Computational modelling of NOx emissions from biodiesel combustion

Wenqiao Yuan, Alan C. Hansen, Qin Zhang

Research output: Contribution to journalArticlepeer-review


A detailed numerical spray atomisation, ignition, combustion and NO x formation model was developed for direct injection diesel engines using KIVA-3V code that could be applied to biodiesel fuels and this model was used to investigate the NOx emissions mechanisms of biodiesel compared with diesel fuel. In addition, computational modelling was applied to evaluate strategies for reducing NOx emissions from biodiesel combustion. The physical and thermodynamic properties of biodiesel used in the model were based on fatty acid composition. The model was verified with experimental data from an engine fuelled with diesel fuel, soyabean methyl ester, Yellow Grease Methyl Ester (YGME) and genetically modified soyabean methyl ester. Strategies for reducing NOx emissions from biodiesel combustion were evaluated with the aid of the model. Increasing spray cone angle, retarding start of injection, applying Exhaust Gas Recirculation (EGR) and charge air cooling were all effective approaches to reducing NOx emissions from biodiesel fuel.

Original languageEnglish (US)
Pages (from-to)12-32
Number of pages21
JournalInternational Journal of Vehicle Design
Issue number1-2
StatePublished - 2007


  • Biodiesel
  • Combustion
  • EGR
  • Exhaust gas recirculation
  • Ignition
  • Modelling
  • Spray

ASJC Scopus subject areas

  • Automotive Engineering
  • Mechanical Engineering


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