Determination of the Underlying Cause of the Biodiesel Nox-effect in Common Rail Diesel Engines

While biodiesel has been shown to reduce emissions of particulate matter, carbon monoxide and total hydrocarbons, there have been widespread reports of increases in NOx emissions. (Cheng et al. reported NOx emissions increases of 1% for each 10% of biodiesel content.) NOx increase arises from changes in mixture stoichiometry at the lift-off length (Cheng et al., Brezinsky et al.) NOx increases arises from changes in radiative heat transfer effects (Cheng et al.)  Physical and chemical property effects of biodiesel on the combustion and emissions formation processes in common rail diesel engines. (Test engine will be supplied by Ford Motor Co.) Start with existing compuational fluid dynamics (CFD) Model Run numerical experiments to predict NOx emissions for variations in fuel 1) viscosity, 2) density, and 3) latent heat of vaporization. Verify CFD model predictions through companion experiments in the Penn State Diesel Combustion and Emissions Laboratory.

  • Supplemental Notes:
    • Program Information: Advanced Research, Biobased Research


  • English


  • Status: Completed
  • Sponsor Organizations:

    Research and Innovative Technology Administration

    Department of Transportation
    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Johnson, Shawn

  • Performing Organizations:

    Pennsylvania State University, University Park

    University Park, PA  United States  16802-4710
  • Principal Investigators:

    Boehman, Andre

  • Start Date: 20080701
  • Expected Completion Date: 0
  • Actual Completion Date: 20100630
  • Source Data: RiP Project 25225

Subject/Index Terms

Filing Info

  • Accession Number: 01572258
  • Record Type: Research project
  • Source Agency: Northeast Sun Grant Institute
  • Files: RiP
  • Created Date: Aug 4 2015 1:01AM