PYROLYSIS OF A FRACTION OF MIXED PLASTIC WASTES DEPLETED IN PVC

A fraction of plastic wastes from DSD (Duales System Deutschland) whic h is depleted in polyvinylchloride (PVC) was pyrolyzed at 638, 690 and 735 degrees C in a technical-scale fluidized bed reactor. At 638 degr ees C over 50 wt.% of the pyrolysis product was an oil with a boiling point less than 295 degrees C; this can be used as feedstock in a stea m cracker. The experiment at 690 degrees C yielded about 40 wt.% of an oil, about the half of which consists of benzene, toluene and xylene (BTX-aromatics). At the highest reaction temperature of 735 degrees C, the main product was a highly aromatized oil; the BTX-aromatics conte nt is about 20 wt.% of the pyrolysis product. (C) 1997 Elsevier Scienc e B.V.