pt/PrCeZrOx catalyst coated on a triangular monolith
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Gubanova, Elena L., Schuurman, Yves, Sadykov, Vladislav A., Mirodatos, Claude and van Veen, André C. (2009) Evaluation of kinetic models for the partial oxidation of methane to synthesis gas over a Pt/PrCeZrOx catalyst coated on a triangular monolith. Chemical Engineering Journal, Vol.154 (No.1-3). pp. 174-184. doi:10.1016/j.cej.2009.05.038 ISSN 1385-8947.
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Official URL: http://dx.doi.org/10.1016/j.cej.2009.05.038
Abstract
The evaluation of kinetic models for the partial oxidation of methane to synthesis gas over a 1.4-wt% Pt/Pr0.3Ce0.35Zr0.35Ox catalyst coated on the surface of a triangular corundum channel is presented. The mathematical form of the tested models accounts for global surface steps. The formulation of reaction steps for two cases proposed in the literature contained lumped formulations to restrict reasonably the number of parameters to estimate. One mechanism considering an oxygen assisted methane activation and another considering methane dissociation without oxygen involvement were tested. In both cases a satisfying description of the experimental data was possible, suggesting that the initial activation of methane is of less importance for the overall progress of the partial oxidation than the oxidation of carbonaceous intermediates to adsorbed carbon monoxide assumed in both cases. Comparing the kinetics over unsupported platinum extensively reported in literature to the data over the 1.4-wt% Pt/Pr0.3Ce0.35Zr0.35Ox catalyst in this work reveals significantly different rates for oxygen adsorption and carbon monoxide oxidation. These differences are explained by considering the active role the ceria plays in the catalyst performance.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
Journal or Publication Title: | Chemical Engineering Journal | ||||
Publisher: | Elsevier BV | ||||
ISSN: | 1385-8947 | ||||
Official Date: | 15 November 2009 | ||||
Dates: |
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Volume: | Vol.154 | ||||
Number: | No.1-3 | ||||
Page Range: | pp. 174-184 | ||||
DOI: | 10.1016/j.cej.2009.05.038 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Description: | Special issue: Proceedings of the 18th International Conference on Chemical Reactors, Malta, September 29 - October 3, 2008. |
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Version or Related Resource: | Based of a paper given at the 18th International Conference on Chemical Reactors, Malta, September 29 - October 3, 2008. |
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