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US 8,282,707 B2Granted
Natural gas purification system
AssigneeUop LLC
InventorsLeonid Bresler, John M. Foresman, William I. Echt, Mark E. Schott
Life of this patent
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Abstract
The present invention relates to an integrated membrane/absorbent/adsorbent process and system for removal of mercury and sulfur compounds from natural gas on a ship that houses natural gas purification equipment. First mercury and most of the sulfur compounds are removed by an adsorbent bed and then the natural gas stream passes through a membrane unit to produce a partially purified natural gas residue stream to be dried and then liquefied and a carbon dioxide permeate stream that can be used as a fuel gas.
Claims7
A process of treating a natural gas stream comprising:
- a) sending said natural gas stream to a ship, barge or platform;
- b) then sending said natural gas stream to a membrane unit on said ship, barge or platform to remove carbon dioxide and other impurities from said natural gas stream to produce a permeate stream comprising a higher concentration of said carbon dioxide and other impurities and a residue stream comprising a partially purified natural gas stream that has a lower concentration of said carbon dioxide and other impurities;
- c) then sending said partially purified natural gas stream to a solvent based absorption unit to remove carbon dioxide and additional sulfur containing impurities to produce a purified natural gas stream;
- and
- d) then sending said purified natural gas stream to an adsorbent bed to remove water vapor from said purified natural gas stream prior to liquefaction of said natural gas stream.
2 more elements
Dependencies are inferred from the claim text.