Supercritical extraction of used automotive tire with water

Abstract

Samples from a used automotive tire were subjected to subcritical and supercritical extraction with water. Supercritical water was found to be almost as effective as supercritical n-pentane. For a 9-mm cube sample the rate of supercritical extraction with water followed a first-order kinetics with an activation energy of 170 kJ/mol. Dynamic TGA data for 0.13-0.35 mm samples showed that pyrolysis at temperatures of 690–730 K had almost the same activation energy as did supercritical extraction with water. © 1987, The Society of Chemical Engineers, Japan. All rights reserved.