Upcycling of waste polyethylene terephthalate plastic bottles into porous carbon for CF4 adsorption

Yuan, Xiangzhou; Cho, Moon Kyung; Lee, Jong Gyu; Choi, Seung Wan; Lee, Ki Bong

doi:10.1016/j.envpol.2020.114868

Cited by 69 publications

(33 citation statements)

References 39 publications

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“…The porous carbon thus obtained can be used for carbon tetrafluoride (CF 4 ) adsorption to prevent global warming (Scheme 4b). [142] PET can be recycled by means of different chemicals, and one of the reasons is the presence of ester groups that can be readily cleaved. Terephthalamides can be obtained by aminolysis technique, dimethyl terephthalate and ethylene glycol are produced by methanolysis, polyols are generated via glycolysis method, and terephthalic acid and ethylene glycol can be recovered from the hydrolysis method.…”

Section: Polyethylene Terephthalatementioning

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: Polyethylene Terephthalatementioning

confidence: 99%

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

et al. 2021

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“…Yuan et al conducted the sequential thermal pyrolysis-base activation process under inert atmosphere to convert waste PET bottles into porous carbons, of which the specific surface area and the micropores could be regulated by the pyrolysis temperature and base/carbon ratio. [90] The porous carbons were utilized as selective and effective materials for CF 4 greenhouse gas absorption at ambient conditions. Likewise, Zhang et al first pyrolyzed the PET bottles at 700°C, and then the pyrolytic carbon was mixed with KOH and heated under N 2 at 700°C for 1 h. [91] Hierarchical porous carbons were obtained through the tandem pyrolysis and base activation, with ample surface functional groups and a large specific surface area of 2683 m 2 g À 1 .…”

Section: Production Of Functional Carbon Materials By the Pyrolysis Of Waste Plasticsmentioning

confidence: 99%

Recent Progress in the Chemical Upcycling of Plastic Wastes

2021

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The massive generation of plastic wastes without satisfactory treatment has induced severe environmental problems and gained increasing attentions. In this Minireview, recent progresses in the chemical upcycling of plastic wastes by using various methods (mainly in the past three to five years) is summarized. The chemical upcycling of plastic wastes points out a "plastic-based refinery" concept, which is to use the plastic wastes as platform feedstocks to produce highly valuable monomeric or oligomeric compounds, putting the plastic wastes back into a circular economy. The different chemical methods to upcycle plastic wastes, including hydrogenolysis, photocatalysis, pyrolysis, solvolysis, and others, are introduced in each section to valorize diverse plastic feedstocks into value-added chemicals, materials, or fuels. In addition, other emerging technologies as well as the new generation of plastic thermosets are covered.

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“…• PET can be upcycled to porous carbon, which can be used to absorb tetrafluoromethane (CF4) (Yuan et al 2020). • PET can be upcycled into carbon dots (C-dots), which can be used as a material for sensors (Aji et al 2018).…”

Section: Upcycling Plasticmentioning

confidence: 99%

Plastic Recycling of Polyethylene Terephthalate (PET) and Polyhydroxybutyrate (PHB)—a Comprehensive Review

et al. 2021

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As an integral part of plastic waste, large amounts of polyethylene terephthalate (PET), polyhydroxybutyrate (PHB), and solid waste have led to serious environmental problems. In order to identify critical barriers to the reuse of plastic across a wide range of plastic values all over the world, we need to go through PET and PHB in terms of volume. This is a significant factor for the world and our global warming. The current uses of plastic through PET and PHB are significant. Through the recycling process of PET and PHB, the total volume of plastic uses will be decreased and reuse rate will be high by economic, social, and environmental factors. Key areas are identified by low demand due to price considerations, insufficient tracking and transparency of pricing transactions, and lack of common design. Integration of value chains is considered to be the most important intervention for respondents, following the need for increased investment and technology development. Recycling helps the environment and creates new economic opportunities. Reuse of plastics encourages businesses to develop new and innovative products. Recycling reduces through extraction (mining, quarrying, and logging), refining, and processing of raw materials which create significant air and water pollution. As renewable energy saving also reduces greenhouse gas emissions, which help to cope with climate change. This paper aims to raise awareness that increase the demand of recycling process of PET and PHB and to identify critical barriers of recycling throughout a series of plastic prices with the volume.

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Upcycling of waste polyethylene terephthalate plastic bottles into porous carbon for CF4 adsorption

Cited by 69 publications

References 39 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

Recent Progress in the Chemical Upcycling of Plastic Wastes

Plastic Recycling of Polyethylene Terephthalate (PET) and Polyhydroxybutyrate (PHB)—a Comprehensive Review

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