05727903 is referenced by 41 patents and cites 22 patents.

A process and apparatus for purification and compression of raw landfill gas stream in a landfill to produce vehicle grade fuel. After the landfill gas stream is extracted and collected, all solids and significant moisture are removed in a pretreatment system prior to compression of the gas stream. The gas stream is then compressed to enhance the function of a membrane purification system. Additional moisture and compressor oil are removed. The gas stream is then heated to maintain any remaining moisture in vapor form. Volatile organic compounds and the balance of the compressor oil are removed from the gas stream by passing the gas stream across an activated carbon guard bed system. The resultant gas stream is fed to a multi-stage membrane system which separates the methane from the other constituents of the landfill gas stream including any remaining moisture. The resultant vehicle quality gas is then compressed to pressures acceptable for introduction and storage in motor vehicles converted to operate on compressed natural gas.

Title
Process and apparatus for purification and compression of raw landfill gas for vehicle fuel
Application Number
8/623229
Publication Number
5727903
Application Date
March 28, 1996
Publication Date
March 17, 1998
Inventor
Gordon Deane
Cohaset
MA, US
Geoff Smith
Olivehain
CA, US
Edward Borray
Los Angeles
CA, US
Agent
Tony D Chen
Thomas I Rozsa
Assignee
Palmer Management Corporation
MA, US
Genesis Energy Systems
CA, US
IPC
B01D 53/00
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