Towards a Cradle‐to‐Cradle Polyolefin Lifecycle

Achieving efficient chemical depolymerization of waste polyolefins to monomers remains an unsolved challenge, while it could be an effective means to avoid further waste accumulation in the environment and generate economic benefits. In a recent publication by Conk et al., polyethylene (PE) is conve...

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Vydáno v:Angewandte Chemie International Edition Ročník 62; číslo 3; s. e202216163 - n/a
Hlavní autoři: Thevenon, Arnaud, Vollmer, Ina
Médium: Journal Article
Jazyk:angličtina
Vydáno: Germany Wiley Subscription Services, Inc 16.01.2023
Vydání:International ed. in English
Témata:
Catalysis
Catalysts
Depolymerization
Design optimization
Monomers
Polyethylene
Polyethylenes
Polymers
Polyolefins
Propylene
Recycling
Tandem Catalysis
Waste management
Waste streams
Depolymerization
Propylene
Polyethylene
Recycling
Tandem Catalysis
ISSN:1433-7851, 1521-3773, 1521-3773
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Shrnutí:Achieving efficient chemical depolymerization of waste polyolefins to monomers remains an unsolved challenge, while it could be an effective means to avoid further waste accumulation in the environment and generate economic benefits. In a recent publication by Conk et al., polyethylene (PE) is converted to propylene, the second most used monomer in the polymer industry. The conversion is achieved via a tandem catalysis approach in which partially unsaturated PE chains react with ethylene to generate propylene with yields as high as 87 %. The study is a first proof of concept showcasing a selective chemical depolymerization of PE to a monomer. Future research is expected to focus on the catalyst optimization, process design, and compatibility with contaminated and multi‐polymer waste streams. Selective depolymerization of polyethylene to propylene was achieved by two independent studies using a tandem catalysis approach. By combining a dehydrogenation, an isomerization and an ethenolysis catalyst under an ethylene atmosphere, propylene was the favoured product which could be further used as precursor for polypropylene production.
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ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.202216163