PRODUCTION OF COKE FROM SCRAP TIRE VACUUM PYROLYSIS OIL

The heavy fraction (b.p. > 350 degrees C) of the oil obtained during v acuum pyrolysis of used tires is mainly composed of aromatic hydrocarb ons. The possibility to use this fraction as a raw material in the cok e industry was investigated. The coking experiments were carried out i n a laboratory scale reactor at a temperature of 480-500 degrees C und er the partial pressure formed by the vapors and gas produced. The hea ting temperature rate was 10 degrees C/min. It was found that one ton of tires can generate 28 kg of coke. The coke obtained is low in sulfu r and ash and has a low metal content. The main contaminant of petrole um coke, vanadium, is not present in the pyrolytic coke. These charact eristics rank the tire-derived coke obtained among the best needle cok e or graphite coke base-materials. A characterization of the gas and l iquid by-product fractions as well as the coke obtained was performed. High quality products were obtained.