Search Results - "Dedecek, J."

Siting and Distribution of Framework Aluminium Atoms in Silicon-Rich Zeolites and Impact on Catalysis by DEDECEK, J, SOBALIK, Z, WICHTERLOVA, B

“…Siting of Al atoms in the framework T sites, in zeolite rings and channel/cavity system, and the distribution of Al atoms between single Al atoms and close Al…”
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Proton proximity – New key parameter controlling adsorption, desorption and activity in propene oligomerization over H-ZSM-5 zeolites by Bernauer, M., Tabor, E., Pashkova, V., Kaucký, D., Sobalík, Z., Wichterlová, B., Dedecek, J.

“…[Display omitted] •The distances of protons in H-ZSM-5 represent a new parameter in acid catalyzed reactions.•Al atoms (H+) predominated at the channel…”
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The decisive role of the distribution of Al in the framework of beta zeolites on the structure and activity of Co ion species in propane-SCR-NOx in the presence of water vapour by CAPEK, L, DEDECEK, J, SAZAMA, P, WICHTERLOVA, B

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Control of metal ion species in zeolites by distribution of aluminium in the framework: From structural analysis to performance under real conditions of SCR-NOx and NO, N2O decomposition by Dědeček, J., Čapek, L., Sazama, P., Sobalík, Z., Wichterlová, B.

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Role of the morphology and the dehydroxylation of metakaolins on geopolymerization by Medri, V., Fabbri, S., Dedecek, J., Sobalik, Z., Tvaruzkova, Z., Vaccari, A.

“…Two commercial metakaolins were tested during partial geopolymerization with potassium silicate in order to emphasize the different surface reactivities. Both…”
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SiC-based refractory paints prepared with alkali aluminosilicate binders by Medri, V., Fabbri, S., Ruffini, A., Dedecek, J., Vaccari, A.

“…Refractory paints based on silicon carbide (SiC) were developed using inorganic alkali aluminosilicates binders. In order to optimize the binders, different…”
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Siting and Distribution of the Co Ions in Beta Zeolite: A UV–Vis–NIR and FTIR Study by Dedecek, J

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Ag-ZSM-5 zeolite as high-temperature water-vapor sensor material by Sazama, P., Jirglová, H., Dědeček, J.

“…The effect of the presence of water vapor in the gas stream on the absorption spectra of AgH-ZSM-5 zeolites at high temperatures was investigated using UV–Vis…”
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Adsorption of NO in Fe2+-Exchanged Ferrierite. A Density Functional Theory Study by Benco, L, Bucko, T, Grybos, R, Hafner, J, Sobalik, Z, Dedecek, J, Hrusak, J

“…The properties of Fe-exchanged ferrierite were investigated by ab initio periodic DFT calculations. Stabilities of Al/Si substitutions were compared for all…”
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Multiple Adsorption of NO on Fe2+ Cations in the α- and β-Positions of Ferrierite:  An Experimental and Density Functional Study by Benco, L, Bucko, T, Grybos, R, Hafner, J, Sobalik, Z, Dedecek, J, Sklenak, S, Hrusak, J

“…Adsorption of NO on Fe-exchanged ferrierite is investigated by Fourier transform infrared (FTIR) spectroscopy and ab initio periodic density functional theory…”
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Co2+ ion siting in pentasil-containing zeolites. II. Co2+ ion sites and their occupation in ferrierite. A VIS diffuse reflectance spectroscopy study by KAUCKY, D, DEDECEK, J, WICHTERLOVA, B

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Effect of aluminium distribution in the framework of ZSM-5 on hydrocarbon transformation. Cracking of 1-butene by Sazama, P., Dědeček, J., Gábová, V., Wichterlová, B., Spoto, G., Bordiga, S.

“…The effect of the distribution of Al atoms in the framework of H-ZSM-5, controlled by zeolite synthesis, on the product yields in 1-butene conversion to low…”
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Discoloration of Fired Kaolinitic Clays (Study of Fe3+ Coordination by Mössbauer and UV-ViS-NIR Spectroscopy) by Hanzlicek, T., Niznansky, D., Dedecek, J., Steinerova, M., Straka, P., Triskova, J.

“…The final color of a ceramic body is generally determined by the contents of Fe3+ ions. The Central European market accepts kaolinitic clays for the production…”
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Siting of the Cu + ions in dehydrated ion exchanged synthetic and natural chabasites: a Cu + photoluminescence study by DEDECEK, J, WICHTERLOVA, B, KUBAT, P

“…Cu + emission spectra of Cu 2+ ion exchanged and reduced natural and synthetic CuNa-, CuCa-, CuCs- and CuBa-chabasites were used to identify cationic sites of…”
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Cu ion siting in high silica zeolites. Spectroscopy and redox properties by WICHTERLOVA, B, SOBALIK, Z, DEDECEK, J

“…It has been shown that two main Cu sites present in ion exchanged Cu-ZSM-5 which differ in positive charges on the Cu 2+ ion, exhibit substantially different…”
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Enhancement of decane-SCR-NOx over ag/alumina by hydrogen. reaction kinetics and in situ FTIR and UV-vis study by SAZAMA, P, CAPEK, L, DROBNA, H, SOBALIK, Z, DEDECEK, J, ARVE, K, WICHTERLOVA, B

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Synthesis and Characterization of CoSBA-1 Cubic Mesoporous Molecular Sieves by Vinu, A, Dědeček, J, Murugesan, V, Hartmann, M

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Siting and Distribution of the Co Ions in Beta Zeolite: A UV–Vis–NIR and FTIR Study by DEDECEK, J, CAPEK, L, KAUCKY, D, SOBALIK, Z, WICHTERLOVA, B

“…The Co(II) ion sites in dehydrated beta zeolites, consisting of polymorphs A, B, and C, were identified using an approach based on a similarity between visible…”
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Analysis of the state and size of silver on alumina in effective removal of NOx from oxygen rich exhaust gas by Arve, K, Klingstedt, F, Eränen, K, Murzin, D Yu, Capek, L, Dedecek, J D, Sobalik, Z, Wichterlová, B, Svennerberg, K, Wallenberg, L R, Bovin, J O

“…Ag/alumina catalysts with different silver contents for octane-SCR were prepared by impregnation and incipient wetness methods. Activity tests revealed that…”
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Analysis of Fe species in zeolites by UV–VIS–NIR, IR spectra and voltammetry. Effect of preparation, Fe loading and zeolite type by Čapek, L., Kreibich, V., Dědeček, J., Grygar, T., Wichterlová, B., Sobalík, Z., Martens, J.A., Brosius, R., Tokarová, V.

“…Three procedures were employed for the preparation of Fe-zeolites with ZSM-5 (MFI), ferrierite (FER) and beta (BEA) structures: ion exchange from FeCl 3…”
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