Performance enhancement and emission reduction by using pine oil blends in a diesel engine influenced by 1, 4-dioxane

The study to improve the characteristics in terms of performance, emission and combustion aspects without any modification to a direct injection compression ignition engine using pine oil blend and additive addition was executed. Biofuels known for their reduction in emission also degrades the engine’s performance value. To overcome this, pine oil mixture was used with an additive (1,4-dioxane). Pine oil taken at two different concentrations (P20, P40) and the additive at two varying proportions (5 ml, 10 ml) were utilized. In total, six pine oil mixtures were prepared and analyzed for the emission, performance and combustion aspects of the test engine and compared with diesel values. The result evidenced the rise of 3.88% and 5.57% for brake thermal efficiency and fuel consumption, respectively, for P20-10 ml blend compared with diesel. Contemplating the emission aspects, considerable decrease in pollutants (22.41% CO, 29.19% HC and 22.80% smoke) excluding NOx and CO2 at peak load conditions was depicted. NOx and CO2 increase about 7.23% and 25.41%, respectively. Combustion parameters like heat release rate and peak pressure of pine oil mixture exhibited inferior values compared with diesel. Only P20 blend with 10 ml additive exhibited values very close (a drop of 2.8% HRR and 2.4% CP) to that of diesel value. To conclude, out of half-dozen blends when compared with diesel, P20 with 10 ml additive proves as the best blend, providing much capable outcomes.