| 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; 2) cooling the feed gas stream to a first 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 first gas/liquid separator; 4) cooling the methane enriched gaseous phase obtained in step 3) at least party by means of an external refrigerant to a second temperature at which liquid phase contaminant is formed as well as a methane enriched gaseous phase; and 5) separating the two phases obtained in step 4) by means of a second gas/liquid separator. 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.
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