Emissions characteristics of a diesel engine operating on biodiesel and biodiesel blended with ethanol and methanol

Lei Zhu, Chun Shun Cheung, W. G. Zhang, Zhen Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

219 Citations (Scopus)


Euro V diesel fuel, pure biodiesel and biodiesel blended with 5%, 10% and 15% of ethanol or methanol were tested on a 4-cylinder naturally-aspirated direct-injection diesel engine. Experiments were conducted under five engine loads at a steady speed of 1800 r/min. The study aims to investigate the effects of the blended fuels on reducing NOxand particulate. On the whole, compared with Euro V diesel fuel, the blended fuels could lead to reduction of both NOxand PM of a diesel engine, with the biodiesel-methanol blends being more effective than the biodiesel-ethanol blends. The effectiveness of NOxand particulate reductions is more effective with increase of alcohol in the blends. With high percentage of alcohol in the blends, the HC, CO emissions could increase and the brake thermal efficiency might be slightly reduced but the use of 5% blends could reduce the HC and CO emissions as well. With the diesel oxidation catalyst (DOC), the HC, CO and particulate emissions can be further reduced.
Original languageEnglish
Pages (from-to)914-921
Number of pages8
JournalScience of the Total Environment
Issue number4
Publication statusPublished - 15 Jan 2010


  • Biodiesel
  • Emission
  • Ethanol
  • Euro V diesel fuel
  • Methanol

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

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