Royal Institute of Technology (KTH), Department of Material Science and Engineering, Brinellvägen 23, 100 44 Stockholm, Sweden.
Royal Institute of Technology (KTH), Department of Material Science and Engineering, Brinellvägen 23, 100 44 Stockholm, Sweden.
Waste Manag. 2018 Jun;76:507-515. doi: 10.1016/j.wasman.2018.03.048. Epub 2018 Apr 5.
The automotive shredder residue (ASR) or shredder light fraction (SLF) is the remaining fraction from the metal recovery of end-of-life vehicles (ELVs). While processes for metal recovery from ELVs are well developed, the similar process for ASR remains a challenge. In this work, low-temperature pyrolysis of the ASR fraction was investigated under the assumption that a low temperature and inert environment would enhance the metal recovery, i.e. the metals would not be further oxidised from their original state and the organic material could be separated from the metals in the form of volatiles and char. Pyrolysis experiments were performed in a tube reactor operating at 300, 400 and 500 °C. The gas and oil obtained by pyrolysis were analysed by micro-GC (micro-Gas Chromatography) and GC/MS (Gas Chromatography/Mass Spectrometry), respectively. It was found that the gas produced contained a high amount of CO, limiting the energy recovery from this fraction. The oil consisted of a high concentration of phenolic and aromatic compounds. The solid residue was crushed and fractionated into different particle sizes for further characterization. The pyrolysis temperature of 300 °C was found to be insufficient for metal liberation, while the char was easier to crush at tested temperature of 400 and 500 °C. The intermediate temperature of 400 °C is then suggested for the process to keep the energy consumption low.
汽车破碎机残渣（ASR）或破碎机轻组分（SLF）是报废车辆（ELV）金属回收后的剩余部分。虽然 ELV 金属回收的工艺已经很成熟，但 ASR 的类似工艺仍然是一个挑战。在这项工作中，假设低温和惰性环境会增强金属回收效果，即金属不会从原始状态进一步氧化，并且有机材料可以以挥发物和焦的形式与金属分离，因此对 ASR 进行了低温热解实验。热解实验在 300、400 和 500°C 的管式反应器中进行。通过微 GC（微气相色谱）和 GC/MS（气相色谱/质谱）分别分析了热解得到的气体和油。结果发现，产生的气体中含有大量的 CO，限制了从该馏分中回收能量。油中含有高浓度的酚类和芳香族化合物。将固体残渣粉碎并分成不同的粒径进行进一步的特性分析。发现 300°C 的热解温度不足以使金属释放，而在 400 和 500°C 测试温度下，焦更容易粉碎。因此，建议采用 400°C 的中间温度来降低能耗。
