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Characterization of solid acid catalysts and their reactivity in the glycolysis of poly(ethylene terephthalate) / Minli Zhu in Industrial & engineering chemistry research, Vol. 51 N° 36 (Septembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 36 (Septembre 2012) . - pp. 11659-11666 Titre : Characterization of solid acid catalysts and their reactivity in the glycolysis of poly(ethylene terephthalate) Type de document : texte imprimé Auteurs : Minli Zhu, Auteur ; Zengxi Li, Auteur ; Qian Wang, Auteur Année de publication : 2012 Article en page(s) : pp. 11659-11666 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Chemical  reactivity  Acid  catalysis Résumé : Glycolysis of poly(ethylene terephthalate) with ethylene glycol was carried out with the catalysts of sulfated cobalt oxide (SO42―/Co3O4) and zinc-modified sulfated cobalt oxide (SO42―/Co―Zn―O). The catalysts prepared at different calcination temperatures have been characterized by various techniques. These techniques include X-ray diffraction, Raman spectrum, gas adsorption analysis, NH3-temperature programmed desorption, and IR spectroscopy of pyridine adsorption. The performances of these catalysts on the depolymerization of PET under mild conditions were studied, and relationships between the catalysts' textural properties, the surface acidity, and the catalytic activity have been investigated. The experimental results showed that the catalytic activity on glycolysis of PET was significantly improved by the catalysts of binary sulfur oxides of SO42―/Co―Zn―O. The conversion of PET obtained on SO42―/Co―Zn―O-300 °C was 96%, and the selectivity of BHET was 75%, after 3 h at 180 °C under atmospheric pressure. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26350332 [article] Characterization of solid acid catalysts and their reactivity in the glycolysis of poly(ethylene terephthalate) [texte imprimé] / Minli Zhu, Auteur ; Zengxi Li, Auteur ; Qian Wang, Auteur . - 2012 . - pp. 11659-11666. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 36 (Septembre 2012) . - pp. 11659-11666 Mots-clés : Chemical  reactivity  Acid  catalysis Résumé : Glycolysis of poly(ethylene terephthalate) with ethylene glycol was carried out with the catalysts of sulfated cobalt oxide (SO42―/Co3O4) and zinc-modified sulfated cobalt oxide (SO42―/Co―Zn―O). The catalysts prepared at different calcination temperatures have been characterized by various techniques. These techniques include X-ray diffraction, Raman spectrum, gas adsorption analysis, NH3-temperature programmed desorption, and IR spectroscopy of pyridine adsorption. The performances of these catalysts on the depolymerization of PET under mild conditions were studied, and relationships between the catalysts' textural properties, the surface acidity, and the catalytic activity have been investigated. The experimental results showed that the catalytic activity on glycolysis of PET was significantly improved by the catalysts of binary sulfur oxides of SO42―/Co―Zn―O. The conversion of PET obtained on SO42―/Co―Zn―O-300 °C was 96%, and the selectivity of BHET was 75%, after 3 h at 180 °C under atmospheric pressure. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26350332