CATALYTIC HYDROGEN COMBUSTOR
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United States of America Patent
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Jul 9, 2015
app pub date -
Jun 28, 2012
filing date -
Jun 28, 2012
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Abstract
A catalytic hydrogen combustor is disclosed that is adapted to combust substantially all the hydrogen in the fuel cell exhaust gas during both steady state operation and for short duration higher hydrogen concentration pulses. Hydrogen combustion is catalyzed in two zones, a first zone in which a lower level of catalyst activity is used to catalyze combustion of a higher concentration hydrogen pulse as it moves through the zone and a second zone in which a higher level of catalyst activity is used to catalyze combustion of a lower concentration of hydrogen that is characteristic of steady state fuel cell operation.
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