Efficient waste polyester plastics recycling in organic–inorganic acid catalytic system

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161791 - 161791

Published: March 1, 2025

Language: Английский

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Chemical upcycling of poly(ethylene terephthalate) with binary mixed alcohols toward value-added copolyester by depolymerization and repolymerization strategy

Chemical Engineering Science, Journal Year: 2024, Volume and Issue: 294, P. 120103 - 120103

Published: April 12, 2024

Language: Английский

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Modeling Mechanochemical Depolymerization of PET in Ball-Mill Reactors Using DEM Simulations

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(24), P. 9003 - 9017

Published: June 4, 2024

Developing efficient and sustainable chemical recycling pathways for consumer plastics is critical mitigating the negative environmental implications associated with their end-of-life management. Mechanochemical depolymerization reactions have recently garnered great attention, as they are recognized a promising solution solvent-free transformation of polymers to monomers in solid state. To this end, physics-based models that accurately describe phenomena within ball mills necessary facilitate exploration operating conditions would lead optimal performance. Motivated by this, paper we develop mathematical model couples results from discrete element method (DEM) simulations experiments study mechanically-induced depolymerization. The DEM was calibrated validated via video experimental data computer vision algorithms. A systematic on influence ball-mill parameters revealed direct relationship between vibrating milling vessel total energy supplied system. Moreover, propose linear correlation high-fidelity simulation monomer yield poly(ethylene terephthalate) depolymerization, linking mechanical energetic variables. Finally, train reduced-order address high computational cost simulations. predicted working variables used inputs proposed expression which allows fast estimation yields.

Language: Английский

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Selective oxidative upcycling of PET plastic waste into aniline and terephthalic acid using nitrobenzene

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160970 - 160970

Published: Feb. 1, 2025

Language: Английский

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Process development and prospective life-cycle assessment of the mechanochemical depolymerization of polyethylene terephthalate

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161411 - 161411

Published: March 1, 2025

Language: Английский

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Upcycling of Waste Plastics into Value-Added Chemicals

Science for energy and environment., Journal Year: 2025, Volume and Issue: unknown, P. 4 - 4

Published: March 27, 2025

Review Upcycling of Waste Plastics into Value-Added Chemicals Jin Xu and Jing Zhang * State Key Laboratory Chemical Engineering, East China University Science Technology, 130 Meilong Road, Shanghai 200237, Correspondence: [email protected] Received: 8 November 2024; Revised: 22 January 2025; Accepted: 24 March Published: 27 2025 Abstract: The rapid increase in plastic production has led to a severe waste crisis, driving the development various recycling technologies mitigate this growing issue. However, these often encounter substantial economic environmental challenges their implementation. An increasingly attractive alternative is chemical upcycling, which can transform plastics value-added chemicals. This review systematically examines upcycling applicable major commercial plastics, including polyethylene terephthalate (PET), polyolefins, polystyrene (PS), polyvinyl chloride (PVC). We focus on key strategies such as solvolysis, catalytic pyrolysis, hydrocracking hydrogenolysis, along with some emerging approaches electrocatalysis photooxidation, aiming summarize trends plastics.

Language: Английский

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From waste to wealth: Glycolysis of PET for high-value resource utilization

Waste Management, Journal Year: 2025, Volume and Issue: 200, P. 114768 - 114768

Published: March 30, 2025

Language: Английский

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Safety challenges of mechanically recycled polyethylene terephthalate for food contact materials: A review

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 383, P. 125425 - 125425

Published: April 23, 2025

Language: Английский

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Chemical Depolymerization of Polyethylene Terephthalate and Its Blends: Enhanced Strategies for Efficient Circularity

Progress in Polymer Science, Journal Year: 2025, Volume and Issue: unknown, P. 101958 - 101958

Published: April 1, 2025

Language: Английский

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Cost‐Effective and Low‐Carbon Scalable Recycling of Waste Polyethylene Terephthalate Through Bio‐Based Guaiacol‐Enhanced Methanolysis

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

The global plastic waste crisis, particularly from polyethylene terephthalate (PET), demands sustainable recycling solutions. PET methanolysis offers a promising route to recover high-purity dimethyl (DMT), but achieving scalable, cost-effective, and environmentally friendly processes under mild conditions remains challenging. This study introduces bio-based catalytic system using guaiacol potassium bicarbonate (KHCO3) (120 °C, 0.6 MPa), 94% DMT 98% ethylene glycol (EG) yields within 2 h. Unlike conventional acid-catalyzed or co-solvent-assisted methods, the phenolic hydroxyl group of critically stabilizes tetrahedral intermediate, significantly enhancing efficiency. demonstrates broad versatility across various polyesters real-world streams, including mixed textiles colored plastics, while enabling selective depolymerization. Life cycle assessment (LCA) techno-economic analysis (TEA) confirm its low carbon footprint, energy efficiency, industrial viability. cost-effective scalable strategy solution for recycling, addressing both environmental economic challenges advancing resource circularity in industry.

Language: Английский

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