Unraveling the role of water in mechanism changes for economically viable catalytic plastic upcycling

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Nov. 29, 2024

The surge in global plastic production, reaching 400.3 million tons 2022, has exacerbated environmental pollution, with only 11% of being recycled. Catalytic recycling, particularly through hydrogenolysis and hydrocracking, offers a promising avenue for upcycling polyolefin plastic, comprising 55% waste. This study investigates the influence water on depolymerization using Ru catalysts, revealing promotional effect when both metal acid sites, Brønsted site, are present. Findings highlight impact content, metal-acid balance, their proximity this interaction, as well role modulating isomerization process, affecting product selectivity. Additionally, interaction facilitates suppression coke formation, ultimately enhancing catalyst stability. A comprehensive techno-economic life cycle assessment underscores viability benefits presence water. These insights advance understanding offer strategies optimizing recycling processes. hydrocracking present approach plastics. Here, authors catalytic upcycling, emphasizing that catalysts an optimal balance significantly improve polyethylene is

Language: Английский

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Tandem Catalysis for Plastic Depolymerization: In Situ Hydrogen Generation via Methanol APR for Sustainable PE Hydrogenolysis

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

Published: Jan. 22, 2025

Abstract Depolymerizing plastic waste through hydrogen‐based processes, such as hydrogenolysis and hydrocracking, presents a promising solution for converting plastics into liquid fuels. However, conventional hydrogen production methods rely heavily on fossil fuels, exacerbating global warming. This study introduces novel approach to that utilizes in situ generated via the aqueous phase reforming (APR) of methanol, biomass‐derived chemical offering more sustainable alternative. Our results show bimetallic Ru−Pt/TiO 2 catalyst achieved high conversion (85.1 %) selectivity (81.0 towards fuels lubricant oils tandem process combining polyethylene (PE) methanol APR. By tuning metal loading, we identified Pt enhances APR, while Ru drives C−C bond cleavage, which is crucial PE hydrogenolysis. Isotope labeling analysis confirmed from APR effectively utilized reaction. method was also successfully applied post‐consumer polyolefin waste, with toward valuable products ranging 75.0 % 88.9 %. highlights an innovative strategy reduce reliance fossil‐fuel‐derived depolymerization, promoting both sustainability environmental protection.

Language: Английский

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Tandem Catalysis for Plastic Depolymerization: In Situ Hydrogen Generation via Methanol APR for Sustainable PE Hydrogenolysis

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

Published: Jan. 22, 2025

Depolymerizing plastic waste through hydrogen-based processes, such as hydrogenolysis and hydrocracking, presents a promising solution for converting plastics into liquid fuels. However, conventional hydrogen production methods rely heavily on fossil fuels, exacerbating global warming. This study introduces novel approach to that utilizes in situ generated via the aqueous phase reforming (APR) of methanol, biomass-derived chemical offering more sustainable alternative. Our results show bimetallic Ru-Pt/TiO2 catalyst achieved high conversion (85.1 %) selectivity (81.0 towards fuels lubricant oils tandem process combining polyethylene (PE) methanol APR. By tuning metal loading, we identified Pt enhances APR, while Ru drives C-C bond cleavage, which is crucial PE hydrogenolysis. Isotope labeling analysis confirmed from APR effectively utilized reaction. method was also successfully applied post-consumer polyolefin waste, with toward valuable products ranging 75.0 % 88.9 %. highlights an innovative strategy reduce reliance fossil-fuel-derived depolymerization, promoting both sustainability environmental protection.

Language: Английский

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Strategic conversion of industrial plastic waste into transportation fuel using iron and strontium containing metal waste as a catalyst

Fuel, Journal Year: 2025, Volume and Issue: 394, P. 135127 - 135127

Published: March 20, 2025

Language: Английский

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Advancements in Chemical Recycling Catalysts for Plastic Waste in South Korea

Catalysts, Journal Year: 2025, Volume and Issue: 15(5), P. 414 - 414

Published: April 23, 2025

Plastics are widely used in various industries because of their light weight, low cost, and high durability. The mass production consumption plastics have led to a rapid increase plastic waste problem, necessitating the development effective recycling technologies. chemical has emerged as promising strategy address these challenges, enabling conversion into high-purity monomers or oils, even from contaminated mixed feedstock. This review focuses on catalysts for South Korea, which one highest per capita rates both academic industrial efforts this field. We examine catalytic depolymerization processes recovering polymers, such polyethylene terephthalate (PET) polycarbonate (PC), well pyrolysis polyolefins, including (PE), polypropylene (PP), polystyrene (PS). By summarizing recent research initiatives highlights strategic role country advancing recycling. Moreover, proposes future directions reusable catalysts, energy-efficient process, strategies waste.

Language: Английский

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Next-Generation BiOCl/MXene Nanocomposites: Optimized for Dye Removal and Supercapacitor Applications

Langmuir, Journal Year: 2024, Volume and Issue: 40(43), P. 23018 - 23032

Published: Oct. 16, 2024

The study focuses on the development of an efficient and sustainable solution for synthetic dye degradation through hydrothermal synthesis BiOCl BiOCl/MXene heterostructures. Structural compositional properties were analyzed by using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), field emission scanning (FESEM), photoelectron spectroscopy (XPS) techniques. A significant reduction in band gap to 2.97 eV from 3.62 was observed via UV spectroscopy, leading enhanced photocatalysis with 89% efficiency just 12 min. mechanism involved reactive species confirmed LC-HRMS radical trapping tests, while ICP-MS verified metal content water before after degradation. Additionally, nanocomposite demonstrated a specific capacitance 431.24 F g

Language: Английский

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