Catalytic stepwise pyrolysis of packaging plastic waste
- 作者：A. Lopez-Urionabarrenechea ; alex.lopez@ehu.es ; I. de Marco ; B.M. Caballero ; M.F. Laresgoiti ; A. Adrados
- 关键词：Stepwise pyrolysis ; Feedstock recycling ; Catalytic decomposition ; Plastic waste ; ZSM-5 zeolite ; Dechlorination
- 刊名：Journal of Analytical and Applied Pyrolysis
- 出版年：2012
- 期刊代码：46_01652370
- 类别：ch
- 出版时间：July, 2012
- 卷：96
- 期：Complete
- 页码：54-62
- 文件大小：538 K
摘要
In this paper the combination of catalytic and stepwise pyrolysis is explored. A mixture of polyethylene (PE), polypropylene (PP), polystyrene (PS), poly(ethylene terephthalate) (PET) and poly(vinyl chloride) (PVC), which resembles real municipal plastic waste, has been pyrolysed in a 3.5 dm3 semi-batch reactor at 440 掳C for 30 min using a ZSM-5 zeolite as catalyst. A low temperature (300 掳C) dechlorination step has been carried out both with and without catalyst. It has been proved that the application of such dechlorination step gives rise to a 75 wt%reduction of chlorine in the liquid fraction. However, such step has a negative influence on the catalyst, which loses some catalytic activity. The optimum procedure in terms of quality and chlorine content of the products is the combination of first a low temperature step without catalyst, and second the catalytic pyrolysis step.