1
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Zhang R, Zheng X, Cheng X, Xu J, Li Y, Zhou Q, Xin J, Yan D, Lu X. Degradation of Poly(ethylene terephthalate) Catalyzed by Nonmetallic Dibasic Ionic Liquids under UV Radiation. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1583. [PMID: 38612097 PMCID: PMC11012343 DOI: 10.3390/ma17071583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 03/22/2024] [Accepted: 03/26/2024] [Indexed: 04/14/2024]
Abstract
Nonmetallic ionic liquids (ILs) exhibit unique advantages in catalyzing poly (ethylene terephthalate) (PET) glycolysis, but usually require longer reaction times. We found that exposure to UV radiation can accelerate the glycolysis reaction and significantly reduce the reaction time. In this work, we synthesized five nonmetallic dibasic ILs, and their glycolysis catalytic activity was investigated. 1,8-diazabicyclo [5,4,0] undec-7-ene imidazole ([HDBU]Im) exhibited better catalytic performance. Meanwhile, UV radiation is used as a reinforcement method to improve the PET glycolysis efficiency. Under optimal conditions (5 g PET, 20 g ethylene glycol (EG), 0.25 g [HDBU]Im, 10,000 µW·cm-2 UV radiation reacted for 90 min at 185 °C), the PET conversion and BHET yield were 100% and 88.9%, respectively. Based on the UV-visible spectrum, it was found that UV radiation can activate the C=O in PET. Hence, the incorporation of UV radiation can considerably diminish the activation energy of the reaction, shortening the reaction time of PET degradation. Finally, a possible reaction mechanism of [HDBU]Im-catalyzed PET glycolysis under UV radiation was proposed.
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Affiliation(s)
- Ruiqi Zhang
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; (R.Z.); (J.X.)
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xu Zheng
- College of Chemistry, Liaoning University, Shenyang 110036, China
| | - Xiujie Cheng
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; (R.Z.); (J.X.)
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Junli Xu
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; (R.Z.); (J.X.)
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yi Li
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; (R.Z.); (J.X.)
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qing Zhou
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; (R.Z.); (J.X.)
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiayu Xin
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; (R.Z.); (J.X.)
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dongxia Yan
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; (R.Z.); (J.X.)
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xingmei Lu
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; (R.Z.); (J.X.)
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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2
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Clark R, Shaver MP. Depolymerization within a Circular Plastics System. Chem Rev 2024; 124:2617-2650. [PMID: 38386877 PMCID: PMC10941197 DOI: 10.1021/acs.chemrev.3c00739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 01/18/2024] [Accepted: 02/08/2024] [Indexed: 02/24/2024]
Abstract
The societal importance of plastics contrasts with the carelessness with which they are disposed. Their superlative properties lead to economic and environmental efficiency, but the linearity of plastics puts the climate, human health, and global ecosystems at risk. Recycling is fundamental to transitioning this linear model into a more sustainable, circular economy. Among recycling technologies, chemical depolymerization offers a route to virgin quality recycled plastics, especially when valorizing complex waste streams poorly served by mechanical methods. However, chemical depolymerization exists in a complex and interlinked system of end-of-life fates, with the complementarity of each approach key to environmental, economic, and societal sustainability. This review explores the recent progress made into the depolymerization of five commercial polymers: poly(ethylene terephthalate), polycarbonates, polyamides, aliphatic polyesters, and polyurethanes. Attention is paid not only to the catalytic technologies used to enhance depolymerization efficiencies but also to the interrelationship with other recycling technologies and to the systemic constraints imposed by a global economy. Novel polymers, designed for chemical depolymerization, are also concisely reviewed in terms of their underlying chemistry and potential for integration with current plastic systems.
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Affiliation(s)
- Robbie
A. Clark
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, United
Kingdom
- Sustainable
Materials Innovation Hub, Henry Royce Institute, University of Manchester, Manchester M13 9PL, United
Kingdom
| | - Michael P. Shaver
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, United
Kingdom
- Sustainable
Materials Innovation Hub, Henry Royce Institute, University of Manchester, Manchester M13 9PL, United
Kingdom
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3
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Hu Y, Zhang S, Xu J, Liu Y, Yu A, Qian J, Xie Y. Highly Efficient Depolymerization of Waste Polyesters Enabled by Transesterification/Hydrogenation Relay Under Mild Conditions. Angew Chem Int Ed Engl 2023; 62:e202312564. [PMID: 37735146 DOI: 10.1002/anie.202312564] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 09/21/2023] [Accepted: 09/21/2023] [Indexed: 09/23/2023]
Abstract
The efficient depolymerization of polyesters under mild conditions remains a significant challenge. Herein, we demonstrate a highly efficient strategy for the degradation of a diverse array of waste polyesters as low to 80 °C, 1 bar H2 . The key to the success of this transformation relied on the initial transesterification of macromolecular polyester into more degradable oligomeric fragments in the presence of CH3 OH and the subsequent hydrogenation by the use of the rationally designed quinaldine-based Ru complex. Controlled experiments and preliminary mechanistic studies disclosed the quinaldine-based catalysts could be hydrogenated to the eventually active species, which has been confirmed by X-ray diffraction analysis and directly used as a catalyst in the hydrogenolysis of polyester. The strong viability and high activity of this new species in protic solvent were explained in detail. Besides, the crucial role of CH3 OH in promoting reaction efficiency during the whole process was also elucidated. The synthetic utility of this method was further illustrated by preparing 1,4-cyclohexanedimethanol (CHDM) from waste polyethylene terephthalate (PET).
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Affiliation(s)
- Yue Hu
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Shiyun Zhang
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Juanfang Xu
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Yuan Liu
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Aiai Yu
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Jun Qian
- Yuyao DAFA Chemical FIBER Co., Ltd., Ningbo, 315211, P. R. China
| | - Yinjun Xie
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo, 315201, P. R. China
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4
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Xu T, Li Z, Ju X, Tang H, Xiang W. Chemical Degradation of Waste PET and Its Application in Wood Reinforcement and Modification. ACS OMEGA 2023; 8:30550-30562. [PMID: 37636979 PMCID: PMC10448690 DOI: 10.1021/acsomega.3c03805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 07/24/2023] [Indexed: 08/29/2023]
Abstract
In recent years, with the increasing scarcity of fossil resources and the worsening environmental pollution, the effective utilization of wood and plastic waste has become a critical issue. In this paper, propylene glycol (PG) was used as an alcoholysis agent to degrade waste poly(ethylene terephthalate) (PET), and unsaturated polyester (UPR) was synthesized by the polycondensation reaction. The Chinese fir was modified by chemical impregnation to obtain a new type of waste PET-based wood-plastic composites. It exhibits a compressive strength of about 107 MPa and a water absorption of less than 20%. These results highlight the outstanding modification effect on fir, demonstrating excellent mechanical properties and corrosion resistance. This study presents a green and efficient method for the preparation of wood-plastic composites and the recycling of waste PET, providing promising solutions for sustainable resource utilization and environmental protection.
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Affiliation(s)
- Tianle Xu
- Faculty
of Chemical Engineering, Kunming University
of Science and Technology, Kunming 650032, China
| | - Zhibin Li
- Faculty
of Chemical Engineering, Kunming University
of Science and Technology, Kunming 650032, China
| | - Xinran Ju
- Faculty
of Science, University of Sydney, Camperdown 2050, New South Wales, Australia
| | - Hui Tang
- Faculty
of Chemical Engineering, Kunming University
of Science and Technology, Kunming 650032, China
| | - Wenli Xiang
- Faculty
of Chemical Engineering, Kunming University
of Science and Technology, Kunming 650032, China
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5
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Zhang S, Xue Y, Wu Y, Zhang YX, Tan T, Niu Z. PET recycling under mild conditions via substituent-modulated intramolecular hydrolysis. Chem Sci 2023; 14:6558-6563. [PMID: 37350822 PMCID: PMC10283487 DOI: 10.1039/d3sc01161e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 05/24/2023] [Indexed: 06/24/2023] Open
Abstract
Catalytic depolymerization represents a promising approach for the closed-loop recycling of plastic wastes. Here, we report a knowledge-driven catalyst development for poly(ethylene terephthalate) (PET) recycling, which not only achieves more than 23-fold enhancement in specific activity but also reduces the alkali concentration by an order of magnitude compared with the conventional hydrolysis. Substituted binuclear zinc catalysts are developed to regulate biomimetic intramolecular PET hydrolysis. Hammett studies and density functional theory (DFT) calculations indicate that the substituents modify the charge densities of the active centers, and an optimal substituent should slightly increase the electron richness of the zinc sites to facilitate the formation of a six-membered ring intermediate. The understanding of the structure-activity relationship leads to an advanced catalyst with a specific activity of 778 ± 40 gPET h-1 gcatal-1 in 0.1 M NaOH, far outcompeting the conventional hydrolysis using caustic bases (<33.3 gPET h-1 gcatal-1 in 1-5 M NaOH). This work opens new avenues for environmentally benign PET recycling.
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Affiliation(s)
- Shengbo Zhang
- Department State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University Beijing 100084 China
| | - Yingying Xue
- Laboratory of Theoretical and Computational Nanoscience, CAS Key Laboratory of Nanophotonic Materials and Devices, National Center for Nanoscience and Technology, Chinese Academy of Sciences Beijing 100190 China
| | - Yanfen Wu
- Department State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University Beijing 100084 China
| | - Yu-Xiao Zhang
- Department State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University Beijing 100084 China
| | - Ting Tan
- Laboratory of Theoretical and Computational Nanoscience, CAS Key Laboratory of Nanophotonic Materials and Devices, National Center for Nanoscience and Technology, Chinese Academy of Sciences Beijing 100190 China
| | - Zhiqiang Niu
- Department State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University Beijing 100084 China
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6
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Lee TH, Forrester M, Wang TP, Shen L, Liu H, Dileep D, Kuehl B, Li W, Kraus G, Cochran E. Dihydroxyterephthalate-A Trojan Horse PET Counit for Facile Chemical Recycling. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2210154. [PMID: 36857624 DOI: 10.1002/adma.202210154] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 02/04/2023] [Indexed: 05/26/2023]
Abstract
Here, low-energy poly(ethylene terephthalate) (PET) chemical recycling in water: PET copolymers with diethyl 2,5-dihydroxyterephthalate (DHTE) undergo selective hydrolysis at DHTE sites, autocatalyzed by neighboring group participation, is demonstrated. Liberated oligomeric subchains further hydrolyze until only small molecules remain. Poly(ethylene terephthalate-stat-2,5-dihydroxyterephthalate) copolymers were synthesized via melt polycondensation and then hydrolyzed in 150-200 °C water with 0-1 wt% ZnCl2 , or alternatively in simulated sea water. Degradation progress follows pseudo-first order kinetics. With increasing DHTE loading, the rate constant increases monotonically while the thermal activation barrier decreases. The depolymerization products are ethylene glycol, terephthalic acid, 2,5-dihydroxyterephthalic acid, and bis(2-hydroxyethyl) terephthalate dimer, which could be used to regenerate virgin polymer. Composition-optimized copolymers show a decrease of nearly 50% in the Arrhenius activation energy, suggesting a 6-order reduction in depolymerization time under ambient conditions compared to that of PET homopolymer. This study provides new insight to the design of polymers for end-of-life while maintaining key properties like service temperature and mechanical properties. Moreover, this chemical recycling procedure is more environmentally friendly compared to traditional approaches since water is the only needed material, which is green, sustainable, and cheap.
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Affiliation(s)
- Ting-Han Lee
- Department of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Michael Forrester
- Department of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Tung-Ping Wang
- Department of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Liyang Shen
- Department of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Hengzhou Liu
- Department of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Dhananjay Dileep
- Department of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Baker Kuehl
- Department of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Wenzhen Li
- Department of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA
| | - George Kraus
- Department of Chemistry, Iowa State University, Ames, IA, 50011, USA
| | - Eric Cochran
- Department of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA
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7
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Zunita M, Winoto HP, Fauzan MFK, Haikal R. Recent Advances in Plastics Waste Degradation Using Ionic Liquid-Based Process. Polym Degrad Stab 2023. [DOI: 10.1016/j.polymdegradstab.2023.110320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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8
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Zhang N, Cui X, Wang C, Wu S, Zhao Y, Qi Y, Hou X, Jin H, Deng T. Degradation of vinyl ester resin and its composites via cleavage of ester bonds to recycle valuable chemicals and produce polyurethane. WASTE MANAGEMENT (NEW YORK, N.Y.) 2023; 155:260-268. [PMID: 36402102 DOI: 10.1016/j.wasman.2022.11.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 10/14/2022] [Accepted: 11/06/2022] [Indexed: 06/16/2023]
Abstract
Vinyl ester resins (VER) and its composites are widely used in chemical industry and municipal engineering. However, its dense three-dimensional network structure makes its degradation and recycling a great challenge. Herein, a novel, efficient and green degradation system gamma-valerolactone (GVL)-H2O/p-toluene sulfonic (PTSA) was developed to degrade VER and its composites. VER was completely degraded in the GVL-H2O/PTSA at 210 °C and 0.6 MPa. By combing SEM-EDS, IR, NMR, GPC and MALDI-TOF-MS analysis, it was clarified that VER swelled well in GVL, allowing the transfer of PTSA and H2O through the resin matrix. The ester bonds in VER were cleaved via hydrolysis with H2O catalyzed by the sulfonic acid of PTSA, and high value-added polymer products, i.e., copolymer of styrene and methacrylic acid (SMAA) and bisphenol-A diglycidyl ether (DGEBA), were recycled, which accounted for ca. 87.0 wt% of raw VER. DGEBA can be recycled to prepare a new PU material. The GVL-H2O/PTSA system was also effective for degrading UPR and VER-containing composites. This work provides a practical strategy for chemical degradation and recovery of thermoset VER resins.
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Affiliation(s)
- Ning Zhang
- Shanxi Engineering Research Center of Biorefinery, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China
| | - Xiaojing Cui
- Institute of Interface Chemistry and Engineering, Department of Chemistry and Chemical Engineering, Taiyuan Institute of Technology, Taiyuan, Shanxi 030008, China
| | - Chizhou Wang
- Shanxi Engineering Research Center of Biorefinery, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China
| | - Shaodi Wu
- Shanxi Engineering Research Center of Biorefinery, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China
| | - Yuhua Zhao
- Shanxi Engineering Research Center of Biorefinery, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China
| | - Yongqin Qi
- Shanxi Engineering Research Center of Biorefinery, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China
| | - Xianglin Hou
- Shanxi Engineering Research Center of Biorefinery, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China.
| | - Haibo Jin
- Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology/College of New Materials and Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
| | - Tiansheng Deng
- Shanxi Engineering Research Center of Biorefinery, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China.
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9
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Cao F, Wang L, Zheng R, Guo L, Chen Y, Qian X. Research and progress of chemical depolymerization of waste PET and high-value application of its depolymerization products. RSC Adv 2022; 12:31564-31576. [PMID: 36380916 PMCID: PMC9632252 DOI: 10.1039/d2ra06499e] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 10/28/2022] [Indexed: 09/06/2023] Open
Abstract
PET (polyethylene terephthalate) has good transparency, corrosion resistance, gas barrier properties and mechanical properties, and is widely used in beverage bottles, fabrics, food packaging, tires, films, engineering plastics and other fields. With the rapid growth in demand and use of PET materials, the pollution of waste PET to the environment has become increasingly prominent. The recycling methods of waste PET mainly include primary recycling, mechanical recycling, chemical recycling, and energy recycling. The chemical recycling method is of great significance for solving environmental problems and reducing the plastic industry's dependence on petrochemical resources, and is an inevitable choice for realizing PET closed-loop recycling. In this paper, the chemical depolymerization methods of waste PET, the types of alcoholysis catalysts with the greatest possibility of industrialization, and the high-value application research of chemical recovery products are reviewed in order to have a good reference significance and promote the recycling and high-value utilization of waste PET.
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Affiliation(s)
- Fan Cao
- School of Petrochemical Engineering, Shenyang University of Technology Liaoyang 111003 China
| | - Liyan Wang
- School of Petrochemical Engineering, Shenyang University of Technology Liaoyang 111003 China
| | - Rongrong Zheng
- School of Petrochemical Engineering, Shenyang University of Technology Liaoyang 111003 China
| | - Liying Guo
- School of Petrochemical Engineering, Shenyang University of Technology Liaoyang 111003 China
| | - Yanming Chen
- School of Petrochemical Engineering, Shenyang University of Technology Liaoyang 111003 China
| | - Xin Qian
- Liaoning Shengda Environmental Resources Group Co., Ltd Liaoyang 111003 China
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10
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Ma M, Wang S, Liu Y, Yu H, Yu S, Ji C, Li H, Nie G, Liu S. Insights into the depolymerization of polyethylene terephthalate in methanol. J Appl Polym Sci 2022. [DOI: 10.1002/app.52814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Meiyuan Ma
- Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province, College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
| | - Shuai Wang
- Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province, College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
| | - Yue Liu
- Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province, College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
| | - Hailong Yu
- Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province, College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
| | - Shitao Yu
- Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province, College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
| | - Congcong Ji
- Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province, College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
| | - Haiyan Li
- Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province, College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
| | - Genkuo Nie
- Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province, College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
- Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education Qilu University of Technology (Shandong Academy of Sciences) Jinan China
| | - Shiwei Liu
- Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province, College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
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11
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Yang RX, Jan K, Chen CT, Chen WT, Wu KCW. Thermochemical Conversion of Plastic Waste into Fuels, Chemicals, and Value-Added Materials: A Critical Review and Outlooks. CHEMSUSCHEM 2022; 15:e202200171. [PMID: 35349769 DOI: 10.1002/cssc.202200171] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 03/27/2022] [Indexed: 06/14/2023]
Abstract
Plastic waste is an emerging environmental issue for our society. Critical action to tackle this problem is to upcycle plastic waste as valuable feedstock. Thermochemical conversion of plastic waste has received growing attention. Although thermochemical conversion is promising for handling mixed plastic waste, it typically occurs at high temperatures (300-800 °C). Catalysts can play a critical role in improving the energy efficiency of thermochemical conversion, promoting targeted reactions, and improving product selectivity. This Review aims to summarize the state-of-the-art of catalytic thermochemical conversions of various types of plastic waste. First, general trends and recent development of catalytic thermochemical conversions including pyrolysis, gasification, hydrothermal processes, and chemolysis of plastic waste into fuels, chemicals, and value-added materials were reviewed. Second, the status quo for the commercial implementation of thermochemical conversion of plastic waste was summarized. Finally, the current challenges and future perspectives of catalytic thermochemical conversion of plastic waste including the design of sustainable and robust catalysts were discussed.
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Affiliation(s)
- Ren-Xuan Yang
- Department of Plastics Engineering, University of Massachusetts Lowell, Lowell, MA 01851, USA
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10607, Taiwan
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1 Sec. 3, Chung-Hsiao E. Rd., Taipei, 106344, Taiwan
| | - Kalsoom Jan
- Department of Plastics Engineering, University of Massachusetts Lowell, Lowell, MA 01851, USA
| | - Ching-Tien Chen
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10607, Taiwan
| | - Wan-Ting Chen
- Department of Plastics Engineering, University of Massachusetts Lowell, Lowell, MA 01851, USA
| | - Kevin C-W Wu
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10607, Taiwan
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12
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Chu M, Liu Y, Lou X, Zhang Q, Chen J. Rational Design of Chemical Catalysis for Plastic Recycling. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01286] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Mingyu Chu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China
| | - Yu Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China
| | - Xiangxi Lou
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China
| | - Qiao Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China
| | - Jinxing Chen
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China
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13
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Azeem M, Brennan Fournet M, Attallah OA. Ultrafast 99% Polyethylene terephthalate depolymerization into value added monomers using sequential glycolysis-hydrolysis under microwave irradiation. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.103903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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14
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Kratish Y, Marks TJ. Efficient Polyester Hydrogenolytic Deconstruction via Tandem Catalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202112576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yosi Kratish
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208 3113 USA
| | - Tobin J. Marks
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208 3113 USA
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15
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Ding L, Yu X, Guo X, Zhang Y, Ouyang Z, Liu P, Zhang C, Wang T, Jia H, Zhu L. The photodegradation processes and mechanisms of polyvinyl chloride and polyethylene terephthalate microplastic in aquatic environments: Important role of clay minerals. WATER RESEARCH 2022; 208:117879. [PMID: 34847511 DOI: 10.1016/j.watres.2021.117879] [Citation(s) in RCA: 64] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/13/2021] [Accepted: 11/15/2021] [Indexed: 06/13/2023]
Abstract
It is well known that microplastics (MPs) may experience weathering and aging under ultraviolet light (UV) irradiation, but it remains unclear if these processes are impacted by natural components, such as clay minerals. In this study, we systematically investigated the photodegradation behaviors of polyvinyl chloride (PVC) and poly (ethylene terephthalate) (PET), two utmost used plastics, in the presence of clay minerals (kaolinite and montmorillonite). The results demonstrated that the clay minerals, particularly kaolinite, significantly promoted the MPs photodegradation, and the aging of PET was more prominent. The photodegradation was the most distinct at pH 7.0, regardless of the presence or absence of the clay minerals. The results of electron paramagnetic resonance and inhibition experiments of reactive oxygen species indicated that the minerals, particularly kaolinite, remarkably facilitated production of •OH, which was the key species contributing to the photodegradation of MPs. Specifically, UV irradiation facilitated the photo-ionization of MPs, producing hydrated electrons and MP radical cations (MP+). The Lewis base sites prevalent on the clay siloxane surfaces could stabilize the MP radical cations and prevent their recombination with hydrated electrons, which promoted the generation of •OH under aerobic conditions, and facilitated the degradation of MP. Two-dimensional (2D) Fourier transformation infrared (FTIR) correlation spectroscopy (COS) analysis and ultra-high-performance liquid chromatography coupled to a Q Exactive Orbitrap HF mass spectrometer were used to identify the sequential changes of functional groups, and the degradation products of the MPs. This study improves our understanding on the aging of MPs in the complex natural environment.
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Affiliation(s)
- Ling Ding
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xiaoqin Yu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xuetao Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China.
| | - Yaping Zhang
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhuozhi Ouyang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Peng Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Chi Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Tiecheng Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Hanzhong Jia
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Lingyan Zhu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China.
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16
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Unveiling the microenvironments between ionic liquids and methanol for alcoholysis of poly(ethylene terephthalate). Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Jeya G, Dhanalakshmi R, Anbarasu M, Vinitha V, Sivamurugan V. A short review on latest developments in catalytic depolymerization of Poly (ethylene terephathalate) wastes. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2021.100291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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18
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Surface Interaction of Ionic Liquids: Stabilization of Polyethylene Terephthalate-Degrading Enzymes in Solution. Molecules 2021; 27:molecules27010119. [PMID: 35011351 PMCID: PMC8746539 DOI: 10.3390/molecules27010119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/21/2021] [Accepted: 12/22/2021] [Indexed: 11/17/2022] Open
Abstract
The effect of aqueous solutions of selected ionic liquids solutions on Ideonella sakaiensis PETase with bis(2-hydroxyethyl) terephthalate (BHET) substrate were studied by means of molecular dynamics simulations in order to identify the possible effect of ionic liquids on the structure and dynamics of enzymatic Polyethylene terephthalate (PET) hydrolysis. The use of specific ionic liquids can potentially enhance the enzymatic hydrolyses of PET where these ionic liquids are known to partially dissolve PET. The aqueous solution of cholinium phosphate were found to have the smallest effect of the structure of PETase, and its interaction with (BHET) as substrate was comparable to that with the pure water. Thus, the cholinium phosphate was identified as possible candidate as ionic liquid co-solvent to study the enzymatic hydrolyses of PET.
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19
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Kratish Y, Marks TJ. Efficient Polyester Hydrogenolytic Deconstruction via Tandem Catalysis. Angew Chem Int Ed Engl 2021; 61:e202112576. [PMID: 34845815 DOI: 10.1002/anie.202112576] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/11/2021] [Indexed: 12/11/2022]
Abstract
Using a mechanism-based solvent-free tandem catalytic approach, commodity polyester plastics such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyethylene naphthalate (PEN) are rapidly and selectively deconstructed by combining the two air- and moisture-stable catalysts, Hf(OTf)4 and Pd/C, under 1 atm H2 , affording terephthalic acid (or naphthalene dicarboxylic acid for PEN) and ethane (or butane for PBT) in essentially quantitative yield. This process is effective for both laboratory grade and waste plastics, and comingled polypropylene remains unchanged. Combined experimental and DFT mechanistic analyses indicate that Hf(OTf)4 catalyzes a mildly exergonic retro-hydroalkoxylation reaction in which an alkoxy C-O bond is first cleaved, yielding a carboxylic acid and alkene, and this process is closely coupled to an exergonic olefin hydrogenation step, driving the overall reaction forward.
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Affiliation(s)
- Yosi Kratish
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208 3113, USA
| | - Tobin J Marks
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208 3113, USA
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20
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Chen H, Wan K, Zhang Y, Wang Y. Waste to Wealth: Chemical Recycling and Chemical Upcycling of Waste Plastics for a Great Future. CHEMSUSCHEM 2021; 14:4123-4136. [PMID: 33998153 DOI: 10.1002/cssc.202100652] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/12/2021] [Indexed: 06/12/2023]
Abstract
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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Affiliation(s)
- Huan Chen
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, No. 130 Meilong Road, Shanghai, 200237, P.R. China
| | - Kun Wan
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, No. 130 Meilong Road, Shanghai, 200237, P.R. China
| | - Yayun Zhang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, No. 130 Meilong Road, Shanghai, 200237, P.R. China
| | - Yanqin Wang
- Shanghai Key Laboratory of Functional Materials Chemistry and Research, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, No. 130 Meilong Road, Shanghai, 200237, P.R. China
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21
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Ghasemi MH, Neekzad N, Ajdari FB, Kowsari E, Ramakrishna S. Mechanistic aspects of poly(ethylene terephthalate) recycling-toward enabling high quality sustainability decisions in waste management. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:43074-43101. [PMID: 34146328 DOI: 10.1007/s11356-021-14925-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 06/11/2021] [Indexed: 06/12/2023]
Abstract
Since plastic waste pollution is a severe environmental concern in modern life, the demand for recycling poly(ethylene terephthalate) (PET) has increased due to its versatile applications. Taking advantage of plastic recycling methods creates the chances of minimizing overall crude oil-based materials consumption, and as a result, greenhouse gasses, specifically CO2, will be decreased. Although many review articles have been published on plastic recycling methods from different aspects, a few review articles exist to investigate the organic reaction mechanism in plastic recycling. This review aims to describe other processes for recycling bottle waste of PET, considering the reaction mechanism. Understanding the reaction mechanism offers practical solutions toward protecting the environment against disadvantageous outgrowths rising from PET wastes. PET recycling aims to transform into a monomer/oligomer to produce new materials from plastic wastes. It is an application in various fields, including the food and beverage industry, packaging, and textile applications, to protect the environment from contamination and introduce a green demand for the near future. In this review, the chemical glycolysis process as an outstanding recycling technique for PET is also discussed, emphasizing the catalysts' performance, reaction conditions and methods, degradation agents, the kinetics of reactions, and reprocessing products. In general, a correct understanding of the PET recycling reaction mechanism leads to making the right decisions in waste management.
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Affiliation(s)
- Mohammad Hadi Ghasemi
- Applied Chemistry Research Group, ACECR-Tehran Organization, PO Box 13145-186, Tehran, Iran
| | - Nariman Neekzad
- Department of Chemistry, Amirkabir University of Technology, No. 424, Hafez Avenue, Tehran, 1591634311, Iran
| | | | - Elaheh Kowsari
- Department of Chemistry, Amirkabir University of Technology, No. 424, Hafez Avenue, Tehran, 1591634311, Iran.
| | - Seeram Ramakrishna
- Department of Mechanical Engineering, Center for Nanofibers and Nanotechnology, National University of Singapore, Singapore, 119260, Singapore.
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22
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Sadler JC, Wallace S. Microbial synthesis of vanillin from waste poly(ethylene terephthalate). GREEN CHEMISTRY : AN INTERNATIONAL JOURNAL AND GREEN CHEMISTRY RESOURCE : GC 2021; 23:4665-4672. [PMID: 34276250 PMCID: PMC8256426 DOI: 10.1039/d1gc00931a] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 05/12/2021] [Indexed: 05/05/2023]
Abstract
Poly(ethylene terephthalate) (PET) is an abundant and extremely useful material, with widespread applications across society. However, there is an urgent need to develop technologies to valorise post-consumer PET waste to tackle plastic pollution and move towards a circular economy. Whilst PET degradation and recycling technologies have been reported, examples focus on repurposing the resultant monomers to produce more PET or other second-generation materials. Herein, we report a novel pathway in engineered Escherichia coli for the direct upcycling of PET derived monomer terephthalic acid into the value-added small molecule vanillin, a flavour compound ubiquitous in the food and cosmetic industries, and an important bulk chemical. After process optimisation, 79% conversion to vanillin from TA was achieved, a 157-fold improvement over our initial conditions. Parameters such as temperature, cell permeabilisation and in situ product removal were key to maximising vanillin titres. Finally, we demonstrate the conversion of post-consumer PET from a plastic bottle into vanillin by coupling the pathway with enzyme-catalysed PET hydrolysis. This work demonstrates the first biological upcycling of post-consumer plastic waste into vanillin using an engineered microorganism.
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Affiliation(s)
- Joanna C Sadler
- Institute of Quantitative Biology, Biochemistry and Biotechnology, School of Biological Sciences, University of Edinburgh Roger Land Building Alexander Crum Brown Road King's Buildings Edinburgh EH9 3FF UK
| | - Stephen Wallace
- Institute of Quantitative Biology, Biochemistry and Biotechnology, School of Biological Sciences, University of Edinburgh Roger Land Building Alexander Crum Brown Road King's Buildings Edinburgh EH9 3FF UK
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23
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Worch JC, Dove AP. 100th Anniversary of Macromolecular Science Viewpoint: Toward Catalytic Chemical Recycling of Waste (and Future) Plastics. ACS Macro Lett 2020; 9:1494-1506. [PMID: 35617072 DOI: 10.1021/acsmacrolett.0c00582] [Citation(s) in RCA: 112] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The current global materials economy has long been inefficient due to unproductive reuse and recycling efforts. Within the wider materials portfolio, plastics have been revolutionary to many industries but they have been treated as disposable commodities leading to their increasing accumulation in the environment as waste. The field of chemistry has had significant bearing in ushering in the current plastics industry and will undoubtedly have a hand in transforming it to become more sustainable. Existing approaches include the development of synthetic biodegradable plastics and turning to renewable raw materials in order to produce plastics similar to our current petrol-based materials or to create new polymers. Additionally, chemists are confronting the environmental crisis by developing alternative recycling methods to deal with the legacy of plastic waste. Important emergent technologies, such as catalytic chemical recycling or upcycling, have the potential to alleviate numerous issues related to our current and future refuse and, in doing so, help pivot our materials economy from linearity to circularity.
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Affiliation(s)
- Joshua C. Worch
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Andrew P. Dove
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
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24
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Kratish Y, Li J, Liu S, Gao Y, Marks TJ. Polyethylene Terephthalate Deconstruction Catalyzed by a Carbon‐Supported Single‐Site Molybdenum‐Dioxo Complex. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007423] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yosi Kratish
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208-3113 USA
| | - Jiaqi Li
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208-3113 USA
| | - Shanfu Liu
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208-3113 USA
| | - Yanshan Gao
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208-3113 USA
| | - Tobin J. Marks
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208-3113 USA
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25
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Kratish Y, Li J, Liu S, Gao Y, Marks TJ. Polyethylene Terephthalate Deconstruction Catalyzed by a Carbon‐Supported Single‐Site Molybdenum‐Dioxo Complex. Angew Chem Int Ed Engl 2020; 59:19857-19861. [DOI: 10.1002/anie.202007423] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 06/29/2020] [Indexed: 12/30/2022]
Affiliation(s)
- Yosi Kratish
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208-3113 USA
| | - Jiaqi Li
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208-3113 USA
| | - Shanfu Liu
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208-3113 USA
| | - Yanshan Gao
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208-3113 USA
| | - Tobin J. Marks
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208-3113 USA
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26
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27
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Ahmadi F, Samlali K, Vo PQN, Shih SCC. An integrated droplet-digital microfluidic system for on-demand droplet creation, mixing, incubation, and sorting. LAB ON A CHIP 2019; 19:524-535. [PMID: 30633267 DOI: 10.1039/c8lc01170b] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Droplet microfluidics is a technique that has the ability to compartmentalize reactions in sub nano- (or pico-) liter volumes that can potentially enable millions of distinct biological assays to be performed on individual cells. In a typical droplet microfluidic system, droplets are manipulated by pressure-based flows. This has limited the fluidic operations that can be performed in these devices. Digital microfluidics is an alternative microfluidic paradigm with precise control and manipulation over individual droplets. Here, we implement an integrated droplet-digital microfluidic (which we call 'ID2M') system in which common fluidic operations (i.e. droplet generation, cell encapsulation, droplet merging and mixing, droplet trapping and incubation, and droplet sorting) can be performed. With the addition of electrodes, we have been able to create droplets on-demand, tune their volumes on-demand, and merge and mix several droplets to produce a dilution series. Moreover, this device can trap and incubate droplets for 24 h that can consequently be sorted and analyzed in multiple n-ary channels (as opposed to typical binary channels). The ID2M platform has been validated as a robust on-demand screening system by sorting fluorescein droplets of different concentration with an efficiency of ∼96%. The utility of the new system is further demonstrated by culturing and sorting tolerant yeast mutants and wild-type yeast cells in ionic liquid based on their growth profiles. This new platform for both droplet and digital microfluidics has the potential to be used for screening different conditions on-chip and for applications like directed evolution.
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Affiliation(s)
- Fatemeh Ahmadi
- Department of Electrical and Computer Engineering, Concordia University, Montréal, Québec, Canada.
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28
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Scé F, Cano I, Martin C, Beobide G, Castillo Ó, de Pedro I. Comparing conventional and microwave-assisted heating in PET degradation mediated by imidazolium-based halometallate complexes. NEW J CHEM 2019. [DOI: 10.1039/c8nj06090h] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tailoring halometallate-based ionic liquids (bulkiness and polarization) to be more active catalysts for PET glycolysis under conventional and microwave-assisted heating conditions.
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Affiliation(s)
- Fabio Scé
- Universidad de Cantabria
- CITIMAC
- Facultad de Ciencias
- Avda. de los Castros s/n
- 39005 Santander
| | - Israel Cano
- GSK Carbon Neutral Laboratory for Sustainable Chemistry
- University of Nottingham
- NG7 2GA
- UK
| | - Carmen Martin
- GSK Carbon Neutral Laboratory for Sustainable Chemistry
- University of Nottingham
- NG7 2GA
- UK
| | - Garikoitz Beobide
- Universidad de Cantabria
- CITIMAC
- Facultad de Ciencias
- Avda. de los Castros s/n
- 39005 Santander
| | - Óscar Castillo
- Universidad del País Vasco
- Departamento de Química Inorgánica
- Facultad de Ciencia y Tecnología
- Apartado 644
- Bilbao
| | - Imanol de Pedro
- Universidad de Cantabria
- CITIMAC
- Facultad de Ciencias
- Avda. de los Castros s/n
- 39005 Santander
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29
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Jehanno C, Pérez-Madrigal MM, Demarteau J, Sardon H, Dove AP. Organocatalysis for depolymerisation. Polym Chem 2019. [DOI: 10.1039/c8py01284a] [Citation(s) in RCA: 126] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Chemical recycling of plastics offers a green method to deal with plastic waste. In this review, we highlight the recent advances made by applying organocatalysts to chemically degrade polymers as a promising tool to reach a circular plastic economy.
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Affiliation(s)
- Coralie Jehanno
- POLYMAT
- University of the Basque Country UPV/EHU
- Joxe Mari Korta Center
- 20018 Donostia-San Sebastian
- Spain
| | | | - Jeremy Demarteau
- POLYMAT
- University of the Basque Country UPV/EHU
- Joxe Mari Korta Center
- 20018 Donostia-San Sebastian
- Spain
| | - Haritz Sardon
- POLYMAT
- University of the Basque Country UPV/EHU
- Joxe Mari Korta Center
- 20018 Donostia-San Sebastian
- Spain
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30
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Liu B, Lu X, Ju Z, Sun P, Xin J, Yao X, Zhou Q, Zhang S. Ultrafast Homogeneous Glycolysis of Waste Polyethylene Terephthalate via a Dissolution-Degradation Strategy. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b03854] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Bo Liu
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xingmei Lu
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Zhaoyang Ju
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China
- College of Engineering, China Agricultural University, Beijing 100083, P. R. China
| | - Peng Sun
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Jiayu Xin
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Xiaoqian Yao
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Qing Zhou
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Suojiang Zhang
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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