Flame spectroscopy of waste tire oils and waste cooking oils blends using coaxial burner

• Published in: Journal of the Energy Institute 2020-06, Vol.93 (3), p.977-990
• Main Authors: Emara, Karim, Mahfouz, Ahmed, Moneib, H.A., El-Fatih, Ahmed, Emara, Ahmed
• Format: Article
• Language: English
• Subjects: Emission radical intensity; Flame emission spectroscopy; Thermal microstructure; Waste cooking oil; Waste tires pyrolysis oil
• ISSN: 1743-9671
• DOI: 10.1016/j.joei.2019.08.008

Waste tires and cooking oil pose a serious danger to human health and environment. Self-reacting pyrolysis system for waste tires is designed and constructed for converting waste tires into oil that could be used as a sustainable fuel. This study aims to analyze the thermal microstructure of conventional fuels like light diesel oil (LDO) and heavy diesel oil (HDO) as well as blended with waste cooking oil (WCO) and tires pyrolysis oil (TPO) using a co-axial burner via flame spectroscopy analysis. The first Blend 1 (B1) consists of 20% WCO + 80% LDO, the second one (B2) consist of 20% WCO+80%HDO and the last one (B3) was 20%TPO and 80% LDO by mass. This percentage was chosen carefully and according to previous combustion characteristics results. The experimental results showed that B1 will shrink C2 radicals by nearly 61% and 64.5% at Ф = 0.63 and 0.96 respectively. B2 will decrease C2 radicals by nearly 19% and 82% at Ф = 0.63 and 0.96 respectively. Finally, B3 will reduce C2 radical's intensity by nearly 39% and 58% at Ф = 0.63 and 0.96 respectively. TPO produced CH emission radicals lower than that of LDO by nearly 5.9%. LDO droplets absorbed more radiation energy needed for excitation than that of WCO due to droplet size and fuel physic-chemical properties. B2 fuel is recommended to replace LDO at Ф = 0.63 and 0.96. •The research deals with waste tires and cooking oils and converting them to fuel energy.•Self-reacting pyrolysis system was designed and manufactured.•Flame spectroscopy analysis was carried out on conventional and alternative fuels.•Emission contour radicals were drawn at lean and near stoichiometric mixtures.