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Rapid chemical recycling of waste polyester plastics catalyzed by recyclable catalyst
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作者 Yu-Ji Luo Jia-Yin Sun Zhi Li 《Green Chemical Engineering》 EI CSCD 2024年第2期257-265,共9页
Waste plastics are serious environmental threats due to their low degradability and low recycling rate.Rapid and efficient waste plastics recycling technologies are urgently demanded for a sustainable future.Herein,we... Waste plastics are serious environmental threats due to their low degradability and low recycling rate.Rapid and efficient waste plastics recycling technologies are urgently demanded for a sustainable future.Herein,we report a rapid,closed-loop,and streamlined process to convert polyesters such as poly(ethylene terephthalate)(PET)back to its purified monomers.Using trifluoromethanesulfonic acid or metal triflates as the recyclable catalyst,polyesters such as PET can be completely depolymerized by simple carboxylic acids within 1 h.By coupling this acidolysis with a subsequent hydrogenolysis process,the consumed carboxylic acid was recovered and the closed-loop of PET depolymerization could be established.All catalysts and depolymerization agents are fully recycled while only PET and hydrogen are consumed. 展开更多
关键词 Chemical recycling Waste polyester plastics ACIDOLYSIS Recyclable catalyst
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Recycled polymer:Green roads for polyester plastics
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作者 Rulin Yang Guangqiang Xu +2 位作者 Wenjie Tao Qinggang Wang Yong Tang 《Green Carbon》 2024年第1期1-11,共11页
Plastics are integral to numerous significant social advancements.Nonetheless,their contribution to environmental pollution and climate crises cannot be disregarded,as their negative impact on the environment increase... Plastics are integral to numerous significant social advancements.Nonetheless,their contribution to environmental pollution and climate crises cannot be disregarded,as their negative impact on the environment increases with incremental production capacity and demand.Concerted global action is urgently required to promote the green recycle of plastics to prevent their accumulation in the environment and mitigate carbon emissions.This review aims to reveal the paths of green development for polyester plastics,incorporating the trends of the green revolution in mature commercial polyester plastics,newly emerging biodegradable polyester plastics,and future polyester plastics.A critical discussion was conducted on the current and potential future research areas from multiple perspectives,including raw materials,processes,and recycling,to propel us into a future marked by sustainability. 展开更多
关键词 Recycled polymer polyester plastics RECYCLING Bio-based Plastic economy
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