Combustion Research Journal (CRJ)

Research Article

Combustion experimental study of used motor oil and Diesel oil in circulating fluidized bed

Mahmoud A. M. Youssef^1,2, Hamada M. Abdelmotalib², and Ahmed Ghazy¹

¹Department of Mechanical Engineering, Jouf University, Kingdom of Saudi Arabia.

²Mechanical Power Engineering Department, Minia University, Egypt.

Submitted: September 9, 2019; Revised: September 29, 2019 ;Accepted: October 5, 2019.

Abstract

Millions of tons of used automotive motor oil are disposed every year causing a severe pollution to the environment. However, the combustion of used motor oil could be a remedy to this problem. This paper investigates the combustion of used motor oil and Diesel oil in a circulating fluidized bed (CFB) combustor. Moreover, the influence of excess air ratio on temperatures and heat flux along the combustion chamber height and the concentrations of CO, NO_x, SO₂ and unburned hydrocarbons in the flue gas was studied. Furthermore, a comparison between the CFB combustion of used motor oil and that of Diesel oil was carried out. The results showed that used motor oil can be directly and efficiently burned in CFB without any treatment or purification processes. The combustion efficiency of used motor oil in CFB was about 98% for an excess air ratio of 10%. In addition, the study proved that used motor oil can be utilized as an alternative fuel in CFB combustion systems especially there was a good agreement between the combustion behaviors of used motor oil and Diesel oil in terms of temperature, heat flux and gas emissions.

Keywords

Circulating Fluidized Bed (CFB); used motor oil; diesel oil; emissions; combustion efficiency; TGA; DTA.

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