Abstract
The rapid development of the automotive industry has led to the accumulation of a large number of waste tires that contain a lot of reusable energy. Macromolecular organics in waste tires can be crack small molecule organics via pyrolysis. In this experiment, thermogravimetry (TG) and pyrolizer-gas chromatography/mass spectrometry (PY-GC/MS) were used to study the pyrolysis behavior of waste tires with different particle sizes, and the effect of temperature and particle size on the pyrolysis products of waste tires under low-temperature pyrolysis conditions, respectively. The volatile substances in waste tires decomposed intensively at 300-500�C and were completely pyrolyzed at 500�C. The content of limonene in the pyrolysis product was significant, and the yield of limonene could reach 27.73% when the waste tire particles were 0.180-0.250 mm and the pyrolysis temperature was 380�C. The mechanism of limonene formation from waste tires was discussed. This study indicated that raw material particle sizes and pyrolysis temperature could change the components and content of pyrolysis products.
Highlights
The improvement of life standard among others has promoted automobile production and increased the number of waste tires
The waste tire particle sizes, which ranged at >0.850mm, 0.425-0.850mm, 0.250-0.425mm, 0.180-0.250 mm, 0.150-0.180mm and
The results show that the reduction of carbon content will decrease the weight loss rate and the decomposition rate of tires
Summary
The improvement of life standard among others has promoted automobile production and increased the number of waste tires. The methods of waste tire treatment contain tire retreading, combustion, landfilling and pyrolysis, etc [1]. Pyrolysis could maximize the conversion of waste tires into high-value products is a research subject that researchers focused densely on [8]. Pyrolysis refers to the chemical process of converting rubber into carbon black, high-value fuel oil and fuel gas in the absence of oxygen or the presence of inert gas. This is a high potential, attractively and environmentally friendly method to treat solid waste, which conforms with the principles of reduction, decontamination, treatment and recycling of waste tires [9]
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