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Relevant bibliographies by topics / Chemical upcycling of polyethylene

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Journal articles

Academic literature on the topic 'Chemical upcycling of polyethylene'

Author: Grafiati

Published: 25 May 2024

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Journal articles on the topic "Chemical upcycling of polyethylene"

1

Xu, Zhen, Nuwayo Eric Munyaneza, Qikun Zhang, et al. "Chemical upcycling of polyethylene, polypropylene, and mixtures to high-value surfactants." Science 381, no. 6658 (2023): 666–71. http://dx.doi.org/10.1126/science.adh0993.

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Conversion of plastic wastes to fatty acids is an attractive means to supplement the sourcing of these high-value, high-volume chemicals. We report a method for transforming polyethylene (PE) and polypropylene (PP) at ~80% conversion to fatty acids with number-average molar masses of up to ~700 and 670 daltons, respectively. The process is applicable to municipal PE and PP wastes and their mixtures. Temperature-gradient thermolysis is the key to controllably degrading PE and PP into waxes and inhibiting the production of small molecules. The waxes are upcycled to fatty acids by oxidation over

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2

Yang, Weina. "Chemical upcycling of PET: a mini-review of converting PET into value-added molecules." Applied and Computational Engineering 7, no. 1 (2023): 246–50. http://dx.doi.org/10.54254/2755-2721/7/20230462.

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With the increasing consumption of single-use plastics, a large number of petrochemical resources are used as raw materials, and hundreds of thousands of tons of plastic waste are produced every year. Although there are lots of methods that have been developed to solve this issue by recycling plastic waste, none of them can recover the value of the waste in an efficient way that is less economical cost and less harmful to the environment. Polyethylene terephthalate (PET) is one of the most widely produced single-use polymers. It is challenging to recover the value through mechanical recycling

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3

Zeng, Manhao, Yu-Hsuan Lee, Garrett Strong та ін. "Chemical Upcycling of Polyethylene to Value-Added α,ω-Divinyl-Functionalized Oligomers". ACS Sustainable Chemistry & Engineering 9, № 41 (2021): 13926–36. http://dx.doi.org/10.1021/acssuschemeng.1c05272.

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4

Zhang, Fan, Manhao Zeng, Ryan D. Yappert, et al. "Polyethylene upcycling to long-chain alkylaromatics by tandem hydrogenolysis/aromatization." Science 370, no. 6515 (2020): 437–41. http://dx.doi.org/10.1126/science.abc5441.

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The current scale of plastics production and the accompanying waste disposal problems represent a largely untapped opportunity for chemical upcycling. Tandem catalytic conversion by platinum supported on γ-alumina converts various polyethylene grades in high yields (up to 80 weight percent) to low-molecular-weight liquid/wax products, in the absence of added solvent or molecular hydrogen, with little production of light gases. The major components are valuable long-chain alkylaromatics and alkylnaphthenes (average ~C30, dispersity Ð = 1.1). Coupling exothermic hydrogenolysis with endothermic a

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5

Aumnate, Chuanchom, Natalie Rudolph, and Majid Sarmadi. "Recycling of Polypropylene/Polyethylene Blends: Effect of Chain Structure on the Crystallization Behaviors." Polymers 11, no. 9 (2019): 1456. http://dx.doi.org/10.3390/polym11091456.

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The combination of high-density polyethylene (HDPE), low-density polyethylene (LDPE) and polypropylene (PP) is frequently found in polymer waste streams. Because of their similar density, they cannot be easily separated from each other in the recycling stream. Blending of PP/ polyethylenes (PEs) in different ratios possibly eliminate the sorting process used in the regular recycling process. PP has fascinating properties such as excellent processability and chemical resistance. However, insufficient flexibility limits its use for specific applications. Blending of PP with relative flexible PEs

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6

Zhang, Xiaoxia, Shaodan Xu, Junhong Tang, Li Fu, and Hassan Karimi-Maleh. "Sustainably Recycling and Upcycling of Single-Use Plastic Wastes through Heterogeneous Catalysis." Catalysts 12, no. 8 (2022): 818. http://dx.doi.org/10.3390/catal12080818.

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The huge amount of plastic waste has caused a series of environmental and economic problems. Depolymerization of these wastes and their conversion into desired chemicals have been regarded as a promising route for dealing with these issues, which strongly relies on catalysis for C-C and C-O bond cleavage and selective transformation. Here, we reviewed recent developments in catalysis systems for dealing with single-use plastics, such as polyethylene, polypropylene, and polyethylene glycol terephthalate. The recycling processes of depolymerization into original monomers and conversion into othe

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7

Haque, Zenifar G., Jessica Ortega Ramos, and Gerardine G. Botte. "(General Student Poster Award Winner - 2nd Place) Electrochemical Routes for Polymer Upcycling." ECS Meeting Abstracts MA2023-01, no. 55 (2023): 2682. http://dx.doi.org/10.1149/ma2023-01552682mtgabs.

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Approximately 380 million tons of plastic are produced annually, and it is projected to rise to nearly 1.1 billion by 2050 [1]. The largest fraction of such waste consists of polyethylene (PE) and polypropylene (PP), which commonly require energy-intensive methods to achieve depolymerization (such as pyrolysis and hydrogenolysis) due to their remarkable thermodynamic stability. Electrochemical methods are a promising alternative for polymer upcycling as they can utilize renewable energy to create an external potential, overcoming the thermodynamic constraints that the C-C bond cleavage endothe

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8

Alali, Sabah A. S., Meshal K. M. B. J. Aldaihani, and Khaled M. Alanezi. "Plant Design for the Conversion of Plastic Waste into Valuable Chemicals (Alkyl Aromatics)." Applied Sciences 13, no. 16 (2023): 9221. http://dx.doi.org/10.3390/app13169221.

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The exponential increase in production and consumption of plastic has led to accumulation of plastic waste in the environment, resulting in detrimental impacts on human health and the natural environment. Plastic pollution not only stems from discarded plastics but also from the chemicals released during plastic production and decomposition. Various waste management strategies exist for plastic waste, including landfilling, recycling, conversion to liquid fuel, and upcycling. Landfilling, which is a prevalent method, contributes to long-term environmental degradation. Recycling is practiced wo

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9

Otaibi, Ahmed A. Al, Abdulmohsen Khalaf Dhahi Alsukaibi, Md Ataur Rahman, Md Mushtaque, and Ashanul Haque. "From Waste to Schiff Base: Upcycling of Aminolysed Poly(ethylene terephthalate) Product." Polymers 14, no. 9 (2022): 1861. http://dx.doi.org/10.3390/polym14091861.

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Recycling plastic waste into valuable materials is one of the contemporary challenges. Every year around 50 million tons of polyethylene terephthalate (PET) bottles are used worldwide. The fact that only a part of this amount is being recycled is putting a burden on the environment. Therefore, a technology that can convert PET-based waste materials into useful ones is highly needed. In the present work, attempts have been made to convert PET-based waste materials into a precursor for others. We report an aminolysed product (3) obtained by aminolysis reaction of PET (1) with 1,2 diaminopropane

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10

Soong, Ya-Hue Valerie, Margaret J. Sobkowicz, and Dongming Xie. "Recent Advances in Biological Recycling of Polyethylene Terephthalate (PET) Plastic Wastes." Bioengineering 9, no. 3 (2022): 98. http://dx.doi.org/10.3390/bioengineering9030098.

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Polyethylene terephthalate (PET) is one of the most commonly used polyester plastics worldwide but is extremely difficult to be hydrolyzed in a natural environment. PET plastic is an inexpensive, lightweight, and durable material, which can readily be molded into an assortment of products that are used in a broad range of applications. Most PET is used for single-use packaging materials, such as disposable consumer items and packaging. Although PET plastics are a valuable resource in many aspects, the proliferation of plastic products in the last several decades have resulted in a negative env

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