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Genuino, Homer

Heeres, Hero J.

Kersten, Sascha R.A.

Ruiz, M. Pilar

English

Engineering Conferences International

Thursday, May 11, 2023                                                                                                                           Plenary 4 PYROLYSIS OF MIXED PLASTIC WASTE (DKR350)  M. Pilar Ruiz, Sustainable Process Technology, Faculty of Science and Technology, University of Twente, the Netherlands Homer Genuino, Sustainable Process Technology, Faculty of Science and Technology, University of Twente, the Netherlands Hero J. Heeres, Engineering and Technology Institute Groningen, Department of Chemical Engineering, University of Groningen, the Netherlands Sascha R.A. Kersten, Sustainable Process Technology, Faculty of Science and Technology, University of Twente, the Netherlands   Key Words: Plastic waste, pyrolysis, chemical recycling.  Pyrolysis is a promising chemical recycling alternative to convert plastic waste into oil/wax products, which could be further processed in a steam or naphtha cracker or a refinery to produce chemicals or fuels. We present a study on the pyrolysis on a plastic packaging waste stream, DKR-350, which is the fraction of that remains after all the reusable plastics have been removed.1 The feedstock was pretreated by washing it with water and chemicals, and the effect of the pretreatment in the pyrolysis oil/wax yield and composition was analyzed. Pyrolysis experiments were carried out in a batch reactor at 500 °C. The results indicated that the washing pretreatment did not influence the overall condensable product yield (~68 %, Figure 1), nor the amount of chlorine that remains in the product (~200 ppm). Intensive characterization of the feedstocks and the products help to have a better understanding on the process and the major challenges and limitations of pyrolyzing plastic waste (e.g., oxygen content, impurities).          References [1] M.T. Brouwer, E.U.T. van Velzen, A. Augustinus, H. Soethoudt, S. De Meester, K. Ragaert, Predictive model for the Dutch post-consumer plastic packaging recycling system and implications for the circular economy, Waste Manag. 71 (2018) 62–85. [2] H. Genuino, M.P. Ruiz, H.J. Heeres, S.R.A. Kersten. Pyrolysis of mixed plastic waste (DKR-350): Effect of washing pre-treatment and fate of chlorine, Fuel Proc. Tech. 233 (2022) 107304. Figure 1 – Pyrolysis product yields (wt.%), and organics and ash removal (wt. %) in the pretreatment step. Adapted from Ref.2. 

Pyrolysis of plastic waste: effect of feedstock pretreatment and fate of contaminants

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Pyrolysis of plastic waste: effect of feedstock pretreatment and fate of contaminants

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Engineering Conferences International