ULTRAPYROLYSIS OF AUTOMOBILE SHREDDER RESIDUE

A fast pyrolysis (Ultrapyrolysis) process was employed to convert auto mobile shredder residue (ASR) into chemical products. Experiments were conducted at atmospheric pressure and temperatures between 700 and 85 0 degrees C with residence times between 0.3 and 1.4 seconds. Pyrolysi s products included 59 to 68 mass% solid residue, 13 to 23 mass% pyrol ysis gas (dry) and 4 to 12 mass% pyrolytic water from a feed containin g 39 mass% organic matter and 2 mass% moisture. No measurable amounts of liquid pyrolysis oil were produced. The five most abundant pyrolysi s gases, in vol%, were CO (18-29), CO2 (20-23), CH4 (17-22), C2H4 (20- 22) and C3H6 (1-11), accounting for more than 90% of the total volume. The use of a higher organic content ASR feed (58 mass %) resulted in less solid residue and more pyrolysis gas. However, no significant cha nges were noted in the composition of the pyrolysis gas.