Enhanced hydrogen recovery from effluent gas streams
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United States of America Patent
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-
Nov 19, 1985
Grant Date -
N/A
app pub date -
Feb 7, 1984
filing date -
Feb 7, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Effluent gas streams for steam reforming, partial oxidation or coal gasification operations are advantageously treated in shift conversion, scrubbing and pressure swing adsorption units for recovery of a purified, hydrogen-containing product gas stream. By recycling a portion of the waste gas removed from the pressure swing adsorption system to the shift conversion unit and/or to the effluent gas generation operation, enhanced product recovery is achieved without the necessity for employing low temperature shift or for achieving essentially complete removal of the carbon dioxide content of the gas being treated prior to its passage to said pressure swing adsorption system.
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