The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 29, 2000
Filed:
May. 04, 1999
Richard G Mallinson, Norman, OK (US);
Kenneth E Starling, Norman, OK (US);
Jeffrey H Harwell, Norman, OK (US);
The Board of Regents of The University of Oklahoma, Norman, OK (US);
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.