EXPERIMENTAL STUDY FOR GASIFICATION OF SCRAP TIRES

A set of laboratory apparatus with feature of fast pyrolysis and capability of continuously measuring and recording of parameters was designed and constructed. Powder of ground automotive tire was pyrolysed with the apparatus in a N₂ atmosphere. The composition and properties of derived gases were determined in relation to pyrolysis temperature from 500−1000°C and different gas phase residence time. As pyrolysis temperature and gas phase residence time was increased, the mass percentage of solid char decreased, while gas productivity increased. The tires produced 41% oil, 24% gas and 35% char approximately and calorific value of the gases was about 36000kJ/Nm³ at 800°C. The gases were identified as H₂, CO, CO₂, CH₄, C₂H₄, C₂H₆ and C₃H₆ in addition to lower concentrations of H₂S and other hydrocarbon gases. Test results of tire pyrolysis are compared with data obtained by biomass gasification.