The catalyst Pt-Ta supported on 7-alumina was prepared by impregnation with solution containing compoundsof II21K1.0. and Ta205 The Pt concentration was kept constant at 0.2 vet% while the concentration of thetantalum was 0,4 wt%. The activity and selectivity of catalyst were determined under conditions at 450-500 °Cand 15-30 atm.. with molar ratio H2/C[H,e5 and WH=1.5mL/h for converted n-hepta...

An alumina-supported nickel catalyst was prepared by impregnation of Ni2+ solution onto mesoporous alumina under microwave irradiation (denoted as M-Ni/Al2O3). For comparison, a catalyst with the same nickel content was prepared by conventional impregnation method (denoted as UM-Ni/Al2O3). Both M-Ni/Al2O3 and UM-Ni/Al2O3 catalysts were applied to the syngas (H2 + CO) production by methane oxy-s...

CSCW (Computer Supported Cooperative Work) is an idea that was demonstrated as early as in the 1960s by Engelbart’s pioneering work on the On-Line System (NLS) [Eng75a], which offered computer-supported conferencing. Since that time, a variety of CSCW applications have been developed at several research laboratories and universities. Education is an inherently cooperative activity involving at ...

Alumina-supported 1 wt. % Pd catalysts were prepared by the deposition precipitation (DP) and impregnation (IMP) methods. The DP catalysts showed higher activity than those of their IMP analogues for decomposition of nitrous oxide. The DRIFTS analysis revealed preferential formation of partially oxidized Pd species on the surface of DP-Cl catalyst. The temperatures at which the peak maxima appe...

Non-supported microporous silica (amorphous) and titania thin films were made by the polymeric gel route. The titania system consisted of particles smaller than 5 nm. Reproducible modification of supported y-alumina films with silica demands a strict control of every modification step. Silica films of 3060 nm thickness on top of and presumably partly inside the y-alumina film were realised. The...

High-energy-resolution fluorescence detection (HERFD) X-ray spectroscopy is presented as a new tool for the identification of the bonding sites of reactants in supported metal catalysts. The type of adsorption site of CO on an alumina-supported platinum catalyst and the orbitals involved in the bonding are identified. Because X-ray absorption spectroscopy (XAS) is element-specific and can be us...