HELIUM RECOVERY FROM STREAMS CONTAINING HELIUM, CARBON DIOXIDE, AND AT LEAST ONE OF NITROGEN AND METHANE
Systems and methods are provided for recovering helium from a feed comprising helium, carbon dioxide, and at least one of nitrogen and methane. The feed is separated in a first separator to form helium-enriched stream and a CO 2 -enriched stream. The helium-enriched stream is separated in a pressure...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | Systems and methods are provided for recovering helium from a feed comprising helium, carbon dioxide, and at least one of nitrogen and methane. The feed is separated in a first separator to form helium-enriched stream and a CO 2 -enriched stream. The helium-enriched stream is separated in a pressure swing adsorption unit to form a helium-rich product stream and a helium-lean stream. At least a portion of the helium-lean stream is recycled to the first separator with the feed. In some embodiments, a membrane separation unit is used to enhance helium recovery. |
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