Nitrogenative Degradation of Polystyrene Waste

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

---

Catalytic chemical recycling and upcycling of polyolefin plastics

Giant, Год журнала: 2024, Номер 19, С. 100307 - 100307

Опубликована: Июнь 14, 2024

Polyolefins are the most produced and widely used polymeric materials. However, chemically inert nature of polyolefins has led to severe environmental pollution, posing a threat human sustenance development. Managing recycling polyolefin plastic waste is crucial for transition from linear sustainable circular economy. Catalytic chemical includes traditional techniques like pyrolysis photolysis, innovative methods that introduce cleavable bonds into chain closed-loop recycling. post-functionalization post-consumer materials another strategy tackle waste, aiming upgrade materials' utility contribute sustainability. Overall, developing catalytic deconstructing upcycling plastics essential encourage better reclamation practices reduce impact waste.

Язык: Английский

---

Strategies and Technologies for Sustainable Plastic Waste Treatment and Recycling

Environmental Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

---

Pore-Structure Engineering of Hierarchical β Zeolites for the Enhanced Hydrocracking of Waste Plastics to Liquid Fuels

ACS Catalysis, Год журнала: 2024, Номер 14(21), С. 16148 - 16165

Опубликована: Окт. 17, 2024

Hydrocracking of plastics over bifunctional hierarchical zeolites is promising for the upcycling into value-added products. However, exact role their acidic and textural properties toward catalytic activity remains unclear. Herein, we modified structure a β zeolite via dealumination desilication routes, resulting in zeolites. The parent samples were loaded with Ni studied hydrocracking virgin HDPE. In comparison to dealuminated zeolite, desilicated showed higher conversion 87.8% 66.7% products gasoline range, owing its significantly high properties. selectivity gasoline-range hydrocarbons further improved 95.9 69.2%, respectively, by addition. To unlock structure–activity correlation various samples, different activity-driven factors was studied, an empirical relationship that aligns observed conversions samples. Moreover, it possible achieve iso-paraffins optimization balance between metal-acid sites on Furthermore, both Ni-loaded good stability ability be regenerated under cyclic runs. best-performing also maintained postconsumer waste (conversion = 85–95%) when using mixture (88.4%). A life cycle assessment recent literature demonstrated advantages proposed modification routes achieving productivity (6.6–7.6 ggasoline/gcat·h) less environmental impact. Overall, these findings highlight noble-metal-free, easily modifiable, environmentally friendly enhanced liquid fuels.

Язык: Английский

---

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

---

Facile synthesis of nickel phyllosilicate for enhanced CO2 methanation: Interrelationships of silicon-containing precursors and the formation of intermediates

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 78, С. 1183 - 1191

Опубликована: Июль 3, 2024

Язык: Английский

---

Photooxidation of Polystyrene into High‐Value Chemicals

European Journal of Organic Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 5, 2024

Abstract Plastics play a crucial role in the survival and advancement of human civilization. However, increasing challenge plastic pollution presents significant obstacles. Disposal methods such as incineration landfilling result substantial resource wastage pose potential environmental hazards. The slow progress recycling reusing waste plastics hinders their industrial application effective response to crises. Photocatalysis offers promising solutions for future recycling, particularly with recent increase photocatalytic degradation polystyrene (PS). This review provides comprehensive overview latest advancements photooxidation PS into high‐value chemicals.

Язык: Английский

---

Reaction Engineering of the Hydrogenolysis of Liquid n-Alkanes: Comparison of Flow and Batch Reaction Systems

Chemical Engineering Journal Advances, Год журнала: 2024, Номер 21, С. 100701 - 100701

Опубликована: Дек. 28, 2024

Язык: Английский

---