高温固体氧化物电解质燃料电池配方:燃料和氧化剂的非稳态利用

S.S. Sandhu, K. R. Hinkle
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引用次数: 0

摘要

本文提出的公式旨在应用于研究高温固体氧化物燃料电池(SOFC)的瞬态行为,特别是燃料和氧化剂反应物的非稳态消耗。具体来说,在固定电池电流水平的等温条件下,可以预测电池阳极侧燃料室(氢气)和阴极侧氧化剂室(空气中的氧气)中的化学物种瞬时数量、摩尔分数和总压力。所开发的公式还能分别预测电池多孔阳极和阴极中燃料(氢)和氧化剂(氧)的瞬时分子分数曲线,从而深入了解反应物物种在电池多孔电极中通过电化学反应的有效传输和利用情况。所介绍的配方可适用于任何高温 SOFC 中的任何燃料和氧化剂组合。
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High Temperature Solid Oxide Electrolyte Fuel Cell Formulation: Non-Steady State Utilization of Fuel and Oxidant
The formulation presented in this paper was developed with the objective of its application to investigate the transient behavior of a high temperature solid oxide fuel cell (SOFC); especially with respect to the non-steady state consumption of fuel and oxidant reactants. Specifically, the chemical species transient amounts, their mole fractions, and total pressures in the cell anode-side fuel- (hydrogen) and cathode-side oxidant- (oxygen of the air) chambers can be predicted under the isothermal condition at a fixed cell-current level. The developed formulation is also capable of predicting the transient mole fraction profiles of fuel (hydrogen) and oxidant (oxygen) in the cell porous anode and cathode, respectively; thus, providing insight into the reactant species' effective transport and their utilization, via electrochemical reactions, in the cell porous electrodes. The presented formulation can be adapted for any fuel and oxidant combinations in any high temperature SOFC.
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