Catalytic Pyrolysis of Waste Bicycle Tires and Engine Oil to Produce Limonene

Junzhi Wang, Xinjiang Dong, Zongliang Zuo and Siyi Luo ()
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Junzhi Wang: College of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266000, China
Xinjiang Dong: College of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266000, China
Zongliang Zuo: College of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266000, China
Siyi Luo: College of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266000, China

Energies, 2023, vol. 16, issue 11, 1-12

Abstract: NaOH, dolomite and NiCl 2 were used as catalysts to examine their effects on co–pyrolysis with waste bicycle tires (WT) and waste engine oil (WEO). The pyrolysis behaviors with catalysts were investigated by thermogravimetric analysis. The activation energy of the catalytic main reaction stage was derived by the Kissinger–Akahira–Sunose (KAS) method under four different heating rates conditions. The calculations show that all three catalysts can reduce the activation energy of the reaction. Co–pyrolysis of WT and WEO with different catalysts was performed in a self–made lab bench at 600 °C to explore the impact on the distribution of three–phase products. The properties of gas and oil products were characterized by FTIR and Py–GC/MS (Agilent 7890B, Santa Clara, CA, USA). With the mixing of catalysts, activation energy (E α ) decreased by 15–30% in the main reaction process. NaOH and dolomite increased the yield of gas by 7% and 10%. NaOH can significantly improve the yield of CH 4 . The proportion of limonene in pyrolysis oil increased to 19.65% with 10% NaOH. This article provides a new method for efficiently producing limonene by mixing WT and WEO with NaOH.

Keywords: waste tires; waste engine oil; CH 4; limonene; co–pyrolysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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