Application of heat-flow calorimetry for developing mathematical models of reactor processes

Sharikov, Yu. V.; Sharikov, F. Yu.; Titov, O. V.

doi:10.1134/s004057951602010x

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…Thus, the kinetic dependencies of sorption processes on zeolite and carbonaceous materials impregnated with substances exhibiting oxidizing properties are approximated by the equations of formal kinetics [13]. However, the contribution of physical and chemisorption to the main sorption process, as well as the effect of desorption of reaction products, remains unclear.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Features of the Hydrogen Sulfide Sorption on the Ferro-Manganese Material

Cheremisina¹,

Черемисина

Ponomareva

et al. 2021

Metals

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The kinetics of hydrogen sulfide sorption by the surface of a ferromanganese material containing in its composition a mixture of iron (II) and (III) oxides FeO × Fe2O3, takanelite (Mn, Ca) Mn4O9 × 3H2O and quartz SiO2, and which is samples of unrefined ferromanganese ore, was studied in this work. Sorption rate constant and activation energy constant values were calculated. The catalytic effect of iron (III) oxide was established, the presence of which in natural material contributes to a decrease in the H2S sorption activation energy. Based on the results of X-ray phase and chromatographic analysis methods, a chemical (redox) reaction of the conversion of hydrogen sulfide into elemental sulfur and H2O was revealed. The overall process rate is expressed in terms of the physical sorption stage and chemical transformation of the components; the influence of the rate of the third stage—reaction products desorption—on the overall rate of the process is taken into account. The limiting stage of the process is determined—a chemical reaction. The relation between the heat and the activation energy of the chemical transformation is used according to the Bronsted—Polanyi rule for catalytic processes. It was found that with an increase in the chemisorption heat, the activation energy of the chemisorption stage decreases and, as a consequence, its rate increases. The sorption process parameters were calculated—the Fe2O3 coverage degree with the initial substances and reaction products providing the maximum sorption rate, which can be a criterion for evaluating the catalytically active sites of the catalyst surface for carrying out catalytic reactions.

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Section: Introductionmentioning

confidence: 99%

Kinetic Features of the Hydrogen Sulfide Sorption on the Ferro-Manganese Material

Cheremisina¹,

Черемисина

Ponomareva

et al. 2021

Metals

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“…Mechanical, hydromechanical, heat and mass transfer processes traditionally belong to the main processes and apparatuses of chemical technologies, while chemical processes and devices in which they take place are distinguished as a special group in which, in addition to the above processes, complex processes of transformation of raw components into reaction products take place. We will dwell on chemical reactors having a wide range of design and mode features which depend on the conditions of the reactions, the rheological characteristics of the reaction masses, the variety of chemical reactions and the methods of influence on the reaction behaviour [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Displacement reactors are devices with an elongated body (channel) providing directional movement and mutual mixing of the reaction mass.…”

Section: Introductionmentioning

confidence: 99%

Sectional automatic adjustment of catalyst layers in gas and liquid phase reactors

Меренцов

Persidskiy²,

Topilin

et al. 2019

MATEC Web Conf.

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The paper provides a new approach to the high-quality implementation of gas-liquid and catalytic gas-and liquid-phase reactions in displacement reactors. The authors have described the scheme and algorithm for automatic control of the parameters of the catalyst layer. The authors have developed algorithms (mode) for automatic adjustment of the hydrodynamic and thermal modes of the catalytic section and also the principle of automatic adjustment of the system to a gradual or impulse adjusting mode which in case of liquid-phase reaction products results in active dispersion and mutual mixing of reaction products and sharp activation of hydrodynamic and diffusion processes. The article also covers the main requirements for elastically deformable catalytic layers and the advantages of using metalworking machines wastes as adjustable catalyst layers which will have a very significant environmental effect within the recycling and remarketing program.

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Self-organization of processes in gas and liquid-phase catalytic reactors

Меренцов

Persidskiy²,

Groshev

et al. 2019

J. Phys.: Conf. Ser.

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The paper provides a system of flexible self-organization of hydrodynamic, thermal and diffusion processes in gas and liquid-phase catalytic reactors the purpose of which is to self-adapt the system to the most qualitative chemical catalytic and gas-liquid reactions and search for the best energy transfer modes (resonant modes). The developed flexible system of self-organization of processes in catalytic and gas-liquid reactors implies using elastically deformable layers of catalysts, both independently made from the required materials (contributing to resonance and effective chemical reactions) and applied on blocks of compressed metal shavings with volumetric-elastic properties. This allows affecting the chemical reactions significantly and also solving a very serious environmental problem of recycling manufacturing wastes since various steel grades being mechanically processed at machine-building enterprises form a huge amount of wastes with various properties and configuration; those block scan undoubtedly be applied as elastically deformable catalyst units in manufacturing.

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Application of heat-flow calorimetry for developing mathematical models of reactor processes

Cited by 4 publications

References 2 publications

Kinetic Features of the Hydrogen Sulfide Sorption on the Ferro-Manganese Material

Kinetic Features of the Hydrogen Sulfide Sorption on the Ferro-Manganese Material

Sectional automatic adjustment of catalyst layers in gas and liquid phase reactors

Self-organization of processes in gas and liquid-phase catalytic reactors

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