MASS TRANSFER IN GAS-SPARGED POROUS ELECTRODES |
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Authors: | Ken Takahashi Richard Alkire |
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Affiliation: | a Department of Chemical Engineering, University of Illinois, Urbana |
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Abstract: | The electrochemical limiting current method was used to measure mass transfer coefficients with cocurrent upward gas-liquid flow in packed bed electrodes. Liquid-solid and overall gas-solid coefficients were determined from limiting current data in the presence of inert or reactive gas flows with the use of a plug flow model. The presence of inert gas flow increased mass transfer coefficients over those in single-phase flow by a factor of up to 1.7. As a result of boundary layer penetration by gas bubbles, sparging with reactive gas increased mass transfer rates by a factor of up to 3.5. |
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Keywords: | Porous electrodes Gas sparging Mass transfer |
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