High energy density storage of methane in light hydrocarbon solu

Chemistry of hydrocarbon compounds – Product blend – e.g. – composition – etc. – or blending process... – Fluent dielectric

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585 14, 481273, C10L 300

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active

061111546

ABSTRACT:
Method for storing methane in light hydrocarbons at moderate temperatures and pressures such that the resulting solution has a high energy density. The method includes combining methane at a 50 to 80 mole percent concentration with a light hydrocarbon, such as butane, propane or liquid petroleum gas (LPG). Then the resulting solution is maintained at a temperature of between -1.degree. C. and 38.degree. C. and a pressure of between 8 and 14 MPa. Under these parameters, the solution has an energy density which is 40 to 67 percent that of gasoline. A motor vehicle fuel storage apparatus for the method includes an insulated storage tank containing the 50 to 80 mole percent methane solution and a cooling mechanism for maintaining the methane solution between -1.degree. C. and 38.degree. C. The cooling mechanism may be an arrangement of expansion valves, or connection to the air conditioning system of the vehicle, or both.

REFERENCES:
patent: 3760597 (1973-09-01), Becker
patent: 5315054 (1994-05-01), Teel
patent: 5900515 (1999-05-01), Mallinson et al.

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