Characteristiccs Of Performances And Emissions Of Biodiesel Blends Based On Euro-Iii Diesel Engine

Characteristics of emissions and performance of biodiesel blending based on Euro-III diesel engine was investigated in this study. Test and analysis of performance and emissions were carried out by employing AVL SESAM FTIR & SMPS (TSI Ltd.) under full load and part-load conditions.The result shows that fuel consumption of blended fuel is larger than that of petro-diesel while power performance decreases at the mean time. Fuel Consumption of pure biodiesel is increased by 2.1¹2.5% and the output power is decreased by 1.8%¹0.4%. Regarding regulated gas emissions, with the increase percent of biodiesel in the blends, NOx is increased while CO and soot are decreased. Furthermore, it is also found that NO is oxidized to be NO₂ by oxidization catalyst and this has potential benefit for DPF to reduce particles. Considering fuel consumption, power performance and emissions, B10 blends is recommended for the application on the diesel engine. As for unregulated gas emissions, greenhouse gas emitted is mainly of CO₂. Since emission of CO₂ by biodiesel blends in the eco-lifecycle is decreased, application of biodiesel blend can decrease emissions of greenhouse gases. Study of particle number distribution indicates that there are two areas of nucleation mode and accumulation mode respectively, the breakpoint of which is 50nm. Number of particles size of which is larger than 50nm by biodiesel blended is less than that of petro-diesel due to oxidization effect of fuels with oxygen. However, distribution of particle number of nucleation mode closely relates to sulfur content. Low sulfur of biodiesel facilitates inhibiting formation of nano particles.