Abstract

The transition of the automotive industry towards a circular economy requires viable solutions for end-of-life vehicle (ELV) reuse, recycling and recovery. This study tested the feasibility of two recycling processes intended, the first, to produce recycled plastic composite goods from selected plastic fractions extracted from ASRs, through a conventional mechanical process; the second, to use the remaining ASRs as a solid recovered fuel (SRF) to saturate the residual treatment capacity of the local (Turin, NW Italy) municipal solid waste (MSW) incineration plant. Samples of light (CER code 191004) and heavy (CER code 191204) ASRs were collected from an ELV authorized treatment facility, subjected to a complete characterization and tested for the two recycling options. The results demonstrated that selected fractions of thermoplastic polymers could be employed in a molding process for the production of recycled plastic composite goods. This fraction, equal to 2660 t/a, was more than 2% b.w. of the original ELV and 7.6% of the whole ASR waste product. The remaining ASR, after plastic extraction and recycling, had lower heating values (LHVs, 24 or 31 MJ/kg, depending on the original product) and chlorine content (< 50 mg/kg) that made it suitable to assume the status of SRF. In the present operating conditions, the Turin MSW incineration plant has a residual treatment capacity of at least 45,000 t/y, for waste with a LHV of 30 MJ/kg, that is approximately 30% more than the annual amount of ASRs produced in the Turin area. The application of mass and energy balances to the thermal process demonstrated that the addition of ASRs as an extra fuel to the incineration plant did not worse the quality of flue gases in terms of acid compound (HCl, SO₂) concentration and allowed the annual net electrical energy production to be increased from 31 to 38 MW.

Graphic Abstract

中文翻译：

---

回收和循环利用汽车碎纸机残渣（ASR）的循环方法：材料和热平衡

摘要

汽车工业向循环经济的过渡需要可行的解决方案，以解决报废汽车（ELV）的再利用，回收和再利用问题。这项研究测试了两种回收方法的可行性，第一种方法是，通过常规机械方法，从从ASR中提取的选定塑料馏分中生产回收的塑料复合材料。第二，将剩余的ASR用作固体回收燃料（SRF），以使当地（意大利西北部都灵，都灵）城市固体废物（MSW）焚化厂的剩余处理能力达到饱和。从ELV授权的处理设施中收集了轻型（CER代码191004）和重型（CER代码191204）ASR的样品，对其进行了全面表征，并测试了两种回收方法。结果表明，热塑性聚合物的选定部分可用于模塑过程中以生产再生塑料复合材料。该比例等于2660吨/年，占原始ELV的2％bw以上，占整个ASR废物产品的7.6％bw。剩余的ASR，经过塑料提取和回收后，具有较低的发热量（LHV，24或31 MJ / kg，取决于原始产品）和氯含量（<50 mg / kg），使其适合采用SRF状态。在目前的运行条件下，都灵城市固体废弃物焚化厂的LHV为30 MJ / kg的废物的剩余处理能力至少为45,000吨/年，这比该厂每年产生的ASR的年产量高出约30％。都灵地区。₂）集中并允许将年净电能产量从31兆瓦增加到38兆瓦。

图形摘要