Reduction of Greenhouse Gases from a Coated Diesel Engine Fuelled with Honge Biodiesel for Sustainable Environment

In this research work, the impact of thermal barrier coating on combustion and gas emissions in a diesel engine fuelled with honge biodiesel fuel is examined. The engine combustion chamber components including inlet and exhaust valves, cylinder head, and piston crown were coated with YSZ ceramic material over nickel aluminium alloy bond coat for 250 µm thickness. Test results exhibited that in the coated engine, fuel blend B15 emitted significant reduction in carbon monoxide gas, unburnt hydrocarbon gas, smoke emission with a slight increase of NO_x and CO₂ gaseous emission than other fuels tested. At lower loads, honge fuel blend B15 showed a drastic reduction in CO gas emission of 18.65%, HC emission of 17.24%, smoke gas reduction of 29% with a slight increase in NO_x emission of 5.38% and CO₂ gas of 6.80% in injection advance of 27° crank angle BTDC. At higher loads, fuel B15 experienced emission reduction in CO of 10%, HC of 10.4%, smoke of 9.85% and slight increase in NO_x gas of 2.94% and CO₂ gas of 4.60%. Diesel posed higher HRR of 46.25 J/deg and higher cylinder peak pressure of 71.456 bar followed by B15 blend of HRR 43.25 J/deg, peak cylinder pressure 67.33 bar in an injection advance. Engine exhaust gases are passed into a retrofit CO₂ capture kit developed to separate CO₂ gas from vehicle exhaust through chemical absorption technique. Amine-based chemical solvent has been employed to separate CO₂ gas.