The Performance and Emissions Investigations of Compression Ignition (CI) Engine Using Algal Biomass as an Antioxidant Additive in Coconut and Karanja Methyl Esters

The day-to-day human needs are strongly associated with the transportation and industrial sectors, which are influencing to deplete fossil fuel reserves. At this situation, the use of biodiesel in an efficient way is the only practical alternative to run compression ignition engines. The biodiesels fuel-borne oxygen may reduce carbon monoxide (CO), unburnt hydrocarbons (HC), and smoke emissions but increase carbon dioxide (CO2) and oxides of nitrogen (NOx) emissions. The scientists and researchers are starving to improve engine performance by reducing the most harmful NOx emissions. Because of this, the author has investigated naturally aspirated single-cylinder unmodified direct injection compression ignition (DICI) engine. Two grams of mixed culture algal biomass particles are added in highly saturated coconut and unsaturated Karanja biodiesel fuels. The brake thermal efficiency of algal particles-emulsified fuels increased due to the explosion of biodiesel-surrounded algal particles after attaining autoignition temperature. The reduction in NOx emissions is noticed with algal particles-emulsified fuels because the particles absorb heat from the combustion chamber.