Hydrogenation of polyethylene terephthalate to environmentally friendly polyester over Vulcan XC-72 carbon supported Rh-Pt bimetallic catalyst
| Autor: | Avinash B. Lende, Saurav Bhattacharjee, Chung-Sung Tan |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
chemistry.chemical_classification
Materials science Catalyst support chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences Polyester chemistry.chemical_compound Adsorption Polyol chemistry Chemical engineering Polyethylene terephthalate 0210 nano-technology Bimetallic strip Carbon |
| Zdroj: | Catalysis Today. :117-124 |
| ISSN: | 0920-5861 |
| DOI: | 10.1016/j.cattod.2020.09.013 |
| Popis: | This study demonstrates the direct hydrogenation of polyethylene terephthalate (PET) dissolved in 1,1,1,3,3,3-hexafluro-2-propanol to environmentally friendly polyester polyethylene-1,4-cyclohexanedicarboxylate (PECHD) using a Vulcan XC-72 supported Rh-Pt bimetallic catalyst synthesized via a polyol method. The hydrogenation of PET was promoted by RhOx species present on the catalyst support surface which was generated using the polyol synthesis method. As compared to the monometallic Rh catalyst, the Rh-Pt bimetallic catalyst was found to be superior for hydrogenation of PET. This superiority was attributed to the strong aromatic ring adsorption ability of Rh working in synergy with an increased H2 spillover by Pt. At a H2 pressure of 6.89 MPa and 50 °C for 60 min, complete hydrogenation of PET to PECHD was achieved over the Rh-Pt bimetallic catalyst possessing theoretical Rh and Pt metal loadings of 2.5 wt% each. PECHD was found to be recovered to a very high extent using the compressed CO2 anti-solvent technique after hydrogenation of PET. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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