Gas refining method using a pressure swing adsorption method
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United States of America Patent
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Oct 24, 2000
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N/A
app pub date -
Nov 10, 1998
filing date -
Nov 11, 1997
priority date (Note) -
Expired
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Abstract
In a gas refining method using a PSA method, a cleaning step is divided into a preparatory cleaning step and a substantial cleaning step, and an exhaust gas (particularly a high concentration gas obtained in the latter half is effective) obtained in the substantial cleaning step is used as a gas to be admitted into an adsorption column in the preparatory cleaning step. This method is employed, for example, to refine carbon monoxide from a material gas containing carbon monoxide. Accordingly, the gas refining method using the PSA method can ensure a specified amount of collected gas product without resulting in an increase in the amount of adsorbent even if a low concentration material gas is used.
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