Registration Number
0221U105136,
0115U003914
, R & D reports
Title
Physicochemical foundation of selection of natural and synthetic supports for metal-complex catalysts intended for redox reactions with participation of ozone, carbon monoxide, and sulfur dioxide
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Head
Rakytska Tetiana L., Доктор хімічних наук
Registration Date
07-06-2021
Organization
Odessa I. I. Mechnikov National University
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In the work for the first time, some conditions for activation of Ukrainian natural sorbents and their use as supports in the metal complex catalytic compositions have been grounded. The chemisorptions-catalytic mechanism of sulfur dioxide absorption by clinoptilolite (H-CLI-1) modified with copper(II) chloride has been founded. Sorption and protection parameters of monometallic compositions, MiClj/N-CLI (M = Cu(II), Cо(II), Fe(III), Mn(II), Cd(II)), in the process of sulfur dioxide chemisorptions-catalytic oxidation with air oxygen have been determined. Long-time tests of the catalyst for carbon monoxide oxidation, К2PdCl4-Cu(NO3)2-КBr/Н-CLI-0.5, showed that its activity decreased from 95 % to 53 % in the presence of sulfur dioxide. The data concerning CO protection properties of copper-palladium complexes anchored on natural (N-Tr(K)) and modified (300-Tr(K) and H2O-Tr(K)) tripolis showed a higher activity of the latter. Kinetic investigations of some catalytic compositions for low-temperature ozone decomposition showed that their activity depended on the 3d metal nature and decreased in the orders Co(II) > Mn(II) >> Cu(II) and Mn(II) > Cо(II) > Cu(II).for MCl2/N-BT(1)* and MCl2/N-Bent, respectively. It has been found that, on the surface of synthetic materials (SM) such as alumogel ( -Al2O3), silica gels (KSNG and KSK), and synthetic zeolites (KA, NaA, and NaX), the ion-exchange mechanism of metal complex catalyst formation is realised. Values of an absorbing capacity of SO2 by synthetic zeolites decrease in the order NaX > NaA > KA, and modification of them with solutions of MСl2 (M = Сu(II), Co(II), Mn(II)) results in substantial increase in amounts of sulphur dioxide absorbed. Protection and sorption parameters of MCl2/SMs depend on the nature of both metals and supports. Oxide forms of iron (?-, ?-Fe2O3, ?-, ?-FeOOH and their mixtures) and manganese (MnO2 and Mn2O3) both dispersed and anchored on CLI and SiO2 were synthesized by different methods at differe
Product Description
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Kiose Tatyana O
Raskola Ludmila A
Truba Alla Sergeevna
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2021-06-07
