Regulated and unregulated emissions from a diesel engine fueled with biodiesel and biodiesel blended with methanol

Chun Shun Cheung, Lei Zhu, Zhen Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

173 Citations (Scopus)


Experiments were carried out on a diesel engine operating on Euro V diesel fuel, pure biodiesel and biodiesel blended with methanol. The blended fuels contain 5%, 10% and 15% by volume of methanol. Experiments were conducted under five engine loads at a steady speed of 1800 rev min-1to assess the performance and the emissions of the engine associated with the application of the different fuels. The results indicate an increase of brake specific fuel consumption and brake thermal efficiency when the diesel engine was operated with biodiesel and the blended fuels, compared with the diesel fuel. The blended fuels could lead to higher CO and HC emissions than biodiesel, higher CO emission but lower HC emission than the diesel fuel. There are simultaneous reductions of NOxand PM to a level below those of the diesel fuel. Regarding the unregulated emissions, compared with the diesel fuel, the blended fuels generate higher formaldehyde, acetaldehyde and unburned methanol emissions, lower 1,3-butadiene and benzene emissions, while the toluene and xylene emissions not significantly different.
Original languageEnglish
Pages (from-to)4865-4872
Number of pages8
JournalAtmospheric Environment
Issue number32
Publication statusPublished - 1 Oct 2009


  • Biodiesel
  • Diesel engine
  • Methanol
  • Regulated emissions
  • Unregulated emissions

ASJC Scopus subject areas

  • Environmental Science(all)
  • Atmospheric Science

Cite this