Experimental investigation on particulate emissions of a direct injection diesel engine fueled with diesel-diethyl adipate blends

Ruijun Zhu, Chun Shun Cheung, Zuohua Huang, Xibin Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

20 Citations (Scopus)


Euro V diesel fuel blended with 8.1%, 16.4%, 25% and 33.8% by volume of diethyl adipate (DEA), corresponding to 3%, 6%, 9% and 12% by mass of oxygen in the blended fuels, were tested on a 4-cylinder direct-injection diesel engine. Experiments were conducted under five engine loads at a steady speed of 1800. rev/min to investigate the effects of the blended fuels on combustion and particulate emission characteristics. The results indicate an increase in ignition delay and the amount of heat release in the premixed burning phase, while a decrease in both diffusive and total combustion duration with an increase in DEA in the fuel. Compared to the diesel fuel, the particulate mass concentration and the total number of particles are reduced significantly, whereas the proportion of soluble organic fraction (SOF) in the particles increases with increasing DEA in the fuel. The increase in SOF might increase the toxicity of the particles. Moreover, the geometric mean diameter (GMD) of the particles shifts towards smaller size. A diesel oxidation catalyst was used and found to further reduce both particulate mass and total number concentration. The results also show that the DOC could reduce the finer particles more effectively.
Original languageEnglish
Pages (from-to)264-276
Number of pages13
JournalJournal of Aerosol Science
Issue number4
Publication statusPublished - 1 Apr 2011


  • Combustion
  • Diethyl adipate (DEA)
  • Euro V diesel fuel
  • Particulate mass concentration
  • Particulate number concentration
  • Soluble organic fraction (SOF)

ASJC Scopus subject areas

  • Environmental Chemistry
  • Materials Science(all)
  • Pollution

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