PROCESS FOR REMOVING GASEOUS CONTAMINANTS FROM A FEED GAS STREAM COMPRISING METHANE AND GASEOUS CONTAMINANTS

摘要

The invention provides a process for removing gaseous contaminants from a feed gas stream which comprises methane and gaseous contaminants, the process comprising: 1) providing the feed gas stream (1); 2) cooling the feed gas stream to a temperature at which liquid phase contaminant is formed as well as a methane enriched gaseous phase,- 3) separating the two phases obtained in step 2) by means of a gas/liquid separator (4); and 4) subjecting the methane enriched gaseous phase obtained in step 3) to a distillation treatment in a distillation section (10) thereby obtaining a bottom stream (12) rich in liquid phase contaminant and lean in methane, and a top stream (11) rich in methane and lean in gaseous contaminant. The invention further concerns a device for carrying out the present process, the purified gas stream, and a process for liquefying a feed gas stream.