Catalytic stepwise pyrolysis of packaging plastic waste

► Catalytic pyrolysis enhances the quality of pyrolysis products compared to thermal pyrolysis. ► The dechlorination step is an unavoidable step in order to reduce the chlorine content of the pyrolysis liquids. ► The low-temperature dechlorination step decreases catalyst activity, therefore it must be carried out in the absence of catalyst. ► Catalytic stepwise pyrolysis produces low chlorine content and valuable pyrolysis liquids.