Naphtha and process gas/syngas mixture firing method for gas turbine engines

A fuel delivery system (60) for a gas turbine designed to efficiently transfer from one type of fuel to a separate fuel, comprising different and cooperating fuel modules, namely high hydrogen fuel gas (61), distillate fuel and naphtha fuel modules, each of which feeds a different liquid (82,83) or gas fuel (71) to the combustors (73), an atomized air delivery system (88) for either the naphtha (83) or distillate (82) (or combinations thereof), an air extraction system (80), a plurality of distribution control valves for the high hydrogen fuel gas, distillate fuel and naphtha fuel modules, and a nitrogen purge system (93) to purge the high hydrogen fuel gas (71) lines to the combustors (73) and/or flushing the naphtha lines (83) with distillate (82).