Performance and emission characteristics of a diesel engine using Calophyllum Inophyllum biodiesel blends with TiO2 nanoadditives and EGR

Abstract

An experimental investigation was carried out to evaluate the performance and emission characteristics of a single cylinder diesel engine by using Calophyllum Inophyllum biodiesel blends with TiO 2 nano additives and exhaust gas recirculation (EGR). The Calophyllum Inophyllum biodiesel-diesel blend was prepared by mixing 20% of Calophyllum Inophyllum biodiesel with 80% diesel (B20) in volumetric approach. The TiO 2 nanoparticles were dispersed into a B20 fuel with a dosage of 40 ppm to prepare the B2040TiO 2 fuel sample. The tests were conducted on a diesel engine by using B20, B2040TiO 2 , B20 + 20%EGR, B2040TiO 2 + 20% EGR fuel samples at different load conditions. The brake thermal efficiency of B2040TiO 2 , B2040 TiO 2 + 20%EGR fuels increased by 3.1%, 2.5%, and decreased by 1.8% for B20 + 20%EGR fuel compared to the B20 fuel at full load condition. The CO and HC emissions were reduced with the addition of TiO 2 nano particles to the B20 fuel and increased with the EGR method compared to the B20 fuel. The smoke emissions were increased by 16.23% and 12% for the B20 + 20%EGR and B2040TiO 2 + 20%EGR fuel samples compared to the B20 fuel at full load condition. The NOx emissions were reduced with the EGR technique and increased with the addition of TiO 2 nanoparticles to the biodiesel blend compared to the B20 fuel. It is concluded that Calophyllum Inophyllum biodiesel blend (B20) with the addition of TiO 2 nano particles and EGR technique exhibits better engine performance and reduced emissions compared to the other fuels.