A highly porous MgAl2O4 spinel-supported Mn3O4 as a reusable catalyst for glycolysis of postconsumer PET wasteopen accessA highly porous MgAl2O4 spinel-supported Mn3O4 as a reusable catalyst for glycolysis of postconsumer PET waste
- Authors
- Zhang, H.; Choi, J.I.; Choi, J.-W.; Jeong, S.-M.; Lee, Pyung-Soo; Hong, D.-Y.
- Issue Date
- Nov-2022
- Publisher
- Korean Society of Industrial Engineering Chemistry
- Keywords
- BHET; Heterogeneous catalyst; PET; Porous metal oxide spinel; Regenerable catalyst
- Citation
- Journal of Industrial and Engineering Chemistry, v.115, pp 251 - 262
- Pages
- 12
- Journal Title
- Journal of Industrial and Engineering Chemistry
- Volume
- 115
- Start Page
- 251
- End Page
- 262
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/60403
- DOI
- 10.1016/j.jiec.2022.08.006
- ISSN
- 1226-086X
1876-794X
- Abstract
- A porous MgAl2O4 spinel-supported Mn3O4 catalyst, which is an efficient and robust catalyst for polyethylene terephthalate (PET) glycolysis, was synthesized from MgAl-layered double hydroxide (LDH) as a template via thermal and chemical treatment, followed by Mn oxide loading. A mesoporous structure in the MgAl2O4 spinel provided a high surface area (278 m2/g) and defects in which Mn3O4 was highly dispersed and strongly stabilized by the substitution of Al3+ and incorporation of Mn cation into the defects. The strong interaction of Mn oxide and the porous MgAl2O4 spinel support led to a dramatic increase of moderate acidic and basic properties, and to high resistance for Mn leaching during glycolysis. Using the Mn3O4/p-spMgAl800 catalyst, a yield of bis(2-hydroxyethyl) terephthalate > 95 % was achieved within 3 h at 190 °C. Despite eleven recycling times with regeneration, the catalytic activity remained without significant deactivation and was completely recovered after thermal regeneration at 500 °C. © 2022 The Authors
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