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US 7,644,676 B2Granted
Storage tank containing liquefied natural gas with butane
AssigneeDaewoo Shipbuilding & Marine Engineering Co., Ltd.
InventorsJung Han Lee, Young Sik Moon, Dong Kyu Choi, Young Soo Kim
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Abstract
Disclosed is a liquefied natural gas composition. The composition contains methane, ethane and propane and butane. The composition contains a substantial amount of butane while being substantially free of hydrocarbon molecules larger than butane.
Claims13
A liquefied natural gas plant comprising:
- a storage tank;
- a liquefied natural gas composition contained in the storage tank, wherein the composition comprises methane, ethane, propane and butane, wherein the composition contains a substantial amount of butane while being substantially free of hydrocarbon molecules having a molecular weight larger than butane;
- and
- a natural gas processor configured to vaporize at least part of the composition and separate a substantial amount of propane and butane contained in the composition so as to obtain a vaporized natural gas and a separated hydrocarbon gas, wherein the separated hydrocarbon gas comprises the at least part of propane and butane separated from the liquefied natural gas, wherein the separated hydrocarbon gas has a heating value greater than that of the vaporized natural gas, wherein the heating value is measured in a unit of energy/mol.
1 more element
Dependencies are inferred from the claim text.