- With all optimized operating conditions, the engine was operated for 6 h long duration. On an average, for HOMEeproducer gas operation with optimized nozzle geometry and RCC resulted in 5.65% increased BTE, 19% decreased smoke, 11.2% decreased HC, 17.64% decreased CO, and 15.68% increased NOx levels, and lower ignition delay and combustion duration and slightly increased cylinder pressure and improved heat release rates were observed compared to HOMEeproducer gas operation with optimized nozzle geometry and HCC. It has also been observed that, HOME-producer gas combination resulted in smoother engine operation. Renewable and alternative fuels like biodiesel and producer gas derived from various bio-mass are suitable for dual fuel operation and their extensive use will pave way for the energy security of the country.