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Tungstophosphoric acid immobilized on ammonium Y and ZSM5 zeolites Synthesis, characterization and catalytic evaluation精品.pdf

发布：2018-04-22约7.16万字共10页下载文档

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Applied Catalysis B: Environmental 130–131 (2013) 187–196 Contents lists available at SciVerse ScienceDirect Applied Catalysis B: Environmental j o u r n a l h o m epage: w w w. elsev /locate/apc atb Tungstophosphoric acid immobilized on ammonium Y and ZSM5 zeolites: Synthesis, characterization and catalytic evaluation Candelaria Leal Marchena a,c , Romina A. Frenzel b,c , Silvina Gomez a,c , Liliana B. Pierella a,c,∗∗ , Luis R. Pizzio b,c,∗ a Grupo Zeolitas – CITeQ (Centro de Investigación y Tecnología Química), Facultad Regional Córdoba, Universidad Tecnológica Nacional, Maestro Lopez esq Cruz Roja Argentina, 5016 Córdoba, Argentina b Centro de Investigación y Desarrollo en Ciencias Aplicadas “Dr.J.J. Ronco” (CINDECA), Departamento de Química, Facultad de Ciencias Exactas, UNLP-CCT La Plata, CONICET, 47 No. 257, 1900 La Plata, Argentina c Conicet (Consejo Nacional de Investigaciones Cientíﬁcas y Técnicas), Argentina a r t i c l e i n f o a b s t r a c t Article history: Two series of materials based on tungstophosphoric acid (TPA) immobilized on NH4Y and NH4ZSM5 Received 6 September 2012 zeolites were prepared by wet impregnation of the zeolite matrix with TPA aqueous solutions. Received in revised form 29 October 2012 Their concentration was varied in order to obtain TPA contents of 5, 10, 20 and 30% (w/w) in the Accepted 3 November 2012 solid. The materials were characterized by N2 adsorption–desorption isotherms, XRD, FT-IR, 31 P MAS- Available online 14 November 2012

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