Patent ID: 7726133

Claim:
A method for operating a burner of a gas turbine, comprising: gassifying a fossil fuel; and feeding gasified fossil fuel as synthesis gas to the burner assigned to the gas turbine in order to be burnt, wherein the synthesis gas is provided in a first part stream and a second part stream that branches from the first part stream, the first part stream is controlled by a first control fitting, the first control fitting being a butterfly valve, located downstream of a location where the second part stream branches from the first part stream and the second part stream is controlled by a second control fitting, the second control fitting being a globe valve, in the second part stream, the first part stream is carried by a first fuel passage in the burner and the second part stream is carried by a second fuel passage in the burner, the second fuel passage having a greater flow resistance than the first fuel passage and is arranged for also carrying a natural fuel to the burner, and the control streams are fed separately to the burner to be burnt.