Waste and Biomass Valorization, Год журнала: 2025, Номер unknown
Опубликована: Июнь 4, 2025
Язык: Английский
Journal of the American Chemical Society, Год журнала: 2025, Номер unknown
Опубликована: Янв. 8, 2025
Owing to massive production and poor end-of-life management, plastic waste pollution has become one of the most pressing environmental crises. In response mounting crisis, past several decades have witnessed development numerous methods technologies for recycling. However, current recycling often produce low-quality or low-value products, making it difficult recover operating costs. To this end, we report a novel preoxygenation-induced strategy nitrogenative degradation real-life polystyrene plastics into high-value aromatic nitrogen compounds in cost-effective manner. Thus, expensive highly demanding benzonitrile as well benzamide were obtained up 74% overall isolated yield from by using CuBr catalyst, O2 oxidant, CH3CN source. Detailed mechanistic investigations indicate that hydroxyl radicals activation play role selective aerobic process. Furthermore, multiple reaction pathways contribute formation benzamide.
Язык: Английский
Процитировано
3
Journal of Analytical and Applied Pyrolysis, Год журнала: 2025, Номер unknown, С. 107016 - 107016
Опубликована: Фев. 1, 2025
Язык: Английский
Процитировано
2
Journal of the American Chemical Society, Год журнала: 2025, Номер unknown
Опубликована: Фев. 26, 2025
Polystyrene (PS) is a widely used thermoplastic polymer, but its very low recycling rate has motivated consideration of chemical conversion strategies to convert waste PS into value-added products. Oxidation methods have been studied, they typically generate benzoic acid, product with relatively market demand. Phenol higher volume that would be an appealing target, no currently exist for the phenol. The repeat unit in closely resembles cumene, primary feedstock produce phenol through Hock process. Here, we investigate prospects adapting process PS, generating hydroperoxides autoxidation benzylic C-H bonds followed by acid-promoted rearrangement afford and partially oxygenated polymer. Experimental computational studies dimeric trimeric model compounds show neighboring phenyl rings impose conformational constraints raise barrier hydrogen-atom transfer from tertiary bond. These effects are also evident contribute lower yields when subjected conditions. results provide valuable insights important implications other efforts seek adapt small-molecule reactivity polymeric feedstocks.
Язык: Английский
Процитировано
1
AIChE Journal, Год журнала: 2025, Номер unknown
Опубликована: Март 28, 2025
Abstract We integrate reverse reaction pathway screening, process design and simulation, assessment to ensure the technical feasibility, economic viability, environmental sustainability of biorefineries. propose an efficient production for 2‐vinylfuran that fully utilizes second‐generation biomass. Economic indicates this can produce at a competitive cost $1021 per ton when capacity reaches 366 kt/year, supported by reasonable policy initiatives. Sensitivity analysis using Monte Carlo simulations suggests investment risk project could be as low 26% scaled up 500 kt/year. A comparative life cycle highlights significant benefits 2‐vinylfuran: its reduces global warming potential (GWP) non‐renewable energy use (NREU) over 42% 30%, respectively, compared styrene production. Furthermore, carbon selectivity yield reach high 25.2% 36.2%.
Язык: Английский
Процитировано
1
BJC Reports, Год журнала: 2025, Номер 3(1)
Опубликована: Янв. 22, 2025
Abstract Single-use plastics (SUPs) are used widely in cancer research laboratories. They cheap, durable, and lightweight, until now have been considered disposable items. This, however, contributes significantly to unsustainable waste production. SUP is typically diverted landfill or incineration, which greenhouse gas emissions, taking many years degrade. Lack of robust disposal streams, particularly labs has long term effects on the environment. Having identified that a single laboratory researcher our group generates at least 15 kg tissue culture alone each year, we explore some issues associated with SUPs pre-clinical oncology research, discussing potential reuse routes, alternative materials for labware developing circular approaches plastic consumption address green agenda. We also propose recommendations improving sustainability labs.
Язык: Английский
Процитировано
0
Chinese Journal of Polymer Science, Год журнала: 2025, Номер unknown
Опубликована: Фев. 24, 2025
Язык: Английский
Процитировано
0
Journal of Environmental Management, Год журнала: 2025, Номер 380, С. 124867 - 124867
Опубликована: Март 12, 2025
Язык: Английский
Процитировано
0
Science for energy and environment., Год журнала: 2025, Номер unknown, С. 4 - 4
Опубликована: Март 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.
Язык: Английский
Процитировано
0
Water Air & Soil Pollution, Год журнала: 2025, Номер 236(6)
Опубликована: Апрель 24, 2025
Язык: Английский
Процитировано
0
Journal of Polymers and the Environment, Год журнала: 2025, Номер unknown
Опубликована: Апрель 26, 2025
Язык: Английский
Процитировано
0