Emulsion fuels and their use in gas turbines
AssigneeQuadrise Limited
InventorsPeter Jeremy Dodd, Alan Stockwell
Life of this patent
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Abstract
A gas turbine is driven by combustion of a fuel which is a hydrocarbon oil-in-water emulsion. Successful operation is achieved with minimized corrosion of turbine blades by keeping the Na+ content of the emulsion to less than 1 ppm. Deionized water is generally to be used in making up the emulsion. Heavy oils can be used because their conversion to oil-in-water emulsion form makes them suited to the pre-atomization requirements of gas turbine combustion.
Claims24
A method of driving a gas turbine comprising combusting a gas turbine fuel composition including a pre-atomized hydrocarbon oil-in-deionized water emulsion in a combustor of the turbine, with the emulsion containing less than 1 ppm of sodium ions and the hydrocarbon oil having a kinematic viscosity of from 5×103 to 5×106cSt at 25° C.
A method of preparing a gas turbine fuel composition for use in a gas turbine, said method comprising the steps of:
- (a) selecting a hydrocarbon fuel oil with a kinematic viscosity at 25° C. in the range of from 5×103 to 5×106 cSt;
- (b) washing the hydrocarbon fuel oil to remove excess sodium ions;
- and
- (c) forming an emulsion of the washed hydrocarbon fuel oil from step (b) in deionized water, with the emulsion containing less than 1 ppm of sodium ions.
A method of driving a gas turbine comprising the steps of:
- (a) selecting a hydrocarbon fuel oil with a kinematic viscosity at 25° C. in the range of from 5×103 to 5×106 cSt;
- (b) forming a gas turbine fuel composition as an emulsion of the hydrocarbon fuel oil in deionized water, the emulsion containing less than 1 ppm of sodium ions;
- and
- (c) combusting the hydrocarbon oil-in-deionized water emulsion produced in step (c) in a combustor of the gas turbine.
Dependencies are inferred from the claim text.