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Relationship between the surface properties and the catalytic performance of Al-, Ga-, and AlGa-pillared saponites / Miguel Angel Vicente in Industrial & engineering chemistry research, Vol. 48 N°1 (Janvier 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - P. 406-414 Titre : Relationship between the surface properties and the catalytic performance of Al-, Ga-, and AlGa-pillared saponites Type de document : texte imprimé Auteurs : Miguel Angel Vicente, Editeur scientifique ; Carolina Belver, Editeur scientifique ; Mikhail Sychev, Editeur scientifique Année de publication : 2009 Article en page(s) : P. 406-414 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Surface  properties  Catalytic  performance  Physicochemical  characteristics Résumé : A saponite from Ballarat, CA was intercalated with solutions containing only-Al, only-Ga, and two mixed AlGa-polycations, with various Al/Ga ratios. The pillared solids were obtained by calcination of the intercalated precursors at two temperatures, 300 and 500 °C. The physicochemical characteristics of the solids were studied by several techniques (XRD, N2 adsorption at −196 °C, TG, DTA, FT-IR and UV−vis−NIR) and also by means of their behavior in various acid-catalyzed reactions. All the solids showed layered, ordered structure with basal spacings of ca. 18 Å and high specific surface areas between 247 and 387 m2/g (intercalated solids), 236 and 320 m2/g (calcined at 300 °C), and 201 and 331 m2/g (calcined at 500 °C). The materials were tested as catalysts in several reactions, including liquid-phase (rearrangement of α-pinene to camphene and methanol addition to 3,4-dihydropyran) and gas-phase processes (dehydration of the alcohols 2-methyl-3-butyn-2-ol and 2-propanol and cumene conversion). The catalytic behavior of the solids was discussed in terms of their surface properties and synthesis procedure. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801301a [article] Relationship between the surface properties and the catalytic performance of Al-, Ga-, and AlGa-pillared saponites [texte imprimé] / Miguel Angel Vicente, Editeur scientifique ; Carolina Belver, Editeur scientifique ; Mikhail Sychev, Editeur scientifique . - 2009 . - P. 406-414. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - P. 406-414 Mots-clés : Surface  properties  Catalytic  performance  Physicochemical  characteristics Résumé : A saponite from Ballarat, CA was intercalated with solutions containing only-Al, only-Ga, and two mixed AlGa-polycations, with various Al/Ga ratios. The pillared solids were obtained by calcination of the intercalated precursors at two temperatures, 300 and 500 °C. The physicochemical characteristics of the solids were studied by several techniques (XRD, N2 adsorption at −196 °C, TG, DTA, FT-IR and UV−vis−NIR) and also by means of their behavior in various acid-catalyzed reactions. All the solids showed layered, ordered structure with basal spacings of ca. 18 Å and high specific surface areas between 247 and 387 m2/g (intercalated solids), 236 and 320 m2/g (calcined at 300 °C), and 201 and 331 m2/g (calcined at 500 °C). The materials were tested as catalysts in several reactions, including liquid-phase (rearrangement of α-pinene to camphene and methanol addition to 3,4-dihydropyran) and gas-phase processes (dehydration of the alcohols 2-methyl-3-butyn-2-ol and 2-propanol and cumene conversion). The catalytic behavior of the solids was discussed in terms of their surface properties and synthesis procedure. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801301a