Preparation, characterization, and uses of tire-derived particles
An innovative technique called the WOMBAT (Wertz Oxidative Molecular Bombardment at Ambient Temperature) was developed to convert scrap tires into tire-derived particles (TDP). These TDP have a higher heat value and burn cleaner than a typical bituminous coal. Wavelength-dispersive x-ray fluorescence spectrometry (XRF) was used to trace the fate of the inorganics (zinc, calcium, sulfur, titanium, and iron) impregnated into the styrene-butadiene copolymer of the tire. Infrared spectroscopy, nuclear magnetic resonance, and gas chromatography are among the other techniques used to characterize the TDP as well as gas emitted during the WOMBAT process. Combustion studies were also performed to test the fuel capabilities of the TDP.