caa a22 4500 467889082 CHVBK 20180406152743.0 cr unu---uuuuu 170328e20060801xx s 000 0 eng 10.1007/s11144-006-0148-6 doi (NATIONALLICENCE)springer-10.1007/s11144-006-0148-6 Competitive hydrogenation in binary diene systems on a palladium catalyst [Elektronische Daten] [Jiri Krupka, Zdenek Severa, Josef Pasek] Summary: Hydrogenations of individual C5 dienic substrates (1,3-cyclopentadiene, isoprene, 1,4-pentadiene, cis-1,3-pentadiene, trans-1,3-pentadiene) and their binary mixtures on a heterogeneous palladium catalyst were studied in cyclohexane at 25°C and 2 MPa. Selectivities of the competitive hydrogenations were determined and the substrates relative adsorption coefficients calculated. Effects of the diene structure on their reactivity and the stability of the surface complex are discussed. It was found that differences in selectivity of the competitive hydrogenations of C5 dienes are caused by the difference both in adsorptivity values and in reactivity of adsorbed molecules. The presence of a five-membered ring in the C5 dienes leads, , in significant reduction of surface complex stability as compared with acyclic structures of C5 dienes. On the other hand, it has a very positive effect on the rate of surface reaction. Springer-Verlag/Akadémiai Kiadó, 2006 cis-1 nationallicence palladium nationallicence 3-cyclopentadiene nationallicence 1 nationallicence adsorptivity nationallicence trans-1 nationallicence isoprene nationallicence 3-pentadiene nationallicence 4-pentadiene nationallicence kinetics nationallicence Competitive hydrogenation nationallicence Krupka Jiri Department of Organic Technology, Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic aut Severa Zdenek Department of Organic Technology, Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic aut Pasek Josef Department of Organic Technology, Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic aut Reaction Kinetics and Catalysis Letters Kluwer Academic Publishers 89/2(2006-08-01), 359-368 0133-1736 89:2<359 2006 89 11144 https://doi.org/10.1007/s11144-006-0148-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11144-006-0148-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Krupka Jiri Department of Organic Technology, Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic aut NATIONALLICENCE 700 1- Severa Zdenek Department of Organic Technology, Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic aut NATIONALLICENCE 700 1- Pasek Josef Department of Organic Technology, Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic aut NATIONALLICENCE 773 0- Reaction Kinetics and Catalysis Letters Kluwer Academic Publishers 89/2(2006-08-01), 359-368 0133-1736 89:2<359 2006 89 11144 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer