Method for supplying fuel to at least one gas turbine combustion chamber and associated fuel supply system

A method for supplying fuel to at least one combustion chamber of a gas turbine, the method comprising:

• directing a blend of hydrocarbon and hydrogen into a supply line connected to the at least one combustion chamber;
• separating the blend of hydrocarbon and hydrogen in a bypass circuit connected to the supply line for obtaining hydrogen and obtaining hydrocarbon;
• and
• selectively supplying hydrogen, hydrocarbon, or a blend of hydrocarbon and hydrogen to the at least one combustion chamber depending on the mode of operation of the gas turbine.

A fuel supply system for at least one combustion chamber of a gas turbine, the fuel supply system comprising:

• a fuel supply line for supplying the at least one combustion chamber with a blend of hydrocarbon and hydrogen comprising:
• an intake section intended to be connected to an industrial, transmission, or distribution gas network providing a blend of hydrocarbon and hydrogen;
• a separation section adjacent to the intake section and connected to an inlet of the blend of hydrocarbon and hydrogen in a bypass circuit having at least one separation device for separating the blend of hydrocarbon and hydrogen;
• an injection section adjacent to the separation section connected to an outlet of hydrocarbon and to an outlet of hydrogen in the bypass circuit;
• a feed section adjacent to the injection section and connected to the at least one combustion chamber of the gas turbine;
• and
• a plurality of valves each positioned respectively between the intake section and the separation section, between the separation section and the injection section, between the injection section and the feed section, between the separation section of the fuel supply line and the inlet of blend of hydrocarbon with hydrogen in the bypass circuit, between the hydrocarbon outlet of the bypass circuit and the injection section of the fuel supply line, and between the hydrogen outlet of the bypass circuit and the injection section of the fuel supply line.