CAS OpenIR
Easily recoverable and reusable p-toluenesulfonic acid for faster hydrolysis of waste polyethylene terephthalate
Yang, Weisheng1; Wang, Juan1; Jiao, Liang2; Song, Yang1; Li, Chang1; Hu, Chaoquan1,3
2022-02-07
Source PublicationGREEN CHEMISTRY
ISSN1463-9262
Volume24Issue:3Pages:1362-1372
AbstractCommon technologies for waste polyethylene terephthalate (PET) hydrolysis generally use strong acids or alkalis as catalysts; however, these processes are costly and generate a large amount of acid, alkali, and salt wastewater. In addition, these catalysts are difficult to recycle and reuse, which is not in line with the concept of sustainable development. This study describes the use of concentrated p-toluenesulfonic acid (PTSA) as an acid catalyst for PET hydrolysis under relatively mild conditions, enabling the degradation of approximately 100% of PET into 96.2% of terephthalic acid (TPA) within 90 minutes at 150 degrees C. A similar degradation efficiency can only be achieved at 150 degrees C using concentrated sulfuric acid for over 5 h. The generated TPA was easily separated from the hydrolysis system via filtration. The used PTSA was easily recovered from the filtrate after TPA collection using simple concentration and crystallization technologies. The recovered PTSA still maintained excellent catalytic efficiency for PET hydrolysis after five consecutive cycles. Furthermore, the kinetics of the reaction confirmed that the PET hydrolysis catalyzed by concentrated PTSA conforms to a first-order reaction with a relatively low apparent activation energy of 76.4-125.4 kJ mol(-1). Finally, the technical feasibility and environmental impact of a scale-up were evaluated using Aspen Plus simulations. Overall, this work proposes a feasible and green strategy for the low-cost and environmentally friendly hydrolysis of waste PET.
DOI10.1039/d1gc04567a
Language英语
WOS KeywordSULFURIC-ACID ; PET ; POLY(ETHYLENE-TEREPHTHALATE) ; DEGRADATION ; KINETICS ; ALCOHOLYSIS ; PRODUCTS ; POWDER
Funding ProjectKey Research Program of Nanjing IPE Institute of Green Manufacturing Industry ; National Natural Science Foundation of China[22078328]
WOS Research AreaChemistry ; Science & Technology - Other Topics
WOS SubjectChemistry, Multidisciplinary ; Green & Sustainable Science & Technology
Funding OrganizationKey Research Program of Nanjing IPE Institute of Green Manufacturing Industry ; National Natural Science Foundation of China
WOS IDWOS:000746663200001
PublisherROYAL SOC CHEMISTRY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/51797
Collection中国科学院过程工程研究所
Corresponding AuthorHu, Chaoquan
Affiliation1.Nanjing IPE Inst Green Mfg Ind, Nanjing 211135, Jiangsu, Peoples R China
2.Nanjing Forestry Univ, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat F, Nanjing 210037, Jiangsu, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Yang, Weisheng,Wang, Juan,Jiao, Liang,et al. Easily recoverable and reusable p-toluenesulfonic acid for faster hydrolysis of waste polyethylene terephthalate[J]. GREEN CHEMISTRY,2022,24(3):1362-1372.
APA Yang, Weisheng,Wang, Juan,Jiao, Liang,Song, Yang,Li, Chang,&Hu, Chaoquan.(2022).Easily recoverable and reusable p-toluenesulfonic acid for faster hydrolysis of waste polyethylene terephthalate.GREEN CHEMISTRY,24(3),1362-1372.
MLA Yang, Weisheng,et al."Easily recoverable and reusable p-toluenesulfonic acid for faster hydrolysis of waste polyethylene terephthalate".GREEN CHEMISTRY 24.3(2022):1362-1372.
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