caa a22 4500 477080782 CHVBK 20180405111449.0 cr unu---uuuuu 170330e19960801xx s 000 0 eng 10.1007/BF02113854 doi (NATIONALLICENCE)springer-10.1007/BF02113854 Effect of alkali metals additives to V2O5/TiO2 catalyst on physicochemical properties and catalytic performance in oxidative dehydrogenation of propane [Elektronische Daten] [R. Grabowski, B. Grzybowska, A. Kozłowska, J. Słoczyński, K. Wcisło, Y. Barbaux] The effect of alkali metal additives Li, K, and Rb to V2O5/TiO2 catalyst on the rate of catalyst reduction with propane and reoxidation with oxygen, sorption of propene, and the electron work function has been examined. The results have been correlated with the catalytic performance in oxidative dehydrogenation, ODH, of propane. It has been found that the rates of reduction, reoxidation and the ODH of propane decrease in the order: VTi>LiVTi>KVTi>RbVTi. The activation energies of the reduction and reoxidation are not, however, affected by the presence of the alkali metals. The same sequence has been observed for the work function values of the catalysts. It is argued that alkali metal poisons the centres of the hydrocarbon activation. The yield and selectivity to propene in the ODH of propane increase, however, for the promoted catalysts, following the above sequence. This effect is ascribed to the decrease in the heat of the propene adsorption, which is due to the increase in the basicity and decrease in acidity on the promoted catalysts. J.C. Baltzer AG, Science Publishers, 1996 vanadia-titania catalyst nationallicence oxidative dehydrogenation of propane nationallicence alkali promoters nationallicence Grabowski R. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland aut Grzybowska B. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland aut Kozłowska A. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland aut Słoczyński J. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland aut Wcisło K. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland aut Barbaux Y. Faculté des Sciences Jean Perrin, Université d'Artois, 62307, Lens, France aut Topics in Catalysis Baltzer Science Publishers, Baarn/Kluwer Academic Publishers 3/3-4(1996-08-01), 277-288 1022-5528 3:3-4<277 1996 3 11244 https://doi.org/10.1007/BF02113854 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02113854 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Grabowski R. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland aut NATIONALLICENCE 700 1- Grzybowska B. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland aut NATIONALLICENCE 700 1- Kozłowska A. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland aut NATIONALLICENCE 700 1- Słoczyński J. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland aut NATIONALLICENCE 700 1- Wcisło K. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland aut NATIONALLICENCE 700 1- Barbaux Y. Faculté des Sciences Jean Perrin, Université d'Artois, 62307, Lens, France aut NATIONALLICENCE 773 0- Topics in Catalysis Baltzer Science Publishers, Baarn/Kluwer Academic Publishers 3/3-4(1996-08-01), 277-288 1022-5528 3:3-4<277 1996 3 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer