Effect of Blending Nano additive with Cashew Nut Shell Liquid Bio-oil on Performance, Combustion and Emission Characteristics of Four Stroke Diesel Engine ? An Experimental Study

The purpose of this study is (i) to investigate the impact of cerium oxide nanoparticles added at 20, 40 and 60 ppm levels to 20% cashew nut shell liquid (CNSL) bio-oil blended with No.2 diesel fuel, in terms of the performance and exhaust emissions on a 4-cylinder naturally-aspirated direct-injection diesel engine, and (ii) to determine the best cerium oxide- bio-oil combination that offers enhanced engine performance and pollutant reduction. Experiments were conducted under five engine loads at a steady speed of 1500 rpm. The influence of blends on carbon monoxide (CO), nitrogen oxide (NO), hydrocarbon emission and smoke opacity were investigated. The experimental results revealed a substantial enhancement in the performance of engine and reduction in harmful emissions for cerium oxide nanoparticle blends compared to those of bio-oil blend and diesel. The 20 % biodiesel with 40 ppm cerium oxide nanoparticle additive reduces the NO emission by 27% when compared to 20% bio-oil blends, CO emission is reduced by 37% and smoke opacity reduced by 29% at full load compared to No.2 diesel.