Waste tires based pyrolysis for synthetic fuel and studying its properties
摘要
This article presents the results of a study on the recycling process of worn-out automobile tires using pyrolysis in a nitrogen-free environment under atmospheric pressure. The raw material consisted of tires collected from a local vulcanization center. Pyrolysis was carried out in an experimental pyrolysis unit, which included a pyrolysis reactor, a gas and liquid collector, and a cooling system. A total of 4.18 kg of tire pieces were used for the experiment. The process was conducted at a temperature of 500 °C and atmospheric pressure for 1 hour. As a result, 1800 ml of pyrolysis oil, 1320 g of carbon black, 600 g of metallic cord, and 630 g of pyrolysis gas were obtained. The physical properties of the pyrolysis oil were analyzed: The density was found to be 0.906 kg/m3, the kinematic viscosity was 0.75 mm2/s, and the chloride salt content was 104.4 mg/dm3. The composition of the oil was analyzed using infrared spectroscopy, gas chromatography, and mass spectrometry, revealing the presence of 45.3% aromatic compounds and 19.23% alkenes and alkynes. Elemental analysis showed nitrogen (2.57%) and sulfur (1.27%) content in the pyrolysis oil. A light fraction was obtained from the pyrolysis oil using a distillation unit. From 150 ml of pyrolysis oil, 60 ml of the light fraction was extracted.