Selective Asymmetric Hydrogenation of Waste Polyethylene Terephthalate via Controlled Sorption through Precisely Tuned Moderate Acid Sites DOI
Yue Zhu,

Zhouying Mao,

Weixiang Wu

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: March 13, 2025

The partial hydrogenation of waste polyethylene terephthalate (PET) offers a great opportunity to produce valuable chemicals, yet achieving precise catalytic control remains challenging. Herein, for the first time, we realized one-pot selective PET p-toluic acid (p-TA) with record-high yield 53.4%, alongside 36.4% p-xylene (PX), using specially designed PtW/MCM-48 catalyst. Mechanistic investigations revealed that exceptional performance arises from synergistic interaction between Pt nanoparticles and WOx species. Low-valent enhances dispersion, while stabilizes as low-polymerized polytungstates. moderate acidity PtW1.5/MCM-48 ensures controlled desorption p-TA, preventing overhydrogenation PX. catalyst demonstrated robust real-world waste. Life cycle assessment technical economic evaluation further highlight its practical feasibility. This study establishes sustainable pathway chemical upcycling provides framework designing advanced catalysts reactions, addressing critical challenges in circular chemistry plastic management.

Language: Английский

Upcycling of Plastic Waste Using Photo-, Electro-, and Photoelectrocatalytic Approaches: A Way toward Circular Economy DOI
Devanshu Sajwan,

Anitya Sharma,

Manisha Sharma

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(7), P. 4865 - 4926

Published: March 18, 2024

Rapid industrialization and development have led to a tremendous increase in the use of various types plastic commodities daily life. For past several years, pollution has become global issue, posing serious threat mankind. The primary issue with increasing is lack proper management which created huge havoc environment. From initial phase waste management, been discarded, recycled, downcycled, or dumped into landfills large proportion, causing extreme damage ecosystem. Conventionally, treated via thermal processes such as pyrolysis incineration plants require amount capital and, therefore, harms aim circular economy. Chemical upcycling gaining attention high-potential catalytic strategy convert plastics, polyethylene terephthalate, polyethylene, polystyrene, etc. fuels, functionalized polymers, other value-added chemicals having direct impact on affordability viability. In this review, we focused photocatalysis, electrocatalysis, photoelectrocatalysis effective efficient technologies. These approaches can lower dependence nonrenewable resources are more environmentally friendly contrast conventional approaches. This review elaborately discusses pros cons provides detailed overview potential renewable energy-driven for conversion wastes valuable fuels commodity chemicals, along challenges future directions emerging approach treatment.

Language: Английский

Citations

48
Recent advances in oxidative degradation of plastics DOI Creative Commons
Sewon Oh, Erin E. Stache

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(14), P. 7309 - 7327

Published: Jan. 1, 2024

Oxidative degradation is a powerful method to degrade plastics into oligomers and small oxidized products. While thermal energy has been conventionally employed as an external stimulus, recent advances in photochemistry have enabled photocatalytic oxidative of polymers under mild conditions. This tutorial review presents overview degradation, from its earliest examples emerging strategies. briefly discusses the motivation development with focus on underlying mechanisms. Then, we will examine modern studies primarily relevant catalytic degradation. Lastly, highlight some unique using unconventional approaches for polymer such electrochemistry.

Language: Английский

Citations

26
Chemical recycling of polyester textile wastes: shifting towards sustainability DOI

Théo El Darai,

Alexandra Ter-Halle,

Muriel Blanzat

et al.

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(12), P. 6857 - 6885

Published: Jan. 1, 2024

Amongst all synthetic polymers used in the clothing industry, polyethylene terephthalate (PET) is most widely polyester, its fibres representing half total PET global market (in comparison bottle being less than a third).

Language: Английский

Citations

24
Acid catalyst screening for hydrolysis of post-consumer PET waste and exploration of acidolysis DOI
Patrícia Pereira,

Phillip E. Savage,

Christian W. Pester

et al.

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(4), P. 1964 - 1974

Published: Jan. 1, 2024

We screen various acid catalysts (mineral, carboxylic, carbonic acids, zeolites, ionic liquids, and metal salts) for PET hydrolysis.

Language: Английский

Citations

21
The Current State-of-the-Art of the Processes Involved in the Chemical Recycling of Textile Waste DOI Creative Commons
Urbain Nshokano Ndagano,

Laura Cahill,

Ciara Smullen

et al.

Molecules, Journal Year: 2025, Volume and Issue: 30(2), P. 299 - 299

Published: Jan. 13, 2025

The textile industry’s rapid growth and reliance on synthetic fibres have generated significant environmental pollution, highlighting the urgent need for sustainable waste management practices. Chemical recycling offers a promising pathway to reduce by converting used into valuable raw materials, yet technical challenges remain due complex compositions of waste, such as dyes, additives, blended fabrics.

Language: Английский

Citations

2
Co-upcycling of polyethylene terephthalate and polyoxymethylene into valuable chemicals DOI
Jiarui Li, Xingbo Shi, Meiqi Zhang

et al.

Chem Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 101232 - 101232

Published: Jan. 1, 2025

Language: Английский

Citations

2
Implications of damming and morphological diversity of microplastics in the sediment from a tropical freshwater reservoir DOI
Lucas Gonçalves Queiroz, Marcelo Pompêo, Beatriz Rocha de Moraes

et al.

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(2), P. 112234 - 112234

Published: Feb. 17, 2024

Language: Английский

Citations

13
Polyethylene Terephthalate (PET) Recycled by Catalytic Glycolysis: A Bridge toward Circular Economy Principles DOI Open Access
Andra-Cristina Enache, Ionela Grecu, Petrişor Samoilă

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(12), P. 2991 - 2991

Published: June 18, 2024

Plastic pollution has escalated into a critical global issue, with production soaring from 2 million metric tons in 1950 to 400.3 2022. The packaging industry alone accounts for nearly 44% of this production, predominantly utilizing polyethylene terephthalate (PET). Alarmingly, over 90% the approximately 1 PET bottles sold every minute end up landfills or oceans, where they can persist centuries. This highlights urgent need sustainable management and recycling solutions mitigate environmental impact waste. To better understand PET's behavior promote its within circular economy, we examined chemical physical properties, current strategies most effective methods available today. Advancing economy framework by closing industrial loops demonstrated benefits such as reduced landfill waste, minimized energy consumption, conserved raw resources. end, identified various based on R-imperatives (ranging 3R 10R), focusing latest approaches aimed at significantly reducing waste 2040. Additionally, comparison (including primary, secondary, tertiary, quaternary recycling, along concepts "zero-order" biological techniques) was envisaged. Particular attention paid heterogeneous catalytic glycolysis, which stands out rapid reaction time (20-60 min), high monomer yields (>90%), ease catalyst recovery reuse, lower costs, enhanced durability. Accordingly, use highly efficient oxide-based catalysts glycolytic degradation is underscored promising solution large-scale applications.

Language: Английский

Citations

13
Recycling and depolymerisation of poly(ethylene terephthalate): a review DOI

Mengjin Wang,

Yaoqin Li,

Lin Zheng

et al.

Polymer Chemistry, Journal Year: 2024, Volume and Issue: 15(7), P. 585 - 608

Published: Jan. 1, 2024

This review discusses the physical-, chemical recycling and biodegradation processes mechanisms of PET, proposing effecting compromise between its overall properties conferred intrinsic biodegradability by modified monomer polymerisation.

Language: Английский

Citations

9
Studies on hydrolysis/alcoholysis/ammonolysis mechanisms of ethylene terephthalate dimer using DFT method DOI Creative Commons

Jinbao Huang,

Weifeng Xu,

Yang Long

et al.

Arabian Journal of Chemistry, Journal Year: 2024, Volume and Issue: 17(4), P. 105719 - 105719

Published: March 7, 2024

Hydrolysis/alcoholysis/ammonolysis are considered as viable routes for efficient degradation and recycling of polyethylene terephthalate waste plastic. The possible hydrolysis/alcoholysis/ammonolysis pathways the ethylene dimer were investigated by density functional theory (DFT) method M06/cc-pVDZ. geometric structure optimization frequency calculation various intermediates, transition states products involved in reaction carried out to obtain thermodynamic kinetic parameter values. results show that energy barrier cracking process can be reduced under conditions hydrolysis/alcoholysis/ammonolysis, which makes easier. Additionally, at 298 K 1 atm, total rate constants 1.51 × 10-43 cm3 molecular-1s−1, 1.86 10-41 2.82 10-40 respectively. hydrolysis mainly terephthalic acid glycol; alcoholysis dimethyl ammonolysis include terephthalamide glycol. Furthermore, this study shows Gibbs free change is negatively correlated with temperature an increase enhance spontaneity reaction.

Language: Английский

Citations

9