Effect of Biodiesel B7 and B10 on Common Rail Diesel Engine Emission Characteristics at Different Engine Speeds

Abstract

In this study, biodiesel B7 and B10, which contain 7% and 10% biodiesel by volume, respectively, were used as high-speed diesel fuels to study the exhaust gas emissions of carbon monoxide (CO), carbon dioxide (CO2), nitrogen oxide (NOx), oxygen (O2), exhaust gas temperature (EGT), and fuel consumption (FC) with the common rail diesel engine at a ranging engine speed from 1200 to 3000 rpm without engine load. At the maximum engine speed of 3000 rpm, the CO, CO2, and NOx emissions of the biodiesel B10 were 23.79%, 1.94%, and 4.51% lower than the biodiesel B7. Concerning fuel consumption, biodiesel B10 consumed higher fuel than B7 at a maximum engine speed of 3000 rpm. The FC of the biodiesel B10 was 3.09 kg/h, which was 2.86% higher than that of the biodiesel B7 at the maximum engine speed. From the environmental impacts point of view, reducing air pollutants from exhaust gas emissions of the biodiesel B10 was better than B7 fuel. However, the fuel consumption of B10 was a little bit higher than B7.