Improvement in the performance and emission characteristics of diesel engine fueled with jatropha methyl ester and tyre pyrolysis oil by addition of nano additives

Abstract

Experimental study has been carried out to investigate performance parameter and emission characteristics of 4-stroke single cylinder direct injection (DI) diesel engine fueled with jatropha methyl ester (JME) and tyre pyrolysis oil (TPO). The carbon nanotubes (CNT) and cerium oxide (CeO2) were used as nano additives in the various blends. 100 ppm of CNT and CeO2 was mixed in various concentrations of JME and TPO blends (JME90TPO10, JME80TPO20, and JME70TPO30) to analyze the effect of nanoparticles on the engine performance and emission characteristics. Experimental results have indicated the perceptible enhancement of performance parameters along with appreciable decrement in harmful emission of CO, HC and NOx using CNT and CeO2. At full load condition, JME80TPO20, JME80TPO20CeO2100, and JME80TPO20CNT100 gave the optimum results compared to other grades of blended fuels. The CO emission has gone down appreciably by about 43.11, 60.19 and 8.26 %, respectively, for JME80TPO20CeO2100, JME80TPO20CNT100 and JME80TPO20 as compared to diesel fuel. It has been also observed that the addition of nanoparticles (CeO2 and CNT) to the JMETPO blends leads to decrease in the BSEC of JMETPOCeO2/CNT blended fuel. Moreover, with the addition of nanoparticles an increase in the thermal efficiency of the JME80TPO20CeO2100 and JME80TPO20CNT100 blends was observed; the thermal efficiency of these blends at full load condition was around 24.25 and 25.64 %, respectively, which is quite higher than JME80TPO20 blend. Also the JMETPOCNT and JMETPOCeO2 blended fuels produce lower NOx emission as compared to JMETPO blended fuels. The hydrocarbon emission and smoke density were also found to be lower with the addition of nanoparticles in the JMETPO blends.