40 Result(s)

Article

Low-Temperature Conversion of ortho-Hydrogen to para-Hydrogen over Ni/Al₂O₃ Supported Catalysts

Comparative studies of Ni/Al₂O₃ catalysts during the low-temperature conversion of ortho-hydrogen to para-hydrogen are performed. Industrial alumina of A-64 grade, obtained via precipitation (OAPP-1), and alumina...

A. V. Zhuzhgov, O. P. Krivoruchko, L. A. Isupova in Russian Journal of Physical Chemistry A (2020)

Article

Synthesis of Highly Dispersed 2D Aluminum Cobalt Oxyhydroxide Compounds Based on Microwave-Activation Products of Crystalline Gibbsite

We have studied interaction between the microwave activation product of gibbsite and an aqueous cobalt nitrate solution at room temperature, atmospheric pressure, and pH 8.0 ± 0.3. The results demonstrate that...

A. V. Zhuzhgov, O. P. Krivoruchko, T. V. Larina, A. V. Ishchenko… in Inorganic Materials (2019)

Article

Low-Temperature Conversion of ortho-Hydrogen into Liquid para-Hydrogen: Process and Catalysts. Review

The present review is devoted to some problems of the production of liquid para-hydrogen by catalytic ortho-para conversion (OPC) of molecular hydrogen at cryogenic temperatures, the catalysts of this process, an...

A. V. Zhuzhgov, O. P. Krivoruchko, L. A. Isupova, O. N. Mart’yanov… in Catalysis in Industry (2018)

Article

Sol–gel synthesis of 2D and 3D nanostructured YSZ:Yb³⁺ ceramics

This paper presents results of a detailed study of fundamental aspects of the formation of 2D and 3D nanostructured YSZ:Yb³⁺ ceramics with a cubic structure through a key synthesis step in aqueous solutions of zi...

O. P. Krivoruchko, T. V. Larina, A. V. Ishchenko, E. V. Pestryakov… in Inorganic Materials (2017)

Article

New approach to the novel synthesis of boehmite (γ-AlOOH) by microwave irradiation of gibbsite: Kinetics of solid-phase reactions and dielectric properties of the reactants

Microwave irradiation of gibbsite is suggested as a method of obtaining crystalline boehmite. The kinetics of solid-state transformations of gibbsite under microwave radiation has been investigated, and the di...

O. P. Krivoruchko, A. V. Zhuzhgov, V. A. Bolotov, Yu. Yu. Tanashev… in Catalysis in Industry (2014)

Article

Regularities of Lewis site formation upon the microwave irradiation of gibbsite-γ-Al(OH)₃

Spatially separated Lewis acidic and basic sites can be formed upon the microwave irradiation of gibbsite. This is demonstrated by IR spectroscopy and indicates the possibility of the selective activation of c...

A. V. Zhuzhgov, E. A. Paukshtis… in Russian Journal of Physical Chemistry A (2013)

Article

Appearance of absorption in the visible range in the microwave-induced dielectric gibbsite

O. P. Krivoruchko, A. V. Zhuzhgov, T. V. Larina, V. N. Parmon in Doklady Physical Chemistry (2013)

Article

Unusual bulk amorphization of gibbsite into atomic size aluminum-oxygen complexes occurring within initial microcrystals under microwave radiation

O. P. Krivoruchko, A. V. Zhuzhgov, D. F. Khabibulin… in Doklady Physical Chemistry (2012)

Article

Distribution of copper- and nickel-containing modifier components in the pore space of HZSM-5 zeolite

The distribution of copper- and nickel-containing components in the pore space of HZSM-5 zeolite was quantitatively studied. It was found that the detailed distribution of a modifier in the micropore and mesop...

V. Yu. Gavrilov, O. P. Krivoruchko, T. V. Larina, I. Yu. Molina… in Kinetics and Catalysis (2010)

Article

Detection of uncommon ordering of Cu²⁺ ions in the zeolite Cu(n)ZSM-5 pore space by EPR and electronic diffuse reflectance spectroscopy

O. P. Krivoruchko, N. T. Vasenin, T. V. Larina… in Doklady Physical Chemistry (2010)

Article

Synthesis, electronic state, and particle size stabilization of nanoparticulate [Co(OH)₂(H₃O) _δ ⁺ ]^δ+

We have synthesized nanoparticulate cobalt(II) hydroxide containing Co²⁺ in tetrahedral oxygen coordination (Co _Td ²⁺ ), atypi...

O. P. Krivoruchko, T. V. Larina, V. F. Anufrienko, I. Yu. Molina… in Inorganic Materials (2009)

Article

Synthesis and mesopore-micropore structure characterization of nanodisperse Fe³⁺ hydrogels (xerogels)

A preparation procedure was developed, and samples of nanodisperse Fe³⁺ hydroxide with a narrow particle-size distribution (2.5–3.5 nm) were synthesized. The occurrence of a substructure in the bulk of Fe³⁺ hydro...

V. Yu. Gavrilov, O. P. Krivoruchko in Kinetics and Catalysis (2009)

Article

Distribution of the cobalt-containing component in the pore space of HZSM-5 upon a postsynthetic modification of the zeolite with hydroxo compounds of Co²⁺

The distribution of the cobalt-containing modifying component in the pore space of zeolite HZSM-5 depending on the total cobalt content of the samples (0.5–5.0 wt %) was quantitatively studied for the first ti...

O. P. Krivoruchko, V. Yu. Gavrilov, I. Yu. Molina, T. V. Larina in Kinetics and Catalysis (2008)

Article

Conversion of dimethyl disulfide in the presence of zeolites

Dimethyl disulfide conversion in the presence of zeolites was studied at atmospheric pressure and T = 190–350°C. For all catalysts, the products of the reaction at T = 190°C—methanethiol, dimethyl sulfide, and hy...

A. V. Mashkina, E. A. Paukshtis, O. P. Krivoruchko… in Kinetics and Catalysis (2008)

Article

Laser-induced luminescence of model Fe/Al₂O₃ and Cr/Al₂O₃ catalysts

The laser-induced luminescence of Cr³⁺ impurity ions in model Fe/Al₂O₃ and Cr/Al₂O₃ catalysts with different calcination temperatures was studied. It was found that an additional luminescence band at 770 nm appea...

V. N. Snytnikov, V. O. Stoyanovskii, T. V. Larina… in Kinetics and Catalysis (2008)

Article

Activity of cobalt sulfide catalysts in the hydrogenolysis of dimethyl disulfide to methanethiol: Effects of the nature of a support and the procedure of supporting a cobalt precursor

The conversion of dimethyl disulfide to methanethiol on various catalysts containing supported cobalt sulfide in an atmosphere of hydrogen was studied at atmospheric pressure and T = 190°C. On CoS introduced into...

A. V. Mashkina, O. P. Krivoruchko, L. N. Khairulina in Kinetics and Catalysis (2008)

Article

Stabilization of Co²⁺ and Cu²⁺ by Extraframework Aluminum Ions in HZSM-5 Zeolite Channels

O. P. Krivoruchko, V. F. Anufrienko, E. A. Paukshtis… in Doklady Physical Chemistry (2004)

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)

Chapter

Use of Modern Composite Materials of the Chemical Heat Accumulator Type for Fire Protection and Fire Extinguishing

For the last two decades, a huge amount of work has been done on develo** efficient systems for absorbing excessive heat. This activity was mainly addressed to conventional applications for accumulation and ...

V. N. Parmon, O. P. Krivoruchko… in Prevention of Hazardous Fires and Explosions (1999)

Article

New low waste and energy saving technology for supports and catalysts production: Electron beam activation of oxygen containing solid compounds

We present the know-how of fundamentally new low-waste and energy saving support and catalyst production. High-energy electron beam activation of initial substances forms the basis of this technology. We repor...

O. P. Krivoruchko, Yu. Yu. Tanashev… in Reaction Kinetics and Catalysis Letters (1995)