ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Waste tires based pyrolysis for synthetic fuel and studying its properties

Abdug’affor Mirzabdullaevich Khurmamatov and Kumush Shakhobiddin kizi Akhmedova

Almalyk Branch of Tashkent State Technical University named I.Karimov, Almalyk, Uzbekistan

E-mail: gafuri_19805@mail.ru

Received: 17 January 2025  Accepted: 26 March 2025

Abstract:

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.

Keywords: Asphalt, Bitumen; Crop waste; Mechanical Properties of Materials; Organic Molecules in Materials Science; Physical Properties of Materials; Tribology; Used tire; Pyrolysis; Pyrolysis oil; Carbon black; Metal cord; IR spectra; Gas chromatography and mass s

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-025-04041-4

Chemical Papers 79 (6) 3883–3893 (2025)