Abstract
The impact of microstructure on effective diffusion coefficients in porous ceramic materials is not well understood. This information has particular relevance to the performance of Solid Oxide Fuel Cell designs in which the anode is supported on a porous ceramic, or is itself the support for the cell. This is especially so when the cell operates under conditions of high fuel utilisation and/or high current density. Under such conditions, the diffusion of reactants towards the fuel cell anode, and products away through the support, may well limit performance. Data on the porosity, pore size characteristics and microstructure for two porous ceramic support materials are given. Effective diffusion coefficients for two binary mixtures of fuel gases (H2, N2, CO2,) are presented.
| Original language | English |
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| Publication status | Published - 2002 |
| Event | 5th Solid Oxide Fuel Cell Forum - Lucerne, Lucerne, Switzerland Duration: 1 Jul 2002 → 5 Jul 2002 Conference number: 5th |
Conference
| Conference | 5th Solid Oxide Fuel Cell Forum |
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| Country/Territory | Switzerland |
| City | Lucerne |
| Period | 1/07/02 → 5/07/02 |