THE THEORY OF DEVELOPMENT OF SUPPORTED METAL-COMPLEX CATALYSTS
Journal Title: Вісник Одеського національного університету. Хімія - Year 2015, Vol 20, Issue 1
Abstract
Some results of the investigations for the purpose of development of supported metal-complex catalysts for phosphine and carbon monoxide oxidation as well as for ozone decomposition are summarized. The activity of such catalysts has been found to depend not only on a nature of a central atom and ligands but also on a nature of supports. The theoretical model explaining mechanisms of surface complex formation taking into account the influence of physicochemical and structural-adsorption properties of the supports (SiO2, Al2O3, carbon materials, zeolites, dispersed silicas, lamellar aluminosilicates, etc.) has been proposed. For quantitative description of the support effect, such a thermodynamic parameter as the adsorbed water activity assignable with the help of water vapor adsorption isotherms has been introduced. Successive stability constants of the surface metal complexes have been calculated by the kinetic method and, hence, compositions and partial catalytic activity of the latter have been determined. Taking into account the competitive adsorption of metal ions on the supports, some schemes of formation of surface bimetallic complexes have been suggested. The compositions of the supported metal-complex catalysts have been optimized to meet requirements of their use in respirators and plants for air purification from foregoing gaseous toxicants.
Authors and Affiliations
T. L. Rakitskaya
PHYSICOCHEMICAL PROPERTIES OF THE SOLID COMPONENT OF WELDING AEROSOL. I. PHASE COMPOSITION
The phase composition of the solid component of welding aerosol (SCWA) obtained as a result of metal welding with electrodes of ANO-4 and TsL-11 types manufactured according to ISO 2560 E432R 21 and ISO E19.9NbB20 standa...
MODIFICATION OF THE ORGANO-POLYMERIC ANIONITES SURFACE WITH XYLENOL ORANGE BY SORPTION
In this paper, the peculiarities of xylenol orange sorption removal with the help of organopolymeric anion exchangers AB-17-8 and Granion AWA-G1 in the static mode are studied. The state of the matrix and the surface of...
DETERMINATION OF LAURYL GLUTAMIC ACID OF SENSITIZED LUMINESCENCE OF Tb(III) IN COMPLEX WITH CIPROFLOXACIN
Luminescent properties of the complex Tb (III) with ciprofloxacin in micellar solution lauryl glutamic acid was studied . Optimal conditions for formation of a complex set. The dependence of the luminescence intensity on...
INTERACTION OF THE LANTHANA, YTTRIA WITH YTTERBIA AT TEMPERATURE 1500 °C
Phase equilibria in the ternary La2О3–Y2O3–Yb2О3 system at 1500 °C were studied by X–ray diffraction and petrography in the overall concentration range. The samples of different compositions have been prepared from nitra...
SYNTHESIS AND CATALYTIC ACTIVITY OF DISPERSED MANGANESE(IV) OXIDES IN THE REACTION OF OZONE DECOMPOSITION
MnO2 samples were prepared via different procedures: (i) permanganate ion reducing with formic acid followed by the precipitate washing with cold (IS-Mn(1)) or hot (IS-Mn(2)) water, (ii) permanganate ion reducing with Mn...