18 Result(s)

Article

Study of leaching of sodium aluminosilicate fiberglass materials

The effects of temperature, time, and the composition of the solvent (water, HCl) on the processes of leaching of Na, Al, and Ca from sodium aluminosilicate fiberglass materials and also the physicochemical pr...

L. G. Simonova, E. A. Paukshtis, L. S. Dovlitova… in Russian Journal of Inorganic Chemistry (2015)

Article

Influence of heat treatment conditions on the physicochemical and catalytic properties of a chromium-containing catalyst for tetrachloroethylene hydrofluorination to pentafluoroethane

The physicochemical properties of coprecipitated 95% Cr₂O₃-5% Al₂O₃ oxide systems obtained by heat treatment of the precursor in nitrogen and air between 110 and 600°C and their influence on the catalytic activit...

L. G. Simonova, A. A. Zirka, S. I. Reshetnikov, T. V. Larina… in Kinetics and Catalysis (2011)

Article

Synthesis of ozone-safe freons and methods for improving the Russian industrial catalyst for their production

Industrially important reactions of gas-phase synthesis of ozone-safe freons of the ethane family-hydrofluorination of perchloroethylene into pentafluoroethane (Halocarbon-125) and trichloroethylene into 1,1,1...

I. G. Trukshin, V. G. Barabanov, V. N. Novgorodov, A. A. Zirka… in Catalysis in Industry (2010)

Article

Direct catalytic oxidation of methane to formaldehyde: New investigation opportunities provided by an improved flow circulation method

An improved flow circulation reactor with reaction mixture quenching was used to study the direct oxidation of methane to formaldehyde at 600–770°C, a CH₄/O₂ volume ratio of 1: 1 in the starting mixture, and gas ...

I. I. Bobrova, N. N. Bobrov, L. G. Simonova, V. N. Parmon in Kinetics and Catalysis (2007)

Article

Isotope exchange between NO and H₂O on a platinum-containing catalyst based on fiberglass

The dynamics of ¹⁸O isotope exchange between NO or H₂O and a catalyst and the dynamics of ¹⁸O label transfer from NO to H₂O have been studied under conditions of sorption-desorption equilibrium. The occurrence of...

E. M. Sadovskaya, A. P. Suknev, A. V. Toktarev, L. G. Simonova… in Kinetics and Catalysis (2006)

Article

Catalysts Based on Fiberglass Supports: V. Absorption and Catalytic Properties of Palladium Catalysts Based on a Leached Silica-Fiberglass Support in the Selective Hydrogenation of an Ethylene–Acetylene Mixture

The absorption and catalytic properties of palladium catalysts (0.01% Pd) based on leached soda–silica fiberglass supports were studied in the selective hydrogenation of acetylene as the constituent of an ethy...

B. S. Bal'zhinimaev, V. V. Barelko, A. P. Suknev, E. A. Paukshtis… in Kinetics and Catalysis (2002)

Article

Catalysts Based on Fiberglass Support: IV. Platinum Catalysts Based on Fiberglass Support in Oxidation of Hydrocarbons (Propane and n-Butane) and Sulfur Dioxide

Platinum catalysts (0.003–0.52% Pt) based on leached sodium silicate and boron silicate fiberglass supports are studied in the complete oxidation of hydrocarbons (n-butane and propane) and high-temperature SO₂ ox...

L. G. Simonova, V. V. Barelko, A. V. Toktarev, A. F. Chernyshov… in Kinetics and Catalysis (2002)

Article

Catalysts Based on Fiberglass Supports: II. Physicochemical Properties of Alumina Borosilicate Fiberglass Supports

The properties of borosilicate fiberglass supports were studied using a set of physicochemical techniques (BET; transmission electron microscopy; IR spectroscopy; and ¹¹B, ²³Na, ²⁷Al, and ²⁹Si NMR spectroscopy). ...

L. G. Simonova, V. V. Barelko, E. A. Paukshtis, O. B. Lapina… in Kinetics and Catalysis (2001)

Article

Catalysts Based on Fiberglass Supports: III. Properties of Supported Metals (Pt and Pd) According to Electron-Microscopic and XPS Data

Under various preparation conditions, metals supported on leached borosilicate and soda–silica fiberglass form three types of particles. First, these are metal particles in sizes from tens to hundreds of angst...

L. G. Simonova, V. V. Barelko, A. V. Toktarev, V. I. Zaikovskii… in Kinetics and Catalysis (2001)

Article

Catalysts Based on Fiberglass Supports: I. Physicochemical Properties of Silica Fiberglass Supports

The physicochemical properties and structure of supports prepared by leaching soda–silica fiberglass materials were studied using a set of physicochemical techniques (BET; IR spectroscopy; transmission electro...

L. G. Simonova, V. V. Barelko, O. B. Lapina, E. A. Paukshtis… in Kinetics and Catalysis (2001)

Article

The Structure of the VO_x Oxo complexes on the surface of the Al₂O₃ of various structural modifications

The structure of the surface VO_x oxo complexes prepared by deposition from aqueous solutions on alumina in various modifications (γ, η, χ, θ, and δ) is studied using⁵¹V and¹H NMR. The crystal structure and acidic...

L. G. Simonova, O. B. Lapina, O. P. Krivoruchko, V. V. Terskikh in Kinetics and Catalysis (2000)

Article

¹²⁹Xe NMR: Porous-structure of silica gels

¹²⁹Xe NMR has been used to study the pore structure of several commercial silicas. They have been shown to possess micropores of 5–10 Å size. Micropores of different type appear not to be connected directly. A m...

V. V. Terskikh, I. L. Mudrakovskii… in Reaction Kinetics and Catalysis Letters (1993)

Article

Quadratic error of an unbiased estimate of the probability density of sufficient statistics of the normal distribution

R. A. Abdulev, L. G. Simonova in Journal of Soviet Mathematics (1988)

Article

Influence of porous support structure and active component composition on deactivation of vanadium catalysts in SO₂ oxidation

The effect of porous support structure and active component composition of vanadium catalysts on the crystallization character of this component has been studied in SO₂ oxidation at low temperatures and conversio...

N. P. Belyaeva, B. S. Balzhinimaev… in Reaction Kinetics and Catalysis Letters (1986)

Article

¹⁷O and⁵¹V NMR studies of complex formation in K₂S₂O₇·nV₂O₅ during catalytic oxidation of SO₂

¹⁷O and⁵¹V NMR spectra of K₂S₂O₇·nV₂O₅ melts and catalysts for SO₂ oxidation during a catalytic reaction have been examined.

V. M. Mastikhin, O. B. Lapina, L. G. Simonova in Reaction Kinetics and Catalysis Letters (1984)

Article

⁵¹V-,²⁹Si- and²⁷Al-NMR studies of the interaction of active component of vanadium catalysts for SO₂ oxidation with supports

NMR studies have revealed that silicas and aluminosilicates interact with the active components of vanadium catalysts, in the former case merely yielding surface compounds.

V. M. Mastikhin, O. B. Lapina, L. G. Simonova in Reaction Kinetics and Catalysis Letters (1984)

Article

Effect of type and content of alkaline promoters on the properties of vanadium catalysts for SO₂ oxidation

The substitution of 30–50% potassium promoter by sodium in vanadium catalysts for SO₂ oxidation is shown to increase significantly their activity at low temperatures and conversions of SO₂. ESR studies indicate t...

L. G. Simonova, O. B. Lapina, V. M. Mastikhin… in Reaction Kinetics and Catalysis Letters (1983)

Article

Studies of vanadium catalysts for sulfur dioxide oxidation by⁵¹V-NMR

Studies of the⁵¹V-NMR spectra of a series of industrial catalysts and systems modelling the active catalyst component indicate that the catalyst composition depends on the preparation method and during thermal tr...

V. M. Mastikhin, O. B. Lapina, V. F. Lyakhova… in Reaction Kinetics and Catalysis Letters (1981)