High-efficiency glycolysis of poly(ethylene terephthalate) by sandwich-structure polyoxometalate catalyst with two active sites | |
Fang, Pengtao1,2; Liu, Bo2,3; Xu, Junli2; Zhou, Qing2; Zhang, Suojiang2,3; Ma, Junying1; Lu, Xingmei2,3 | |
刊名 | POLYMER DEGRADATION AND STABILITY
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2018-10-01 | |
卷号 | 156页码:22-31 |
关键词 | Poly(Ethylene Terephthalate) Glycolysis Catalyst Sandwich-structure Polyoxometalate |
ISSN号 | 0141-3910 |
DOI | 10.1016/j.polymdegradstab.2018.07.004 |
英文摘要 | Catalyst in the process on glycolysis of poly (ethylene terephthalate) (PET) wastes is a significant critical factor, which determine the efficiency and the cost of PET degradation. In this study, a kind of transition- metal-substituted polyoxometalates (POMs) Na-12 [WZnM2(H2O)(2)(ZnW9O34)(2)] =(M = Zn2+, Mn2+, Co2+, Cu2+, Ni2+) which have a sandwich-structure and more than two transition metal active sites show excellent catalytic performance in the glycolysis of PET under mild conditions. We investigated the effects of temperature, reaction time and catalyst amount on PET degradation and obtained the glycolysis optimal conditions. The PET could be fast and completely degraded at 190 degrees C for 40 min with low catalyst/PET molar ratio (0.018%) and high PET/Ethylene Glycol (EG) weight ratio (1:4), and the yield of bis(hydroxyethyl) terephthalate (BHET) is higher than 84.5%. After four-times recycling, the conversion of PET and the yield of BHET can still reach 100% and 84.5%. The exact structure of POMs Na-12 [WZnM2(H2O)(2)(ZnW9O34)(2)] is confirmed by Single Crystal X-ray Diffraction (SC-XRD). Compared with traditional heteropolyacid catalysts, this catalyst possessed of at least two transition metal active sites, which lead to its an excellent catalytic capacity. The possible coordination activates mechanism for PET glycolysis is also proposed. (C) 2018 Elsevier Ltd. All rights reserved. |
资助项目 | National Natural Science Foundation of China[21476234] ; National Natural Science Foundation of China[21776289] ; National Natural Science Foundation of China[21336002] |
WOS关键词 | Ionic Liquids ; Waste ; Hydrolysis ; Pet ; Polymerization ; Terephthalate ; Bottles ; Acid |
WOS研究方向 | Polymer Science |
语种 | 英语 |
出版者 | ELSEVIER SCI LTD |
WOS记录号 | WOS:000448091400003 |
资助机构 | National Natural Science Foundation of China |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/26403] ![]() |
专题 | 中国科学院过程工程研究所 |
通讯作者 | Ma, Junying; Lu, Xingmei |
作者单位 | 1.Henan Univ Sci & Technol, Luoyang 471000, Peoples R China 2.Chinese Acad Sci, CAS Key Lab, Beijing Key Lab Ion Liquids Clean Proc, Green Proc Engn Inst, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Fang, Pengtao,Liu, Bo,Xu, Junli,et al. High-efficiency glycolysis of poly(ethylene terephthalate) by sandwich-structure polyoxometalate catalyst with two active sites[J]. POLYMER DEGRADATION AND STABILITY,2018,156:22-31. |
APA | Fang, Pengtao.,Liu, Bo.,Xu, Junli.,Zhou, Qing.,Zhang, Suojiang.,...&Lu, Xingmei.(2018).High-efficiency glycolysis of poly(ethylene terephthalate) by sandwich-structure polyoxometalate catalyst with two active sites.POLYMER DEGRADATION AND STABILITY,156,22-31. |
MLA | Fang, Pengtao,et al."High-efficiency glycolysis of poly(ethylene terephthalate) by sandwich-structure polyoxometalate catalyst with two active sites".POLYMER DEGRADATION AND STABILITY 156(2018):22-31. |
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