Co-firing used engine lubrication oil with LPG in furnaces

S. A.B. Al-Omari, A. Shaheen, A. Al Fakhr, A. Al-Hosani, M. Al Yahyai

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Combustion and heat transfer characteristics obtained based co-firing LPG with used engine oils (UEO) in a furnace, are investigated experimentally. In an attempt to assess UEO as a fuel, the UEO-based results are compared with results obtained using two other fuels, namely diesel, and a used cooking oil (UCkO). To ease its admission to the furnace and its subsequent vaporization and combustion, UEO is preheated by allowing it to flow upwardly in a vertical pipe surrounded by hot gases generated from LPG combustion. UEO that reaches the tip of the pipe un-vaporized, spills and hence has the chance to further heatup and vaporize as it exchanges heat with the upwardly flowing LPG combustion gases, in a counter flow process. Runs are divided into three groups based on the mass ratio of the liquid-fuel/LPG and the mass flow rate of the LPG supplied to the furnace. Ranges of these quantities over which UEO qualify as a good fuel and/or good promoter to radiation have been identified.

Original languageEnglish
Pages (from-to)1259-1263
Number of pages5
JournalEnergy Conversion and Management
Issue number6
Publication statusPublished - Jun 2010


  • Combustion
  • LPG
  • Radiation
  • Used engine lube oil

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology


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