Thermolysis of scrap tire using supercritical toluene

With toluene in the supercritical state, scrap tire was decomposed into low molecular weight hydrocarbon liquid and solid residual. The experiment was carried our at 523.15, 573.15 and 623.15 K and pressures of 5, 10, and 15 MPa. The liquid and solid residual products were further separated by a sim ple filtering method. The reaction time, tire weight: and the amount of the solvent were determined for the optimal thermolysis. The decomposition per cent and TGA were used to evaluate the decomposition characteristics in ter ms of temperature and pressure. The GC-MS was applied to the decomposed liq uid products from the various conditions. The average molecular weight of t he decomposed Liquid products tended to become lower with the increasing te mperature.