Valorization of urban and marine PET waste by optimized chemical recycling

Autor: Eider Mendiburu-Valor, Gurutz Mondragon, Nekane González, Galder Kortaberria, Loli Martin, Arantxa Eceiza, Cristina Peña-Rodriguez
Rok vydání: 2022
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Zdroj: Addi. Archivo Digital para la Docencia y la Investigación
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ISSN: 0921-3449
DOI: 10.1016/j.resconrec.2022.106413
Popis: The degradation of two poly(ethylene terephtalate) (PET) samples from urban and marine wastes (PET-u and PET-m, respectively) has been studied by comparing their properties with those of virgin PET (PET-v) and post condensed PET for bottle fabrication (PET-ssp). FTIR spectroscopy, DSC analysis, WCA and MFI results have confirmed that all PET residues were degraded. Therefore, the chemical recycling has been evaluated in order to valorize PET-m and PET-u wastes, analyzing the effect of degradation on the process. Glycolysis of degraded and non-degraded PET samples has been carried out in a pressure reactor at 220C for 30 min. For all the cases almost pure BHET monomer has been obtained: 96.5 and 96.7 % for PET-m and PET-u respectively, values 2 and 13 % higher than those obtained for PET-ssp and PET-v. Obtained results indicate that the initial degradation of PET wastes increases the BHET monomer content in the glycolyzed sample. Financial support from the University of the Basque Country in the frame of GIU18/216 and from the Provincial Council of Gipuzkoa (ItsasMikro project) are gratefully acknowledged. Authors thank the Circular Economy University-Company Classroom (Faculty of Engineering Gipuzkoa, UPV/EHU, Provincial Council of Gipuzkoa) . More-over, we are grateful to the Macrobehaviour-Mesostructure-Nanotechnology SGIker unit of UPV/EHU. Eider Mendiburu Valor thanks Basque Government for PhD grant (PRE_2018_1_0014) .
Databáze: OpenAIRE
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