Abstract
Reusable and recyclable automobile parts and materials are recovered from waste, then the remaining scraps are shredded into automobile shredder residue (ASR). The ASR is either buried or incinerated. However, the components of ASR consist of metals, glass, rubber, and unrecoverable PVC wire coatings, ABS and other plastics. If ASR is incinerated with these components, it will generate hydrogen chloride, which will corrode the incinerator. To study a solution to this problem, we studied dehalogenation behavior by applying dechlorination procedures for flexible PVC. ASR was placed in 2 to 16mol/L NaOH aqueous solution, heated by microwave at 100 to 190°C for 0 to 60 minutes. When this procedure was applied to ASR containing roughly 22% Cl, we found that it was possible to remove 98% of chlorine, 99.3% of sulfur and 100% of bromine from ASR in 2mol/L NaOH, heated at 190°C for 30 minutes. When studying the gross calorific value of the low degraded dehalogenation residue, we found it to be roughly 8000Kcal/kg, which was equivalent to coal. The study indicates that roughly 52% of the residue was recoverable, and 10% turned to ash, and the study suggests that the waste can be used as a densified refuse-derived fuel.
