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Article

Influence of the Feedstock on the Process Parameters, Product Composition and Pilot-Scale Cracking of Plastics

1
Clariter Poland Sp. z o.o., 59A Żelazna Str., 00-848 Warszawa, Poland
2
Department of Organic Chemical Technology and Petrochemistry, Silesian University of Technology, 4B Krzywoustego Str., 44-100 Gliwice, Poland
*
Author to whom correspondence should be addressed.
Academic Editor: Manuel Ribeiro
Materials 2021, 14(11), 3094; https://doi.org/10.3390/ma14113094
Received: 30 April 2021 / Revised: 31 May 2021 / Accepted: 2 June 2021 / Published: 4 June 2021
Chemical recycling of polymers can lead to many different products and play a significant role in the circular economy through the use of plastic waste as a feedstock in the production of valuable materials. The polyolefins: polyethylene (PE) and polypropylene (PP), together with polystyrene (PS), can be chemically recycled by the thermal cracking (pyrolysis) process. In this study, continuous cracking of polyolefins and polystyrene in different proportions and with the addition of other polymers, like polyethylene terephthalate (PET) and polyvinyl chloride (PVC), was investigated at the pilot scale in terms of the process parameters and product yields. Gas chromatography with mass spectrometry (GC-MS) was used for the detailed analysis of the products’ compositions. The boiling temperature distribution and the bromine number were used for additional characterization of products. It was found that an increase of PP share caused a decrease in the process temperature, an increase of the product yield and a shift of the boiling range towards lighter products, increasing the content levels for unsaturates and branched hydrocarbons. It was observed that the addition of 5% PS, PET and PVC reduced the overall product yield, resulting in the creation of a lower-boiling product and increasing the conversion of polyethylene. An addition of 10% polystyrene increased the PP conversion and resulted in a higher product yield, without significant change in the boiling temperatures distribution. View Full-Text
Keywords: plastic waste; polyolefins; thermal cracking; pyrolysis; chemical recycling plastic waste; polyolefins; thermal cracking; pyrolysis; chemical recycling
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MDPI and ACS Style

Frączak, D.; Fabiś, G.; Orlińska, B. Influence of the Feedstock on the Process Parameters, Product Composition and Pilot-Scale Cracking of Plastics. Materials 2021, 14, 3094. https://doi.org/10.3390/ma14113094

AMA Style

Frączak D, Fabiś G, Orlińska B. Influence of the Feedstock on the Process Parameters, Product Composition and Pilot-Scale Cracking of Plastics. Materials. 2021; 14(11):3094. https://doi.org/10.3390/ma14113094

Chicago/Turabian Style

Frączak, Daria, Grażyna Fabiś, and Beata Orlińska. 2021. "Influence of the Feedstock on the Process Parameters, Product Composition and Pilot-Scale Cracking of Plastics" Materials 14, no. 11: 3094. https://doi.org/10.3390/ma14113094

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