An experimental investigations on combined effect of EGR and SCR for diesel engine fuelled with the addition of TiO2 nanoparticle to M.Elangi methyl ester blend

Abstract

ABSTRACT The performance and emission magnitude have been investigated on the single cylinder CI engine fuelled with M.Elangi methyl ester (MEME) blends with TiO2 nano additives with exhaust gas recirculation (EGR) and Selective Catalytic Reduction (SCR) system. To improve the performance and minimize the emission magnitude, the TiO2 nanoparticles were dispersed into a MEME 20 fuel with a dosage of 25 ppm to prepare the MEME20+25 TiO2 fuel sample. Further, minimization of NOx and other emissions the EGR and SCR technique are provided to test the engine with MEME20, MEME20+25TiO2, MEME20+25TiO2@ 20%EGR with different of urea solution at constant flow rates, which is varied from30 to 35 % by weight. The brake thermal efficiency of MEME20+25TiO2, MEME20+25TiO2@ 20%EGR fuels increased by 3.6%, 2.8%, compared to the MEME20 fuel at full load condition. The emissions of HC and CO were reduced with the addition of TiO2 nanoparticles to the MEME20 fuel and both the emissions were increased with EGR method compared to that of MEME20 fuel. The smoke emissions were increased by 12.23% for MEME20+25TiO2@ 20%EGR and decreased by 57.33% for the MEME20+25TiO2@ 20%EGR with 35% urea injected compared to that of MEME20 fuel at maximum load condition. The NOx emissions were reduced by 17.11% and 60% for MEME20+25TiO2 and MEME20+25TiO2@ 20%EGR with 35% urea injected and connected with Titanium dioxide (TiO2) coated catalyst compared to the MEME20. It is concluded that MEME20+25TiO2@ 20%EGR with35% urea injected with Titanium dioxide (TiO2) coated catalyst (SCR) technique exhibits better engine performance and greater reduction of exhaust emissions.