Depolymerization within a Circular Plastics System

Chemical Reviews, Год журнала: 2024, Номер 124(5), С. 2617 - 2650

Опубликована: Фев. 22, 2024

The societal importance of plastics contrasts with the carelessness which they are disposed. Their superlative properties lead to economic and environmental efficiency, but linearity puts climate, human health, global ecosystems at risk. Recycling is fundamental transitioning this linear model into a more sustainable, circular economy. Among recycling technologies, chemical depolymerization offers route virgin quality recycled plastics, especially when valorizing complex waste streams poorly served by mechanical methods. However, exists in interlinked system end-of-life fates, complementarity each approach key environmental, economic, sustainability. This review explores recent progress made five commercial polymers: poly(ethylene terephthalate), polycarbonates, polyamides, aliphatic polyesters, polyurethanes. Attention paid not only catalytic technologies used enhance efficiencies also interrelationship other systemic constraints imposed Novel polymers, designed for depolymerization, concisely reviewed terms their underlying chemistry potential integration current plastic systems.

Язык: Английский

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Sustainable thermochemical plastic valorization towards a circular economy: a critical review

Green Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Emerging technologies-empowered thermochemical plastic valorization is developed for value-added products in green and practical manner, which are beneficial to achieving circular economy several UN sustainable development goals.

Язык: Английский

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From sustainable macro debris chemical recycling to microplastic reclamation: Overview, research challenges, and outlook

Journal of Cleaner Production, Год журнала: 2024, Номер 454, С. 142281 - 142281

Опубликована: Апрель 22, 2024

Язык: Английский

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Synergistic catalysis for promoting selective C−C/C−O cleavage in plastic waste: Structure-activity relationship and rational design of heterogeneous catalysts for liquid hydrocarbon production

Chemical Communications, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

The review examines the structure–function relationship and outlines future directions to develop heterogeneous catalysts for C–C C–O bonds cleavage in plastic waste upcycling real-world into chemicals fuels.

Язык: Английский

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Mixed polyester recycling can enable a circular plastic economy with environmental benefits

One Earth, Год журнала: 2024, Номер 7(12), С. 2204 - 2222

Опубликована: Дек. 1, 2024

Язык: Английский

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Reductive Upcycling of Polyolefins, Polyesters and Mixed Plastic Wastes to Valuable Chemicals: Bridging Chemical Catalysis With Plastic Waste Management

Advanced Sustainable Systems, Год журнала: 2025, Номер unknown

Опубликована: Март 20, 2025

Abstract The unmatched applications of plastic commodities are evident from the enormous production, reaching over 400 million tons per year in recent times. Contrastingly, lack proper management leads to a large accumulation waste, majorly including polyolefins and polyesters. Conventional methods possess significant drawbacks like cost‐ineffectiveness greenhouse gas emissions. Over last decade, chemical processes have shown promising potential for but only hold 0.1% share recycling. catalytic offer excellent protocols obtain high‐value liquid fuels, waxes, chemicals waste. This review presents an elaborate discussion on state art reductive upcycling polyolefins, polyesters, mixed initially discusses alarming statistics plastics conventional approaches followed by introduction processes. Further, various recently reported strategies been elaborated detail catalyst deactivation, technoeconomic analysis, life cycle assessment deeper understanding current this research field. Finally, detailed summary along with existing challenges countermeasures is discussed open new avenues waste research.

Язык: Английский

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3D Printing with Recycled PET as a Sustainable Thermoplastic Alternative Comparing Printed and Filament Material Properties

Polymer-Plastics Technology and Materials, Год журнала: 2025, Номер unknown, С. 1 - 15

Опубликована: Май 17, 2025

Язык: Английский

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Cyclone Separation Process for Sorting Small-Format Plastics

ACS Sustainable Chemistry & Engineering, Год журнала: 2024, Номер 12(19), С. 7300 - 7308

Опубликована: Апрель 29, 2024

Small format plastics are defined as being less than 2 in. long in two or more dimensions and include items such loose bottle caps, small cosmetic packaging, toothbrushes. Current material recovery facility (MRF) infrastructure is usually not designed to recover these smaller objects which typically fall through screens the glass separation unit operation. A cyclone process has been developed separate small-format from glass, improving purity of stream allowing be returned plastic sorting stream. Utilizing density, sends lighter materials a side outlet (plastics) collects heavier (glass) bottom, resulting purified streams. With current small-scale prototype, efficiencies greater 94% have observed. The life-cycle assessment technoeconomic analysis indicate that this new step would increase global warming potential savings improve profitability MRFs.

Язык: Английский

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Technoeconomic Analysis for Biodegradable and Recyclable Paper Coated with Synthetic Ionic PBAT for Packaging Application

ACS Sustainable Chemistry & Engineering, Год журнала: 2024, Номер 12(33), С. 12576 - 12583

Опубликована: Авг. 6, 2024

This study presents a technoeconomic analysis (TEA) for novel ionic polybutylene adipate-co-terephthalate (PBAT), CPBAT, as paper coating material, showcasing excellent water and oil resistance. TEA determined total capital investment, operating costs, minimum selling prices production capacity of 1,000 kg CPBAT per day. The coated on Kraft (CPBAT-K) CPABT starch-coated (CPBAT-S) are estimated to be $1.327/m2 $1.864/m2, respectively. Additionally, the results sensitivity show that CPBAT-K CPBAT-S is highly sensitive capacity, raw material energy efficiency process, reaction energy, yield. Recovery ionization solvent only marginally increases CPBAT-S, hence, it favorable. By increasing lowering using energy-efficient machines, partially recovering from reactions, can reduced $0.588/m2 $0.914/m2, Given commercial polyethylene-coated range $0.94/m2 $1.850/m2, CPBAT-based papers with comparable mechanical barrier properties along biodegradability recyclability positioned competitive sustainable alternatives in market.

Язык: Английский

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Degradable branched and cross-linked polyesters from a bis(1,3-dioxolan-4-one) core

Polymer Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

Reaction of diols and triols with a bis(1,3-dioxolan-4-one) core derived from tartaric acid affords topologically diverse cross-linked branched polyesters that are both reprocessable hydrolytically degradable.

Язык: Английский

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