The possibility of using waste trap grease in electric power generation is explored in this study. The performance
and emissions of both diesel and waste trap grease oils were tested in a gas turbine generator at
comparable operating conditions. The fuel system of the gas turbine was modified for dual fuel capability
with a diversion valve and a heat exchanger with exhaust for elevating the temperature of trap grease.
The viscosity of trap grease was measured as a function of temperature and it was determined that
the trap grease oil should be heated up to nearly 80 C in order to approach the viscosity of diesel fuel
such that satisfactory injector atomization can be achieved. The heating values of the diesel and trap
grease were measured using an oxygen bomb calorimeter to facilitate the calculations of engine performance
on an energy input basis. The results showed that the trap grease exhibits less NOx emission for
high generator loads compared to diesel, whereas CO and CO2 emissions are slightly to significantly
higher than those of diesel as load decreases. The results of the performance and emissions testing indicate
that trap grease can be satisfactorily used for power generation.