Role of Biodiesel-Diesel Blends in Alteration of Particulate Matter Emanated by Diesel Engine

Alteration of Particulate Matter by Biodiesel

  • Asad Naeem Shah Department of Mechanical Engineering, University of Engineering and Technology, Lahore-54000, Pakistan
  • Ge Yun- Shan bNational Laboratory of Auto Performance and Emission Test, School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing100081, China
  • Tan Jian- Wei National Laboratory of Auto Performance and Emission Test, School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing100081, China
  • Ejaz Mahmood Shahid Department of Mechanical Engineering, University of Engineering and Technology, Lahore-54000, Pakistan
Keywords: biodiesel, unregulated emissions, trace metals, nanoparticles, sulphates, diesel engine

Abstract

The current study is focused on the investigation of the role of biodiesel in the alteration of particulate matter (PM) composition emitted from a direct injection-compression ignition. Two important blends of biodiesel with commercial diesel known as B20 (20% biodiesel and 80% diesel by volume) and B50 were used for the comparative analysis of their pollutants with those of 100% or traditional diesel (D). The experiments were performed under the auspices of the Chinese 8-mode steady- state cycle on a test bench by coupling the engine with an AC electrical dynamometer. As per experimental results, over-50 nm aerosols were abated by 8.7-47% and 6-51% with B20 and B50, respectively, on account of lofty nitrogen dioxide to nitrogen oxides (NO2/NO´) ratios. In case of B50, sub-50 nm aerosols and sulphates were higher at maximum load modes of the test, owing to adsorption phenomenon of inorganic nuclei leading to heterogeneous nucleation. Moreover, trace metal emissions (TME) were substantially reduced reflecting the reduction rates of 42-57% and 64-80% with B20 and B50, respectively, relative to baseline measurements taken with diesel. In addition to this, individual elements such as Ca and Fe were greatly minimised, while Na was enhanced with biodiesel blended fuels. 

Published
2015-04-27