Combustion characteristics and engine emissions of a diesel engine fueled with diesel and treated waste cooking oil blends

A. Abu-Jrai, Jehad A. Yamin, Ala'a H. Al-Muhtaseb, Muhanned A. Hararah

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

In this study, waste cooking oil from restaurants was used to produce a renewable and sustainable biodiesel through transesterification process. The Treated Waste Cooking Oil (TWCO) fuel produced has shown very promising chemical and physical properties; most notably; cetane number (∼49) and sulphur content (8mg/kg). The combustion of conventional diesel and Treated Waste Cooking Oil (TWCO)-diesel blend (50/50 by volume; shown as TD50) was examined at different engine conditions. The combustion of TD50 resulted in a considerable reduction in the smoke opacity and unburnt hydrocarbons associated with an increase in the CO2 and NOx emissions due to unintentional advance of fuel injection timing, caused by the higher bulk modulus of TD50 fuel. Results indicated an increase in brake specific fuel consumption with simultaneous reduction in the engine thermal efficiency compared to conventional diesel. The lower smoke opacity in the case of TD50 fuel assists NOx reductions by exploiting the higher EGR tolerance of TD50 fuel. Thus, a more encouraging NOx-smoke tradeoff may be selected to reduce both NOx and smoke. The effect of EGR in NOx reduction was more noticeable with TD50 than conventional diesel fuel.

Original languageEnglish
Pages (from-to)129-136
Number of pages8
JournalChemical Engineering Journal
Volume172
Issue number1
DOIs
Publication statusPublished - Aug 1 2011

Fingerprint

Cooking
diesel engine
Smoke
smoke
diesel
Diesel engines
engine
Oils
combustion
Engines
oil
Opacity
Antiknock rating
Biofuels
bulk modulus
Transesterification
Fuel injection
fuel consumption
Fuel oils
Diesel fuels

Keywords

  • Biodiesel
  • CO
  • EGR
  • HC
  • NO
  • Waste cooking oil

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering
  • Environmental Chemistry

Cite this

Combustion characteristics and engine emissions of a diesel engine fueled with diesel and treated waste cooking oil blends. / Abu-Jrai, A.; Yamin, Jehad A.; Al-Muhtaseb, Ala'a H.; Hararah, Muhanned A.

In: Chemical Engineering Journal, Vol. 172, No. 1, 01.08.2011, p. 129-136.

Research output: Contribution to journalArticle

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