| Title | Kaolin supported niobia for microwave-assisted aminolytic depolymerization in the chemical recycling of polyester waste |
|---|---|
| ID_Doc | 8327 |
| Authors | Revathi, M; Sivamurugan, V; Dhanalakshmi, R; Bennie, RB; Joel, C |
| Title | Kaolin supported niobia for microwave-assisted aminolytic depolymerization in the chemical recycling of polyester waste |
| Year | 2024 |
| Published | Ceramics International, 50.0, 17 |
| Abstract | Polyethylene terephthalate (PET), a widely used polymer in the production of single-use plastics, is a significant contributor to the global plastic pollution problem. This work explores the synergistic effects between clay matrices and active Nb2O5 catalytic species, emphasizing the enhanced catalytic performance for the aminolytic depolymerization of PET and polyester (PES) wastes. The materials were well characterized using XRD, SEMEDS, FTIR, and UV-DRS studies. The surface parameters of Nb2O5 were enhanced by forming a composite with kaolin, which is confirmed by BET isotherms. Kaolin provides a large surface area, which enhances the dispersion and interaction of the niobia catalyst. The combination of kaolin and niobia acts as an effective catalyst for the depolymerization of PET, breaking down the polymer into its monomeric constituents. The catalytic efficiency of Nb2O5 (82 %) has been enhanced in the presence of kaolin support (95 %), forming depolymerized bis(2-hydroxyethyl)terephthalamide (BHETA) and excellent reusability and stability of up to five subsequent cycles thereby emphasizing their potential for sustained performance in industrial applications and contributing to the ongoing discourse on advancing catalyst technologies for enhanced environmental impact in the circular economy. |
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