Thermally integrated reformer for solid oxide fuel cells
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United States of America Patent
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Nov 22, 1994
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N/A
app pub date -
Oct 6, 1993
filing date -
Oct 6, 1993
priority date (Note) -
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Abstract
A thermally integrated reformer (10) is located inside the stack furnace (12), housing stacks (14) of solid oxide fuel cells (16). The energy to support the endothermic reformation reaction converting hydrocarbon and water feedstock into hydrogen and carbon monoxide fuel is supplied by heat recuperated from the oxidation process in the stack (14) of fuel cells (16). The source of hydrocarbons is de-sulfurized natural gas. Heat transfers to the incrementally shielded packed beds (30, 60) of the reactors (18, 19) of the reformer (10) by radiation from the stacks (14) and furnace wall (38) and by forced convection from the exhausting airflow exiting the stack furnace (12). Temperature gradients in the reformer (10) are controlled by selective (or incremented) radiation shielding (20) and by counterflow heat exchange to prevent excessive premature cracking in the reformer where carbonization would clog interstices and render the catalyst granules (32) ineffective.
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