Chemical Communications, Год журнала: 2024, Номер unknown
Опубликована: Дек. 18, 2024
Overview of polyolefin (PO) plastic upcycling under mild conditions, utilizing diverse co-reactants to produce distinct product distributions.
Язык: Английский
Chemical Reviews, Год журнала: 2024, Номер 124(16), С. 9457 - 9579
Опубликована: Авг. 16, 2024
The large production volumes of commodity polyolefins (specifically, polyethylene, polypropylene, polystyrene, and poly(vinyl chloride)), in conjunction with their low unit values multitude short-term uses, have resulted a significant pressing waste management challenge. Only small fraction these is currently mechanically recycled, the rest being incinerated, accumulating landfills, or leaking into natural environment. Since are energy-rich materials, there considerable interest recouping some chemical value while simultaneously motivating more responsible end-of-life management. An emerging strategy catalytic depolymerization, which portion C-C bonds polyolefin backbone broken assistance catalyst and, cases, additional molecule reagents. When products molecules materials higher own right, as feedstocks, process called upcycling. This review summarizes recent progress for four major upcycling strategies: hydrogenolysis, (hydro)cracking, tandem processes involving metathesis, selective oxidation. Key considerations include macromolecular reaction mechanisms relative to mechanisms, design transformations, effect conditions on product selectivity. Metrics describing critically evaluated, an outlook future advances described.
Язык: Английский
Процитировано
26
Catalysis Science & Technology, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
A study of the synergistic effect Fe and Ce in microwave-assisted heterogeneous Fenton-type oxidation low-density polyethylene to value-added chemicals over a Fe–CeO 2 catalyst.
Язык: Английский
Процитировано
0
Science China Chemistry, Год журнала: 2025, Номер unknown
Опубликована: Март 19, 2025
Язык: Английский
Процитировано
0
Green Chemistry, Год журнала: 2024, Номер 26(20), С. 10390 - 10396
Опубликована: Янв. 1, 2024
Aqueous oxidative deconstruction of low-density polyethylene (LDPE) using homogeneous first-row transition metal catalysts under mild conditions (130–150 °C and 100 PSI oxygen pressure).
Язык: Английский
Процитировано
3
Science China Chemistry, Год журнала: 2024, Номер unknown
Опубликована: Авг. 23, 2024
Язык: Английский
Процитировано
2
Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 158823 - 158823
Опубликована: Дек. 1, 2024
Язык: Английский
Процитировано
2
Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences, Год журнала: 2024, Номер 382(2282)
Опубликована: Сен. 22, 2024
Our industry today is predominantly based on linear value chains. Raw materials are extracted from primary sources, processed into products, used, and disposed of at the end their life cycle. This economy causes a wide range negative environmental impacts owing to resulting greenhouse gas emissions pollution marine terrestrial ecosystems. Closed carbon cycles climate-neutral energy production essential for not only fuels but also all chemicals, including plastics fertilizers, counteract climate change further damage environment. In this regard, article discusses importance heterogeneous catalysts selected technologies associated with transformation resource base supply. It technological framework conditions net CO
Язык: Английский
Процитировано
0
Journal of the American Oil Chemists Society, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 29, 2024
Abstract The oxidation processes of unsaturated fatty acid methyl esters (FAMEs) and vegetable oils with molecular oxygen, proceeding through a radical mechanism, lead to the formation wide range compounds. primary products, hydroperoxides, undergo further decomposition form products lower weight or participate in cross‐linking reactions leading accumulation higher than raw material. A number researches note an increase concentration oligomeric during FAME. study literary sources made it possible establish that these substances correlates each other. mechanisms ester described literature suggest direct participation either acids hydroperoxides reactions. work examines main ways heavy “new” FAMEs.
Язык: Английский
Процитировано
0
Journal of Industrial Microbiology & Biotechnology, Год журнала: 2024, Номер 51
Опубликована: Янв. 1, 2024
There is a growing interest in developing methodology for effectively cleaving carbon-carbon (C-C) bonds polymer backbones through bioconversion processes that utilize microorganisms and their enzymes. This upsurge of driven by the goal achieving circular economy. Polyolefin post-consumer plastics are substantial source carbon, but recycling potential severely limited. Upcycling routes needed converting polyolefin into value-added products while concurrently mitigating adverse environmental effects. These materials contain carbon-based chemicals can, principle, serve as feedstock microbial metabolism. Some microbes have been reported to grow on plastics, rate biodegradation insufficient industrial processes. In this study, low-density polyethylene (LDPE) films were subjected two mild ozone-based oxidation treatments, which facilitated biodegradation. The degree was determined Fourier transform infrared spectroscopy via analysis carbonyl index (1,710/1,460 cm-1), ranged from 0.3 2.0, also carboxylic acid content. Following films, studies conducted investigate ability panel polyvinyl alcohol-degrading degrade oxidized films. A defined minimal medium used cultivate assess growth 45 days cultivation, most effective strains further cultivated up three additional generations film substrates improve LDPE After these enrichments, we identified strain third generation Pseudomonas sp. Rh926 exhibited significant cell reduced mass 25% 30 days, demonstrating an enhanced capacity degrading
Язык: Английский
Процитировано
0
Chemical Communications, Год журнала: 2024, Номер unknown
Опубликована: Дек. 18, 2024
Overview of polyolefin (PO) plastic upcycling under mild conditions, utilizing diverse co-reactants to produce distinct product distributions.
Язык: Английский
Процитировано
0