Systems and methods for maintaining hydrogen-selective membranes during periods of inactivity
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United States of America Patent
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Mar 18, 2014
Grant Date -
Apr 12, 2012
app pub date -
Oct 11, 2010
filing date -
Oct 11, 2010
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Abstract
The present disclosure is directed to systems and methods for maintaining hydrogen-selective membranes during periods of inactivity. These systems and methods may include heating and maintaining at least the hydrogen-selective membrane of a hydrogen-producing fuel processing system in a thermally buffered state and/or controlling the chemical composition of the gas streams that may come into contact with the hydrogen-selective membrane. Controlling the chemical composition of the gas streams that may come into contact with the hydrogen-selective membrane may include maintaining a positive pressure of an inert, blanket, reducing, and/or non-oxidizing gas within the membrane separation assembly and/or periodically supplying a reducing gas stream to the membrane separation assembly. These systems and methods may further include periodically supplying a feed stream to a hydrogen-producing region of the hydrogen-producing fuel processing system to produce a mixed gas stream and supplying the mixed gas stream to the membrane separation assembly.
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