Process for the separation of landfill gas
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United States of America Patent
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Jul 21, 1987
Issued Date -
N/A
app pub date -
Jan 24, 1986
filing date -
May 31, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A recycle process for the separation of landfill gas containing a wide variety of impurities into a carbon dioxide product stream and a fuel-grade-pressurized methane product stream, the process providing for the removal of both the impurities and the carbon dioxide in a cryogenic column as a bottom stream, the separation of the methane from the overhead product stream by a membrane process, and, optionally, the removal of impurities from the carbon dioxide bottom stream in a separate purification column, to recover a high-quality, liquid, carbon dioxide stream.
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