Effective and efficient dehalogenation for automobile shredder residue (ASR) was successfully carried out in an NaOH/ethylene glycol solvent at 190 °C with an up-scale ball mill reactor. The element content and plastic in different fractions of ASR samples were analyzed. 1.2 ± 0.4 wt% Cl and 0.1 ± 0.1 wt% Br were measured in the fine mixture of ASR; consequently, dehalogenation was essential to mitigate the formation of hazardous compounds during thermal treatment. Sufficiently high dechlorination and debromination capacities were obtained by adjusting ball numbers and NaOH content, and the effectiveness of the treatment for throughput scale-up was confirmed. Dehalogenated ASR achieved lower than 0.1 wt% of Cl and negligible Br content, making the product suitable for feedstock recycling to recover metals and petrochemicals. We performed a life cycle assessment on the up-scale dehalogenation process and identified two beneficial impacts in comparison with the landfilling of ASR: reductions in carcinogenic effects and ecotoxicity. To mitigate impacts on climate change and resource depletion, improving dehalogenation efficiency by scaling up the throughput, enhancing the heat insulation system, and including a process for ethylene glycol recycling need to be considered.

使用大型球磨机反应器，在190°C的NaOH /乙二醇溶剂中成功有效地进行了汽车粉碎残渣（ASR）的脱卤。分析了不同含量的ASR样品中的元素含量和塑性。在ASR的精细混合物中测得1.2±0.4 wt％的Cl和0.1±0.1 wt％的Br; 因此，脱卤对于减轻热处理过程中有害化合物的形成至关重要。通过调节球数和NaOH含量可以获得足够高的脱氯和脱溴能力，并且证实了该处理对于提高产量的有效性。脱卤的ASR的Cl含量低于0.1 wt％，Br含量可忽略不计，使该产品适用于原料循环以回收金属和石化产品。我们对高档脱卤工艺进行了生命周期评估，并发现了与ASR垃圾填埋相比有两个有益的影响：致癌作用的降低和生态毒性。为了减轻对气候变化和资源枯竭的影响，需要考虑通过扩大生产量，增强隔热系统以及包括乙二醇回收工艺来提高脱卤效率。