|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||62/23 ; 55/16 ; 55/23 ; 55/57|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 80 인용 특허 : 5|
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...
A recycle process for the separation of a landfill feed gas stream, having a high concentration of methane and carbon dioxide and containing undesirable trace gas impurities, into a fuel-or sales-grade gas methane product stream and a liquid carbon dioxide product stream, which process comprises: (a) introducing an essentially hydrogen-free, dried, compressed, landfill feed gas stream into a cryogenic distillation column; (b) withdrawing a methane-enriched overhead product stream from said distillation column; (c) withdrawing an enriched liquid carbon di...