Joung Hyun-Tae, Seo Yong-Chil, Kim Ki-Heon, Seo Yong-Chan
Department of Environmental Engineering, YIEST, Yonsei University, 234 Heungup, Wonju 220-710, South Korea.
Chemosphere. 2006 Nov;65(9):1481-9. doi: 10.1016/j.chemosphere.2006.04.018. Epub 2006 Jun 5.
End-of-life vehicles are dismantled to recover reusable parts and then sent to a shredding facility for steel material recovery. The residue generated from the shredding process, so-called automobile shredder residue, is now being mostly disposed in landfill, however landfill will be prohibited in the near future. More recycling and energy recovery must be made by the regulation. The most appropriate method is the thermal treatment that will produce various forms of fuels and less volume of vitrified residue. In this research, an automobile shredder residue was simulated with considering the residue from a shredding factory based on the new vehicle and thermally treated by pyrolysis or gasification to observe the yields of gas, oil and char. In the temperature range of 400-800 degrees C, the yields of gas, oil, and char were 38.7-45.8%, 12.3-18.2%, and 36.0-49.0%, respectively. The optimum pyrolyzing temperature for more oil production was around 600 degrees C. Emission characteristics of the byproducts, PCDDs, PCDFs and dioxin-like PCBs were studied at the temperature of 600 degrees C. The analysis on the concentration and distribution of the isomers in various forms of the products were completed with and without oxygen, PVC, and catalytic metals, in order to observe how the existence of oxygen, PVC, and catalytic metals affect the formation of PCDDs, PCDFs, and dioxin-like PCBs from pyrolysis or gasification process. Without PVC, no PCDDs, PCDFs and dioxin-like PCBs were found in any products. PCDFs were predominant in any conditions. Catalyst and oxygen were found to affect to form more PCDDs, PCDFs, and dioxin-like PCBs. Effects of catalyst and oxygen on the byproduct formation seemed to be similar in oil and gas while that was different in char.
报废车辆被拆解以回收可重复使用的部件，然后被送往破碎设施以回收钢铁材料。破碎过程产生的残渣，即所谓的汽车破碎残渣，目前大多被填埋处理，然而在不久的将来填埋将被禁止。根据相关规定，必须进行更多的回收利用和能源回收。最合适的方法是热处理，它将产生各种形式的燃料和少量的玻璃化残渣。在本研究中，根据一家破碎厂基于新车产生的残渣对汽车破碎残渣进行了模拟，并通过热解或气化进行热处理，以观察气体、油和焦炭的产率。在400 - 800摄氏度的温度范围内，气体、油和焦炭的产率分别为38.7 - 45.8%、12.3 - 18.2%和36.0 - 49.0%。为了生产更多的油，最佳热解温度约为600摄氏度。在600摄氏度的温度下研究了副产物多氯二苯并对二噁英（PCDDs）、多氯二苯并呋喃（PCDFs）和类二噁英多氯联苯（dioxin-like PCBs）的排放特性。完成了在有和没有氧气、聚氯乙烯（PVC）和催化金属的情况下各种产品中异构体的浓度和分布分析，以观察氧气、PVC和催化金属的存在如何影响热解或气化过程中PCDDs、PCDFs和类二噁英PCBs的形成。没有PVC时，在任何产品中都未发现PCDDs、PCDFs和类二噁英PCBs。在任何条件下PCDFs都是主要的。发现催化剂和氧气会影响形成更多的PCDDs、PCDFs和类二噁英PCBs。催化剂和氧气对副产物形成的影响在油和气中似乎相似，而在焦炭中则不同。
