Assessment of the emission characteristics of the diesel engine with nano-particle in neem biodiesel

Abstract

ABSTRACT This study focuses on the effect of particle size of cerium oxide (CeO2) nanoparticle on the emissions characteristics of four-stroke, single cylinder water-cooled diesel engine fueled with neat neem biodiesel (NBD100). Neem oil is transesterified into biodiesel and employed in this work. Cerium oxide as an additive in various particle-size of 10 nm and 20nm is included to NBD100 and termed as NBDCeO210 and NBDCeO220. The experimental result proved that all the chemical and physical properties of fuels are in sequence with ASTM standards. The CO and HC emissions are 4.3% and 4.7% lower for NBD100 than diesel at 3.5 bar BMEP. CeO2 nanoparticle further reduces CO and HC emissions 4.2% and 3.6% correspondingly for NBDCeO220 than NBD100. The degree of NOX emission in NBD100 is 5.6% higher at 3.5 bar BMEP. When compared to NBD100, tailpipe NOx emission was found to be 2.7% and 3.6% lower when fueled with NBDCeO210 and NBDCeO220. In addition, the tailpipe smoke emission was found to be 1.7% lower when fueled with NBD100.