University of Oklahoma

Kenneth E Starling

Jeffrey H Harwell

Richard G Mallinson

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.

Growing community of inventors

Norman, OK, United States of America

Kenneth E Starling