Experimental mitigation of NOxemission in exhaust gases of CI engine fuelled with methyl ester of cottonseed oil blend

This paper discusses the development of a B20 cottonseed oil blend for passenger vehicle with vanadium-based Selective Catalytic Reduction (SCR) technology addition on exhaust system. SCR is a progressive emissions governor technology organism that injects a liquid-Urea (also called aqueous urea, Ad Blue or Diesel Exhaust Fluid) through an injector nozzle into the exhaust manifold of diesel engine. The methyl ester of cottonseed oil blend was analysed in a single cylinder, 4-stroke, computerised water-cooled, diesel engine of 5.2 kW rated power for performance and emission characteristics with SCR. The results indicate that the emissions of the CI engine running on B20 blend with the catalytic convertor reduced NO(x)emission up to 76% with different quantity of dosing. However, it is noted that the brake thermal efficiency is reduced slightly by 2% for SCR due to the back pressure created by the SCR system.