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Polymerization of ethylene over rac - Et(1 - indenyl)2ZrCl2/MAO catalyst supported on pseudo - inverse opal silica particles / Sang Yool Lee in Industrial & engineering chemistry research, Vol. 51 N° 29 (Juillet 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 29 (Juillet 2012) . - pp. 9742-9749 Titre : Polymerization of ethylene over rac - Et(1 - indenyl)2ZrCl2/MAO catalyst supported on pseudo - inverse opal silica particles Type de document : texte imprimé Auteurs : Sang Yool Lee, Auteur ; Kyu Yong Choi, Auteur Année de publication : 2012 Article en page(s) : pp. 9742-9749 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Catalyst  support  Polymerization Résumé : The polymerization of ethylene with rac-Et(1-indenyl)2ZrCl2/MAO catalyst supported on ultraporous and spherical pseudo-inverse opal silica (PIOS) particles with unique morphology is reported. The novel silica particles with an inverse opal-like structure provide wide-open pore and surface structures favorable for the catalyst deposition and monomer access with minimal intraparticle diffusion resistance. The metallocene catalyst supported on the PIOS support exhibited very high initial catalyst activity and longer catalyst lifetime compared with conventional silica-supported catalysts. The experimental data that show the effects of support geometry on the catalytic activity, catalyst particle fragmentation, polymer particle morphology, and polymer molecular weight distribution in ethylene polymerization are presented. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26184952 [article] Polymerization of ethylene over rac - Et(1 - indenyl)2ZrCl2/MAO catalyst supported on pseudo - inverse opal silica particles [texte imprimé] / Sang Yool Lee, Auteur ; Kyu Yong Choi, Auteur . - 2012 . - pp. 9742-9749. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 29 (Juillet 2012) . - pp. 9742-9749 Mots-clés : Catalyst  support  Polymerization Résumé : The polymerization of ethylene with rac-Et(1-indenyl)2ZrCl2/MAO catalyst supported on ultraporous and spherical pseudo-inverse opal silica (PIOS) particles with unique morphology is reported. The novel silica particles with an inverse opal-like structure provide wide-open pore and surface structures favorable for the catalyst deposition and monomer access with minimal intraparticle diffusion resistance. The metallocene catalyst supported on the PIOS support exhibited very high initial catalyst activity and longer catalyst lifetime compared with conventional silica-supported catalysts. The experimental data that show the effects of support geometry on the catalytic activity, catalyst particle fragmentation, polymer particle morphology, and polymer molecular weight distribution in ethylene polymerization are presented. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26184952