caa a22 4500 463253701 CHVBK 20180405153348.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10562-007-9152-3 doi (NATIONALLICENCE)springer-10.1007/s10562-007-9152-3 Propane Reactions over Faujasite Structure Zeolites Type-X and USY: Effect of Zeolite Silica over Alumina Ratio, Strength of Acidity and Kind of Exchanged Metal Ion [Elektronische Daten] [Theodoros Katranas, Konstantinos Triantafyllidis, Athanasios Vlessidis, Nicholaos Evmiridis] In this work we prepared various zeolite-X and USY samples partially exchanged with copper, iron and platinum. These samples were characterized by XRD, Chemical Analysis, SEM-EDS, N2-adsorption-desorption, ammonia-TPD, and tested as catalysts in high temperature (400 and 550°C) propane transformation. The obtained results revealed the strong effect of Si/Al ratio in faujasite zeolite structure, the number and strength of acid sites and of the presence of different metal ions in countered ion sites, on the catalytic activity and selectivity of zeolite-X and USY. The highest propane dehydrogenation activity was achieved with the platinum-exchanged X zeolite (∼11.2% propylene yield, ∼31% selectivity). On the contrary USY zeolites showed high cracking capability and relatively low dehydrogenation activity excepting the platinum-exchanged sample which yielded notably high aromatization products. Springer Science+Business Media, LLC, 2007 Propane nationallicence Catalysis nationallicence Dehydrogenation nationallicence Cracking nationallicence Zeolites type-X and USY nationallicence Katranas Theodoros Department of Chemistry, University of Ioannina, 451 10, Ioannina, Greece aut Triantafyllidis Konstantinos Department of Chemistry, Aristotle University of Thessaloniki, University Campus, P.O. Box 116, 541 24, Thessaloniki, Greece aut Vlessidis Athanasios Department of Chemistry, University of Ioannina, 451 10, Ioannina, Greece aut Evmiridis Nicholaos Department of Chemistry, University of Ioannina, 451 10, Ioannina, Greece aut Catalysis Letters Springer US; http://www.springer-ny.com 118/1-2(2007-10-01), 79-85 1011-372X 118:1-2<79 2007 118 10562 https://doi.org/10.1007/s10562-007-9152-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10562-007-9152-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Katranas Theodoros Department of Chemistry, University of Ioannina, 451 10, Ioannina, Greece aut NATIONALLICENCE 700 1- Triantafyllidis Konstantinos Department of Chemistry, Aristotle University of Thessaloniki, University Campus, P.O. Box 116, 541 24, Thessaloniki, Greece aut NATIONALLICENCE 700 1- Vlessidis Athanasios Department of Chemistry, University of Ioannina, 451 10, Ioannina, Greece aut NATIONALLICENCE 700 1- Evmiridis Nicholaos Department of Chemistry, University of Ioannina, 451 10, Ioannina, Greece aut NATIONALLICENCE 773 0- Catalysis Letters Springer US; http://www.springer-ny.com 118/1-2(2007-10-01), 79-85 1011-372X 118:1-2<79 2007 118 10562 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer