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Article
Methane conversion into aromatic hydrocarbons over Ag-Mo/ZSM-5 catalysts
Nonoxidative methane conversion into aromatic hydrocarbons over ZSM-5-type high-silica zeolites modified with nanosized powders of molybdenum (4.0 wt %) and silver (0.1–0.5 wt %) is reported. The acidic proper...
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Article
Hydrocracking of vacuum gas oil in the presence of supported nickel-tungsten catalysts
The supports containing 70% Al2O3 and 30% β zeolite (AZ-1 and AZ-2), which differed in mixing procedures, and the Ni-W/AZ-1 and Ni-W/AZ-2 catalysts were characterized using an adsorption technique, high-resolutio...
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Article
Low-temperature oxidation of carbon monoxide on Pd(Pt)/CeO2 catalysts prepared from complex salts
Catalysts containing cerium oxide as a support and platinum and palladium as active components for the low-temperature oxidation of carbon monoxide were studied. The catalysts were synthesized in accordance wi...
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Article
Effect of the reaction medium on the structure of the La1 − x Ca x MnO3 (x = 0–1) solid solutions prepared by the pechini method
The phase composition and microstructure of La1 − x Ca x MnO3 (x = 0–1) materials prepared by the Pechini method from polymer-salt stocks were studied aft...
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Article
Effect of chromium content on the properties of a microspherical alumina-chromium catalyst for isobutane dehydrogenation prepared with the use of a centrifugal thermal activation product of gibbsite
The states of chromium in both promoted and unpromoted alumina-chromium catalysts with various chromium contents prepared with the use of a centrifugal thermal activation product of gibbsite were studied in de...
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Article
Growth of carbon nanotubes from butadiene on a Fe-Mo-Al2O3 catalyst
The MoO3-Fe2O3-Al2O3 catalysts were prepared from metal nitrates using a coprecipitation method. It was found that the modification of an alumina-iron catalyst with molybdenum oxide resulted in the formation of a...
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Article
Effect of preparation procedure on the properties of CeO2
The effect of preparation procedure on the physicochemical and catalytic properties of CeO2 was studied. Differences in the electronic and structural characteristics of CeO2 depending on preparation procedure and...
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Article
Synthesis and physicochemical characterization of palladium-cerium oxide catalysts for the low-temperature oxidation of carbon monoxide
The effect of CeO2 preparation procedure on the electronic and structural states of the active component of Pd/CeO2 catalysts and their activity in the low-temperature reaction of CO oxidation was studied. The fo...
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Article
Platinum nanoparticle size effect on specific catalytic activity in n-alkane deep oxidation: Dependence on the chain length of the paraffin
The specific activity of 0.8% Pt/Al2O3 catalysts in the deep oxidation of C1–C6 n-alkanes increases with an increase in the Pt particle size from 1 to 3–4 nm. Further coarsening of the par...
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Article
Synthesis of homogeneous La1 − x Ca x MnO3 solid solutions by the Pechini method and their activity in methane oxidation
Homogeneous La1 − x Ca x MnO3 solid solutions have been synthesized by the Pechini method (using polymer-solid compositions). Their microstructure, stabil...
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Article
New approaches to the preparation of highly efficient chromium-containing oxide catalysts for the water gas shift reaction
It was found experimentally that the solutions of Cr3+ nitrate and the nitrates of other metals that are the constituents of Cr-containing catalysts can be prepared by dissolving a corresponding metal (for exampl...
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Article
Nonoxidative conversion of methane into aromatic hydrocarbons on Ni-Mo/ZSM-5 catalysts
The nonoxidative conversion of methane into aromatic hydrocarbons on high-silica zeolites ZSM-5 containing nanosized powders of molybdenum (4.0 wt %) and nickel (0.1–2.0 wt %) was studied. Data on the acid cha...
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Article
Deactivation of a Zn/TiO2 catalyst in the course of methanol steam reforming in a microchannel reactor
The service life tests of a Zn/TiO2 catalyst deposited on the microchannel plates of copper foam, nickel foam, and corrugated brass foil in the process of methanol steam reforming demonstrated that the catalyst s...
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Article
Catalytic properties of platinum-promoted acid cesium salts of molybdophosphoric and molybdovanadophosphoric heteropoly acids in the gas-phase oxidation of benzene to phenol with an O2 + H2 mixture
Acid salts Cs x H3 + n − x PMo12 − n V n O40 (n = 0, 1, 2, or 3; x = 2.5 or 3.5) with coprecipit...
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Article
Catalytic synthesis of nanosized feathery carbon structures via the carbide cycle mechanism
The morphology of carbon nanostructures obtained by 1,2-dichloroethane decomposition on the 90% Ni/Al2O3 catalyst under different reaction conditions was studied by high-resolution transmission electron microscop...
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Article
Effect of the basic surface sites of carbons on the degree of dispersion of platinum catalysts prepared by H2PtCl6 adsorption
In the synthesis of Pt/C catalysts via H2PtCl6 adsorption onto a carbon support, NH4Cl can be formed catalytically during the reduction of the precursor with H2 at 250°C. This compound favors the sintering of met...
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Article
Influence of the texture and acid-base properties of the alumina-containing support on the formation of Co(Ni)-Mo catalysts for deep hydrodesulfurization of the diesel fraction
The influence of the texture of γ-Al2O3 on the formation of Co(Ni)-Mo catalysts for hydrodesulfurization of the diesel fraction is studied. As shown by low-temperature N2 adsorption, X-ray diffraction, IR spectro...
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Article
Evolution of Cu-Zn-Si oxide catalysts in the course of reduction and reoxidation as studied by in situ X-ray diffraction analysis, transmission electron microscopy, and magnetic susceptibility methods
The reduced and reoxidized Cu-Zn-Si oxide catalysts as layered copper-zinc hydroxo silicates with the zincsilite structure were studied using in situ and ex situ X-ray diffraction analysis, transmission electr...
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Article
Sorbents and supports based on nanoporous carbon xerogels
The physicochemical properties of nanoporous carbon materials (TUMaNs) prepared by the carbonization of porous phenol-formaldehyde resin were studied. According to high-resolution electron microscopic data, th...
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Article
Nickel catalysts based on porous nickel for methane steam reforming
The influence of synthesis conditions on the phase composition and texture of porous nickel supports as plates with a magnesium oxide underlayer were investigated by X-ray diffraction, low-temperature nitrogen...