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KMID : 1024519960050050593
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Journal of the Environmental Sciences
1996 Volume.5 No. 5 p.593 ~ p.603
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Modified Agglomerated Film Model Applied to a Molten Carbonate Fuel Cell Cathode
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Lim Jun-Heok
Kim Tae-Keun
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Abstract
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A dual-porosity filmed agglomerate model for the porous cathode of the molten carbonate fuel has been investigated to predict the cell performance. A phenomenological treatment of molecular, kinetic and electrode parameters has been given. The major physical and chemical phenomena being modeled include mass transfer, ohmic losses and reaction kinetics at the electrode- electrolyte interface. The model predicts steady-state cell performance, given the above conditions that characterize the state of the electrode. Quasi-linearization and finite difference techniques are used to solve the coupled nonlinear differential equations. Also, the effective surface area of electrode pore was obtained by mercury porosimeter. The results of the investigation are presented in the form of plots of overpotential vs. current density with varied the electrode material, gas composition and mechanism. The predicted polarization curves are compared with the empirical data from 1 c cell. A fair correspondence is observed.
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KEYWORD
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Molten Carbonate Fuel Cell, Electrode, Model, Cathode
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