The use of alternative fuels, such as bioalcohols, creates real opportunities for cleaner and more environmentally friendly operation of gas turbines in the aviation and energy sectors. At the same time, the development of gas turbine technologies with flexible fuel supply systems enables the use of alternative non-fossil fuels that can play a key role in global efforts to meet emission targets. Operation and emission characteristics of the GTM-140 jet engine fueled with mixtures of pentanol and aviation kerosene were developed and the results were compared with mixtures of kerosene with other biofuels - propanol (C₃ alcohol) and butanol (C₄ alcohol). All tested alternatives to liquid biofuels showed the potential to reduce regulated emissions such as NO_X (on average by 40%) and CO (on average by 25%) for C₅ alcohol. Increasing the proportion of pentanol in the mixtures results in lowering the temperature behind the combustion chamber. Engine fuel efficiency expressed as specific fuel consumption (TSFC) for all tested biofuels decreased by an average of 40% for C₅ alcohol.

Thrust-specific fuel consumption, NO_x and CO emission indexes as a function of rotor rotational speed do the considered blends of alcohols C₃-C₅ and kerosene.