Abstract: A process for concentrating and recovering methane and carbon dioxide from landfill gas includes absorption of commonly occurring pollutants using a reduced amount of carbon dioxide absorbent which itself may be an in situ derived and recoverable constituent. Separated methane may be concentrated into a high heating value fuel, and a highly pure food-grade carbon dioxide product may also be recovered. Process streams may be used to provide fuel for compression and refrigeration and/or to regenerate carbon dioxide absorbent.
Type:
Grant
Filed:
October 28, 1997
Date of Patent:
December 1, 1998
Assignee:
Acrion Technologies, Inc.
Inventors:
Lawrence A. Siwajek, W. Jeffrey Cook, William R. Brown
Abstract: A process for concentrating and recovering methane and carbon dioxide from landfill gas includes absorption of commonly occurring pollutants using a reduced amount of carbon dioxide absorbent which itself may be an in situ derived and recoverable constituent. Separated methane may be concentrated into a high heating value fuel, and a highly pure food-grade carbon dioxide product may also be recovered. Process streams may be used to provide fuel for compression and refrigeration and/or to regenerate carbon dioxide absorbent.
Type:
Grant
Filed:
January 11, 1995
Date of Patent:
October 28, 1997
Assignee:
Acrion Technologies, Inc.
Inventors:
Lawrence A. Siwajek, W. Jeffrey Cook, William R. Brown