Evaluation of PM Emissions of a Diesel Engine Fueled with Waste Cooking Oil Biodiesel: A Systematic Review

  • Omobolanle H. Oshinusi The George Washington University
  • George M. Gray The George Washington University
Keywords: Waste cooking oil, Biodiesel, Particulate matter, Sustainability

Abstract

The Navigation Guide developed by Johnson et al was used to conduct a robust
systematic review of six experimental intervention studies comparing particulate matter (PM)
emissions from heavy-duty diesel engines using waste cooking oil biodiesel versus conventional
petroleum diesel fuel. Waste cooking oil biodiesel is thought to be a more sustainably sourced
alternative to its fossil fuel counterpart and can aid in reducing cooking oil waste streams. The
Navigation Guide systematic review methodology tool was applied to analyse the hypothesized
question: Does the replacement of petroleum diesel with waste cooking oil biodiesel reduce
hazardous PM emissions in heavy duty vehicles? The study question was specified, evidence was
selected and the quality and strength of the overall evidence was assessed for both individual studies
and across the body of studies. Precise criteria and protocols were developed and followed
throughout the review process to ensure that a thorough evaluation of all data was completed. All six
studies that met the review inclusion criteria utilized six-cylinder direct injection engines. Although
the PM emissions were measured differently across the exposure continuum, there was an overall
PM emission reduction of 28% across the studies when petroleum diesel was substituted with waste
cooking oil biodiesel. The overall risk of bias across the studies was determined to be „low‟. Based
on the application of the Navigation guide methodology, it was found that the strength of the
evidence provided was „sufficient‟ to suggest an association between waste cooking oil biodiesel and
PM emission reductions

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Published
2019-10-23
How to Cite
Oshinusi, O., & Gray, G. (2019). Evaluation of PM Emissions of a Diesel Engine Fueled with Waste Cooking Oil Biodiesel: A Systematic Review. Proceedings of the World Conference on Waste Management, 1(2), 01-14. https://doi.org/10.17501/26510251.2019.1201