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Artículos de revistas sobre el tema "Chemical upcycling of polyethylene"

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Publicado: 25 de mayo de 2024

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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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11

Szabó, Veronika Anna, and Gábor Dogossy. "Investigation of Flame Retardant rPET Foam." Periodica Polytechnica Mechanical Engineering 64, no. 1 (2019): 81–87. http://dx.doi.org/10.3311/ppme.14556.

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The use of plastics in the food and the packaging industries continuously is increasing. In these areas of use the product’s life cycle is short, therefore it quickly turns into waste. The polyethylene terephthalate (PET) - the material that is used as beverage containers - are the material with the greatest environmental load. The physical recycling of PET bottles in large quantities was the research goal. During the work with the help of chemical foaming a closed cell structural foam from PET bottle was produced. The research was carried out with upcycling using chain extender and impact mod
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12

Cho, Hyungjin, Ahyeon Jin, Sun Ju Kim, et al. "Conversion of Polyethylene to Low-Molecular-Weight Oil Products at Moderate Temperatures Using Nickel/Zeolite Nanocatalysts." Materials 17, no. 8 (2024): 1863. http://dx.doi.org/10.3390/ma17081863.

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Polyethylene (PE) is the most widely used plastic, known for its high mechanical strength and affordability, rendering it responsible for ~70% of packaging waste and contributing to microplastic pollution. The cleavage of the carbon chain can induce the conversion of PE wastes into low-molecular-weight hydrocarbons, such as petroleum oils, waxes, and natural gases, but the thermal degradation of PE is challenging and requires high temperatures exceeding 400 °C due to its lack of specific chemical groups. Herein, we prepare metal/zeolite nanocatalysts by incorporating small-sized nickel nanopar
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13

Bustos Seibert, Maximilian, Gerardo Andres Mazzei Capote, Maximilian Gruber, Wolfram Volk, and Tim A. Osswald. "Manufacturing of a PET Filament from Recycled Material for Material Extrusion (MEX)." Recycling 7, no. 5 (2022): 69. http://dx.doi.org/10.3390/recycling7050069.

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Due to its low cost and easy use, the use of material extrusion (MEX) as an additive manufacturing (AM) technology has increased rapidly in recent years. However, this process mainly involves the processing of new plastics. Combining the MEX process with polyethylene terephthalate (PET), which offers a high potential for mechanical and chemical recyclability, opens up a broad spectrum of reutilization possibilities. Turning used PET bottles into printable filament for MEX is not only a recycling option, but also an attractive upcycling scenario that can lead to the production of complex, funct
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14

Jiang, Changle, Yuxin Wang, Thang Luong, Brandon Robinson, Wei Liu, and Jianli Hu. "Low temperature upcycling of polyethylene to gasoline range chemicals: Hydrogen transfer and heat compensation to endothermic pyrolysis reaction over zeolites." Journal of Environmental Chemical Engineering 10, no. 3 (2022): 107492. http://dx.doi.org/10.1016/j.jece.2022.107492.

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15

Feng, Xue, Lijun Yang, and Lei Zhang. "Sustainable solar-and electro-driven production of high concentration H2O2 coupled to electrocatalytic upcycling of polyethylene terephthalate plastic waste." Chemical Engineering Journal 482 (February 2024): 149191. http://dx.doi.org/10.1016/j.cej.2024.149191.

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16

Lee, Nahyeon, Junghee Joo, Kun-Yi Andrew Lin, and Jechan Lee. "Waste-to-Fuels: Pyrolysis of Low-Density Polyethylene Waste in the Presence of H-ZSM-11." Polymers 13, no. 8 (2021): 1198. http://dx.doi.org/10.3390/polym13081198.

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Herein, the pyrolysis of low-density polyethylene (LDPE) scrap in the presence of a H-ZSM-11 zeolite was conducted as an effort to valorize plastic waste to fuel-range chemicals. The LDPE-derived pyrolytic gas was composed of low-molecular-weight aliphatic hydrocarbons (e.g., methane, ethane, propane, ethylene, and propylene) and hydrogen. An increase in pyrolysis temperature led to increasing the gaseous hydrocarbon yields for the pyrolysis of LDPE. Using the H-ZSM-11 catalyst in the pyrolysis of LDPE greatly enhanced the content of propylene in the pyrolytic gas because of promoted dehydroge
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17

Leigh Krietsch Boerner. "Upcycling polyethylene." C&EN Global Enterprise 98, no. 41 (2020): 7. http://dx.doi.org/10.1021/cen-09841-scicon7.

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18

Tiso, Till, Tanja Narancic, Ren Wei, et al. "Towards bio-upcycling of polyethylene terephthalate." Metabolic Engineering 66 (July 2021): 167–78. http://dx.doi.org/10.1016/j.ymben.2021.03.011.

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19

Stadler, Bernhard M., and Johannes G. de Vries. "Chemical upcycling ofpolymers." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 379, no. 2209 (2021): 20200341. http://dx.doi.org/10.1098/rsta.2020.0341.

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As the production volume of polymers increases, so does the amount of plastic waste. Plastic recycling is one of the concepts to address in this issue. Unfortunately, only a small fraction of plastic waste is recycled. Even with the development of polymers for closed loop recycling that can be in theory reprocessed infinitely the inherent dilemma is that because of collection, cleaning and separation processes the obtained materials simply are not cost competitive with virgin materials. Chemical upcycling, the conversion of polymers to higher valuable products, either polymeric or monomeric, c
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20

Kamleitner, F., B. Duscher, T. Koch, S. Knaus, and V. M. Archodoulaki. "Upcycling of polypropylene-the influence of polyethylene impurities." Polymer Engineering & Science 57, no. 12 (2017): 1374–81. http://dx.doi.org/10.1002/pen.24522.

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21

Celik, Gokhan, Robert M. Kennedy, Ryan A. Hackler, et al. "Upcycling Single-Use Polyethylene into High-Quality Liquid Products." ACS Central Science 5, no. 11 (2019): 1795–803. http://dx.doi.org/10.1021/acscentsci.9b00722.

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22

Guironnet, Damien, and Baron Peters. "Tandem Catalysts for Polyethylene Upcycling: A Simple Kinetic Model." Journal of Physical Chemistry A 124, no. 19 (2020): 3935–42. http://dx.doi.org/10.1021/acs.jpca.0c01363.

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23

KASHIWAGI, Hirotaka, Hiroki KAKIUCHI, and Eiji SHIRAI. "UPCYCLING OF WASTE POLYETHYLENE TEREPHTHALATE (PET) INTO ASPHALT MODIFIER." Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering) 78, no. 2 (2023): I_31—I_40. http://dx.doi.org/10.2208/jscejpe.78.2_i_31.

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24

Yuan, Xiangzhou, Nallapaneni Manoj Kumar, Boris Brigljević, et al. "Sustainability-inspired upcycling of waste polyethylene terephthalate plastic into porous carbon for CO2 capture." Green Chemistry 24, no. 4 (2022): 1494–504. http://dx.doi.org/10.1039/d1gc03600a.

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Industrial-scale upcycling of waste polyethylene terephthalate (PET) plastic into porous carbon globally for CO2 capture was verified as a multifunctional alternative to conventional CO2 absorption and plastic waste management technologies.
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25

Liu, Pan, Yi Zheng, Yingbo Yuan, et al. "Valorization of Polyethylene Terephthalate to Muconic Acid by Engineering Pseudomonas Putida." International Journal of Molecular Sciences 23, no. 19 (2022): 10997. http://dx.doi.org/10.3390/ijms231910997.

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Plastic waste is rapidly accumulating in the environment and becoming a huge global challenge. Many studies have highlighted the role of microbial metabolic engineering for the valorization of polyethylene terephthalate (PET) waste. In this study, we proposed a new conceptual scheme for upcycling of PET. We constructed a multifunctional Pseudomonas putida KT2440 to simultaneously secrete PET hydrolase LCC, a leaf-branch compost cutinase, and synthesize muconic acid (MA) using the PET hydrolysate. The final product MA and extracellular LCC can be separated from the supernatant of the culture by
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26

Tennakoon, Akalanka, Xun Wu, Alexander L. Paterson, et al. "Catalytic upcycling of high-density polyethylene via a processive mechanism." Nature Catalysis 3, no. 11 (2020): 893–901. http://dx.doi.org/10.1038/s41929-020-00519-4.

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27

Qiu, Jianfan, Songqi Ma, Sheng Wang, et al. "Upcycling of Polyethylene Terephthalate to Continuously Reprocessable Vitrimers through Reactive Extrusion." Macromolecules 54, no. 2 (2021): 703–12. http://dx.doi.org/10.1021/acs.macromol.0c02359.

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28

Wang, Tianlin, Chuanchao Shen, Guangren Yu, and Xiaochun Chen. "The upcycling of polyethylene terephthalate using protic ionic liquids as catalyst." Polymer Degradation and Stability 203 (September 2022): 110050. http://dx.doi.org/10.1016/j.polymdegradstab.2022.110050.

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29

Lee, Yu-Hsuan, Jiakai Sun, Susannah L. Scott, and Mahdi M. Abu-Omar. "Quantitative analyses of products and rates in polyethylene depolymerization and upcycling." STAR Protocols 4, no. 4 (2023): 102575. http://dx.doi.org/10.1016/j.xpro.2023.102575.

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30

Amalia, Lita, Chia-Yu Chang, Steven S.-S. Wang, Yi-Chun Yeh, and Shen-Long Tsai. "Recent advances in the biological depolymerization and upcycling of polyethylene terephthalate." Current Opinion in Biotechnology 85 (February 2024): 103053. http://dx.doi.org/10.1016/j.copbio.2023.103053.

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31

Nulwala, Hunaid, Carlos Diaz, Ken Medlin, and Zhijie Yan. "Compatibilization of Recycled Polypropylene with Polyethylene Blends Via Ionic Liquid to Enhance Mechanical Properties." ECS Meeting Abstracts MA2022-02, no. 55 (2022): 2094. http://dx.doi.org/10.1149/ma2022-02552094mtgabs.

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Polypropylene (PP) is the world's second-largest plastic resin based on production volume, after polyethylene (PE). In 2021, the global production volume of PP amounted to 80 million tons. Less than 2% of total produced PP is recycled annually. PP is sensitive to mixed polymers, and a minor amount of other polymeric contaminants reduces physical properties (Figure 1). To increase the recyclability of PP, there is a specific need to have additives that upcycle. PP represents the most significant opportunity in increasing recycling rates. Ionic liquids (ILs) are universal solvents and can promot
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32

Villagómez-Salas, Saúl, Palanisamy Manikandan, Salvador Francisco Acuña Guzmán, and Vilas G. Pol. "Amorphous Carbon Chips Li-Ion Battery Anodes Produced through Polyethylene Waste Upcycling." ACS Omega 3, no. 12 (2018): 17520–27. http://dx.doi.org/10.1021/acsomega.8b02290.

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33

Lou, Xiangxi, Xuan Gao, Yu Liu, et al. "Highly efficient photothermal catalytic upcycling of polyethylene terephthalate via boosted localized heating." Chinese Journal of Catalysis 49 (June 2023): 113–22. http://dx.doi.org/10.1016/s1872-2067(23)64435-3.

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34

Kim, Jeung Gon. "Chemical recycling of poly(bisphenol A carbonate)." Polymer Chemistry 11, no. 30 (2020): 4830–49. http://dx.doi.org/10.1039/c9py01927h.

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35

Korley, LaShanda T. J., Thomas H. Epps, Brett A. Helms, and Anthony J. Ryan. "Toward polymer upcycling—adding value and tackling circularity." Science 373, no. 6550 (2021): 66–69. http://dx.doi.org/10.1126/science.abg4503.

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Plastics have revolutionized modern life, but have created a global waste crisis driven by our reliance and demand for low-cost, disposable materials. New approaches are vital to address challenges related to plastics waste heterogeneity, along with the property reductions induced by mechanical recycling. Chemical recycling and upcycling of polymers may enable circularity through separation strategies, chemistries that promote closed-loop recycling inherent to macromolecular design, and transformative processes that shift the life-cycle landscape. Polymer upcycling schemes may enable lower-ene
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36

Wang, Kaili, Fan Yuan, and Lei Huang. "Recent Progresses and Challenges in Upcycling of Plastics through Selective Catalytic Oxidation." ChemPlusChem, February 26, 2024. http://dx.doi.org/10.1002/cplu.202300701.

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Chemical upcycling of plastics provides an important direction for solving the challenging issues of plastic pollution and mitigating the wastage of carbon resources. Among them, catalytic oxidative cracking of plastics to produce high‐value chemicals, such as catalytic oxidation of polyethylene (PE) to produce fatty dicarboxylic acids, catalytic oxidation of polystyrene (PS) to produce benzoic acid, and catalytic oxidation of polyethylene terephthalate (PET) to produce terephthalic acid under mild conditions has attracted increasing attention, and some exciting progress has been made recently
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37

Kogolev, Dmitry, Oleg Semyonov, Nadezhda Metalnikova, et al. "Waste PET Upcycling to Conductive Carbon-Based Composite through Laser-Assisted Carbonization of UiO-66." Journal of Materials Chemistry A, 2023. http://dx.doi.org/10.1039/d2ta08127j.

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The upcycling of waste polymers into novel materials with high added value is a vital task for modern chemical engineering. Here, we propose diversifying waste polyethylene terephthalate (PET) upcycling to...
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38

Kang, Qingyun, Mingyu Chu, Panpan Xu, et al. "Entropy Confinement Promotes Hydrogenolysis Activity for Polyethylene Upcycling." Angewandte Chemie International Edition, October 6, 2023. http://dx.doi.org/10.1002/anie.202313174.

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Chemical upcycling that catalyzes waste plastics back to high‐purity chemicals holds great promise in end‐of‐life plastics valorization. One of the main challenges in this process is the thermodynamic limitations imposed by the high intrinsic entropy of polymer chains, which makes their adsorption on catalysts unfavorable and the transition state unstable. Here, we overcome this challenge by inducing the catalytic reaction inside mesoporous channels, which possess a strong confined ability to polymer chains, allowing for stabilizing transition state. This approach involves the synthesis of p‐R
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39

Kang, Qingyun, Mingyu Chu, Panpan Xu, et al. "Entropy Confinement Promotes Hydrogenolysis Activity for Polyethylene Upcycling." Angewandte Chemie, October 6, 2023. http://dx.doi.org/10.1002/ange.202313174.

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Chemical upcycling that catalyzes waste plastics back to high‐purity chemicals holds great promise in end‐of‐life plastics valorization. One of the main challenges in this process is the thermodynamic limitations imposed by the high intrinsic entropy of polymer chains, which makes their adsorption on catalysts unfavorable and the transition state unstable. Here, we overcome this challenge by inducing the catalytic reaction inside mesoporous channels, which possess a strong confined ability to polymer chains, allowing for stabilizing transition state. This approach involves the synthesis of p‐R
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40

Peng, Yuantao, Jie Yang, Chenqiang Deng, Jin Deng, Li Shen, and Yao Fu. "Acetolysis of waste polyethylene terephthalate for upcycling and life-cycle assessment study." Nature Communications 14, no. 1 (2023). http://dx.doi.org/10.1038/s41467-023-38998-1.

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AbstractTo reduce environmental pollution and reliance on fossil resources, polyethylene terephthalate as the most consumed synthetic polyester needs to be recycled effectively. However, the existing recycling methods cannot process colored or blended polyethylene terephthalate materials for upcycling. Here we report a new efficient method for acetolysis of waste polyethylene terephthalate into terephthalic acid and ethylene glycol diacetate in acetic acid. Since acetic acid can dissolve or decompose other components such as dyes, additives, blends, etc., Terephthalic acid can be crystallized
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41

Chen, Ziqiu, Emmanuel Ejiogu, and Baron Peters. "Quantifying synergy for mixed end-scission and random-scission catalysts in polymer upcycling." Reaction Chemistry & Engineering, 2023. http://dx.doi.org/10.1039/d3re00390f.

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Abstract: The environmental consequences of plastic waste are driving research into many chemical and catalytic recycling strategies. The isomerizing ethenolysis strategy for polyethylene upcycling combines three catalysts to affect two...
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42

Duan, Jindi, Hai Wang, Hangjie Li, et al. "Selective conversion of polyethylene wastes to methylated aromatics through cascade catalysis." EES Catalysis, 2023. http://dx.doi.org/10.1039/d3ey00011g.

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Upcycling polyethylene into aromatics has attracted much attention for converting plastic wastes into valuable chemicals, but the general routes strongly depend on harsh conditions, precious metals, and/or wide product distributions....
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43

Klauer, Ross R., D. Alex Hansen, Derek Wu, Lummy Maria Oliveira Monteiro, Kevin V. Solomon, and Mark A. Blenner. "Biological Upcycling of Plastics Waste." Annual Review of Chemical and Biomolecular Engineering, April 15, 2024. http://dx.doi.org/10.1146/annurev-chembioeng-100522-115850.

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Plastic wastes accumulate in the environment, impacting wildlife and human health and representing a significant pool of inexpensive waste carbon that could form feedstock for the sustainable production of commodity chemicals, monomers, and specialty chemicals. Current mechanical recycling technologies are not economically attractive due to the lower-quality plastics that are produced in each iteration. Thus, the development of a plastics economy requires a solution that can deconstruct plastics and generate value from the deconstruction products. Biological systems can provide such value by a
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44

Osei, Dacosta, Lakshmiprasad Gurrala, Aria Sheldon, et al. "Subcritical CO2–H2O hydrolysis of polyethylene terephthalate as a sustainable chemical recycling platform." Green Chemistry, 2024. http://dx.doi.org/10.1039/d3gc04576e.

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45

Obando, Alejandro Guillen, Mark Robertson, Chinwendu Umeojiako, et al. "Catalyst-free upcycling of crosslinked polyethylene foams for CO2 capture." Journal of Materials Research, May 1, 2023. http://dx.doi.org/10.1557/s43578-023-01016-7.

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AbstractRecycling of crosslinked plastics is an intractable challenge due to their very limited amenability to mechanical reprocessing. While a variety of chemical recycling methods have been recently reported, these systems primarily focus on deconstructing or depolymerizing plastics to monomers and liquid fuels, which their subsequent use likely involves additional energy consumption and greenhouse gas emission. In this work, we present a simple, scalable, and catalyst-free method for directly converting crosslinked polyethylene (PE) foams into porous carbon materials. This process is enable
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46

Zhou, Hua, Yue Ren, Zhenhua Li, et al. "Electrocatalytic upcycling of polyethylene terephthalate to commodity chemicals and H2 fuel." Nature Communications 12, no. 1 (2021). http://dx.doi.org/10.1038/s41467-021-25048-x.

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AbstractPlastic wastes represent a largely untapped resource for manufacturing chemicals and fuels, particularly considering their environmental and biological threats. Here we report electrocatalytic upcycling of polyethylene terephthalate (PET) plastic to valuable commodity chemicals (potassium diformate and terephthalic acid) and H2 fuel. Preliminary techno-economic analysis suggests the profitability of this process when the ethylene glycol (EG) component of PET is selectively electrooxidized to formate (>80% selectivity) at high current density (>100 mA cm−2). A nickel-modified coba
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47

Li, Rongxiang, Wei Zeng, Runyao Zhao, et al. "TiO2 nanoparticle supported Ru catalyst for chemical upcycling of polyethylene terephthalate to alkanes." Nano Research, June 10, 2023. http://dx.doi.org/10.1007/s12274-023-5772-1.

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48

Chen, Zhijie, Renji Zheng, Teng Bao, et al. "Dual-Doped Nickel Sulfide for Electro-Upgrading Polyethylene Terephthalate into Valuable Chemicals and Hydrogen Fuel." Nano-Micro Letters 15, no. 1 (2023). http://dx.doi.org/10.1007/s40820-023-01181-8.

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Abstract Electro-upcycling of plastic waste into value-added chemicals/fuels is an attractive and sustainable way for plastic waste management. Recently, electrocatalytically converting polyethylene terephthalate (PET) into formate and hydrogen has aroused great interest, while developing low-cost catalysts with high efficiency and selectivity for the central ethylene glycol (PET monomer) oxidation reaction (EGOR) remains a challenge. Herein, a high-performance nickel sulfide catalyst for plastic waste electro-upcycling is designed by a cobalt and chloride co-doping strategy. Benefiting from t
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49

Sun, Jiakai, Yu-Hsuan Lee, Ryan D. Yappert, et al. "Bifunctional tandem catalytic upcycling of polyethylene to surfactant-range alkylaromatics." Chem, June 2023. http://dx.doi.org/10.1016/j.chempr.2023.05.017.

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Dissanayake, Lakshika, and Lahiru N. Jayakody. "Engineering Microbes to Bio-Upcycle Polyethylene Terephthalate." Frontiers in Bioengineering and Biotechnology 9 (May 28, 2021). http://dx.doi.org/10.3389/fbioe.2021.656465.

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Polyethylene terephthalate (PET) is globally the largest produced aromatic polyester with an annual production exceeding 50 million metric tons. PET can be mechanically and chemically recycled; however, the extra costs in chemical recycling are not justified when converting PET back to the original polymer, which leads to less than 30% of PET produced annually to be recycled. Hence, waste PET massively contributes to plastic pollution and damaging the terrestrial and aquatic ecosystems. The global energy and environmental concerns with PET highlight a clear need for technologies in PET “upcycl
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