Direct synthesis of a high-density aviation fuel using a polycarbonate

Wang, Lulin; Han, Fengan; Li, Guangyi; Zheng, Min; Wang, Aiqin; Wang, Xiaodong; Zhang, Tao; Ye, Cong; Li, Ning

doi:10.1039/d0gc03426f

Cited by 24 publications

(18 citation statements)

References 45 publications

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“…[188,189] The current annual worldwide production of PC is around 6 million tons. [190] Polymers manufactured via polycondensation can be recycled more effortlessly than those made by other polymerization methods. [191] However, in the case of PC, the release of bisphenol A (BPA), which is a toxic compound and a known endocrine disruptor, may cause harm to humans and also to the environment.…”

Section: Polycarbonatementioning

confidence: 99%

Strategic Approach Towards Plastic Waste Valorization: Challenges and Promising Chemical Upcycling Possibilities

et al. 2021

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Plastic waste, which is one of the major sources of pollution in the landfills and oceans, has raised global concern, primarily due to the huge production rate, high durability, and the lack of utilization of the available waste management techniques. Recycling methods are preferable to reduce the impact of plastic pollution to some extent. However, most of the recycling techniques are associated with different drawbacks, high cost and downgrading of product quality being among the notable ones. The sustainable option here is to upcycle the plastic waste to create high-value materials to compensate for the cost of production. Several upcycling techniques are constantly being investigated and explored, which is currently the only economical option to resolve the plastic waste issue. This Review provides a comprehensive insight on the promising chemical routes available for upcycling of the most widely used plastic and mixed plastic wastes. The challenges inherent to these processes, the recent advances, and the significant role of the science and research community in resolving these issues are further emphasized.

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Section: Polycarbonatementioning

confidence: 99%

Strategic Approach Towards Plastic Waste Valorization: Challenges and Promising Chemical Upcycling Possibilities

et al. 2021

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“…Another one‐pot catalytic system for PC upcycling used Raney metals (e. g., Ni, Co, Fe, Cu) as the catalyst and isopropanol as both solvent and hydrogen donor, producing a mixture of C 6 –C 15 oxygenates and cycloalkanes (Figure 10). [65] Raney Ni was the most active among all Raney metals and afforded C 6 –C 15 oxygenates with a yield of more than 60 % after reaction at 463 K for 1 h. The yield of C 6 –C 15 cyclic hydrocarbons was about 31 %. A temperature up to 523 K promoted the hydrodeoxygenation of oxygenates into hydrocarbons, but hydrocarbons yield was only slightly enhanced.…”

Section: Liquid Hydrocarbonsmentioning

confidence: 96%

“…It has been reported that the two reactions can be conducted sequentially or in one-pot, depending on the solvents and catalysts that were applied in the system (Figure 10). [63][64][65] For instance, in a two-step process, PC underwent alcoholysis with methanol generated bisphenol A in a yield up to 90 % in the absence of any catalyst at 453 K. Then a dual catalyst composed of Pt/C and H-β catalyzed the subsequent hydrodeoxygenation of bisphenol A in 3 MPa H 2 at 413 K, affording jet fuel-range C 15 cycloalkanes with a high yield of 87 %. [63] The excellent performance of this dual catalyst is contributed to high activity of Pt/C for hydrogenation of the benzene ring in bisphenol A, and the relatively high pore size and acidity of H-β (compared to other zeolites such as HZSM-5 and MOR), which favored intermediates diffusion and promoted dehydration of hydroxy groups.…”

Section: Catalytic Conversion Of Plastics With Aromatic Monomers To J...mentioning

confidence: 99%

Upcycling Plastic Wastes into Value‐Added Products by Heterogeneous Catalysis

et al. 2022

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Plastics are playing essential roles in the modern society. The majority of them enter environment through landfilling or discarding after turning into wastes, causing severe carbon loss and imposing high risk to ecosystem and human health. Currently, physical recycling serves as the primary method to reuse plastic waste, but this method is limited to thermoplastic recycling. The quality of recycled plastics gradually deteriorates because of the undesirable degradation in the recycling process. Under such background, catalytic upcycling, which can upgrade various plastic wastes into value-added products under mild conditions, has attracted recent attention as a promising strategy to treat plastic wastes. This Review highlights recent advances in the development of efficient heterogeneous catalysts and useful strategies for upcycling plastics into liquid hydrocarbons, arene compounds, carbon materials, hydrogen, and other value-added chemicals. The functions of catalysts and the reaction mechanisms are discussed. The key factors that influence the catalytic performance are also analyzed.

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“…After several recycling cycles, PCs ends up in landfills or incineration. Several chemical processes of pyrolysis, hydrolysis, alcoholysis, and aqueous phase hydrodeoxygenation (APHDO) [27] have been reported regarding PC depolymerization and valorization.…”

Section: Polycarbonatementioning

confidence: 99%

Waste to Wealth: Chemical Recycling and Chemical Upcycling of Waste Plastics for a Great Future

et al. 2021

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The linear approach to resource utilization has led to the accumulation of waste plastic in the environment for decades. Unfortunately, both traditional mechanical recycling and incineration have faced their bottlenecks that have always resulted in quality deterioration and value recovery failures. Recently, chemical recycling and upcycling processes, including the conversion of plastics into their virgin monomers, liquid fuels, or chemical feedstocks to produce value-added products, have been identified as the most promising strategy for recovering value from waste plastics. However, these methods are often cost prohibitive and relying on stringent conditions compared to current recycling methods. Accordingly, this Minireview summarizes recent trends and achievements in the chemical recycling and upcycling of waste plastics. We highlight three research topics: depolymerization of plastics into monomers; degradation of plastics into liquid fuels and waxes; and conversion of plastics into hydrogen, fine chemical feedstocks, and value-added functional materials. Indeed, chemical recycling and upcycling is a bright path to a circular and environmentally friendly plastic economy.

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Direct synthesis of a high-density aviation fuel using a polycarbonate

Abstract: A high-density cyclic hydrocarbon mixture was first synthesized by a one-pot transfer hydrodeoxygenation of a polycarbonate.

Cited by 24 publications

References 45 publications

Strategic Approach Towards Plastic Waste Valorization: Challenges and Promising Chemical Upcycling Possibilities

Strategic Approach Towards Plastic Waste Valorization: Challenges and Promising Chemical Upcycling Possibilities

Upcycling Plastic Wastes into Value‐Added Products by Heterogeneous Catalysis

Waste to Wealth: Chemical Recycling and Chemical Upcycling of Waste Plastics for a Great Future

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