O. Korobeinichev - Academia.edu (original) (raw)
Papers by O. Korobeinichev
Russian Journal of Physical Chemistry B, 2008
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The work is devoted to the detailed kinetic analysis of the unusual influence of the additives of... more The work is devoted to the detailed kinetic analysis of the unusual influence of the additives of organophosphorus compounds (OPC) on speed of stoichiometric hydrogen-oxygen flame diluted by argon at low pressure (47.5 torr) promotion at low concentration OPC (0.2-0.4 % mole fraction) and inhibition at 0.6-0.8 %. Such effect was not observed in other conditions at pressure 1 atm, and also in others flames (methane-oxygen) at anyone pressures. The analysis of sensitivity of flame speed to rate constants of the basic reactions in the mechanism of hydrogen oxidation (not containing phosphorus) at different concentration ТМP has shown that only rate constant of a chain branching reaction H+O 2=OH+O have an influence on flame speed. The analysis of sensitivity of a rate constants of reactions containing phosphorus species has shown the strongest dependence of a flame speed from reactions which are reactions of catalytic recombination of H, OH and O. These reactions increase flame speed ...
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Russian Journal of Physical Chemistry B, 2021
The article presents the results of the experimental and numerical studies of the reaction mechan... more The article presents the results of the experimental and numerical studies of the reaction mechanisms of chemically active combustion inhibitors and fire retardants in flames. The chemical processes occurring in flames with the introduction of additives of various types of inhibitors—phosphorus- and metal-containing compounds, the mechanism of their transformation, the mechanism of the effect of these compounds on the combustion rate, and the structure of hydrogen and hydrocarbon flames—are considered. The main results of the experimental and theoretical studies, as well as the modeling of the combustion chemistry of hydrogen and hydrocarbon mixed and diffusion flames with and without additives of chemically active inhibitors, are described. It is shown that not only inhibitors in hydrogen and hydrocarbon flames but also fire retardants in polymer flames act by a chain mechanism as a result of the catalysis of the recombination of atoms and radicals. The prospects for the practical ...
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Introduction The combustion processes of modern solid rocket propellants (SRP), occurring in comb... more Introduction The combustion processes of modern solid rocket propellants (SRP), occurring in combustion chamber of rocket motor, are characterized by pressures about 4 8 MPa and temperatures ~ 3000К. The peculiarity of studying of these processes is that at such temperatures the products of combustion are in partly dissociate state and present a complex multicomponent gas mixture, which can exist without essential changes only at the temperature of combustion. The burning rates of propellants in such conditions are high – 10 40 mm/s, so the used methods should be fast enough. At present authors doesn’t know methods, enabling to determine the composition of combustion products in considered conditions without distortion. The known САRS method [1] is complex, expensive and difficult and it does not allow measuring such important combustion products as СО2 and Н2О. The most universal methods of flame structures investigation are the probe ones. Previously authors used the method of mol...
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Mole fraction profiles of the species in a premixed ethyl pentanoate/oxygen/argon flame stabilize... more Mole fraction profiles of the species in a premixed ethyl pentanoate/oxygen/argon flame stabilized on a McKenna burner at 20 torr are acquired using flame sampling molecular-beam mass spectrometry with vacuum ultraviolet photoionization. The experimental results are compared with the results of numerical modeling using a chemical kinetic mechanism for ethyl pentanoate oxidation proposed in the literature.
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: A considerable number of works have been devoted to a study of the catalysis mechanism in the b... more : A considerable number of works have been devoted to a study of the catalysis mechanism in the burning of condensed mixtures on the base of ammonium perchlorate (AP). There is no single point of view on this question. The data of some authors confirm the gas-phase mechanism for the action of the catalyst while experiments indicate that the place of action of the catalyst is the condensed phase. The theory of the strongest possible catalyst in the gas phase predicts the strong dependence of the catalyst's effectiveness on its dispersion. This work is devoted to an experimental study of the mechanism of the catalyst's action on the burning of condensed systems on the base of AP.
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Fire Technology, 2021
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Combustion, Explosion, and Shock Waves, 2017
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Doklady Physics, 2016
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Energy & Fuels, 2017
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Eurasian Chemico-Technological Journal, 2014
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Proceedings of the Combustion Institute, 2009
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Kinetics and Catalysis, 2010
The effect of the catalytic recombination reactions of H and OH− involving phosphorus-containing ... more The effect of the catalytic recombination reactions of H and OH− involving phosphorus-containing products of trimethyl phosphate (TMP) combustion on the burning velocity and the structure of H2/O2/N2 flames at atmospheric pressure has been investigated. An earlier mechanism for inhibition of rich hydrogen/oxygen flames by organophosphorus compounds has been tested and modified by comparing experimental data with the results of simulation. The sensitivity analysis of the calculated flame speed to the rate constants of chain branching reactions and chain termination reactions involving phosphorus-containing compounds has revealed significant specific features of the inhibition mechanism of hydrogen flames with various stoichiometries and dilution ratios. Unlike the inhibition efficiency of hydrocarbon flames, in which the reactions of H and OH− radicals with PO, PO2, HOPO, and HOPO2 play the key role, the inhibition efficiency of hydrogen flames at atmospheric pressure is determined by the interaction of hydrogen and oxygen atoms with TMP and with organophosphorus products of its decomposition in the low-temperature zone of the flame. The sensitivity analysis has demonstrated that, as the equivalence ratio (ϕ) or the dilution ratio is increased, the ratio of the chain branching rate to the rate of chain termination via reactions involving phosphorus compounds decreases. As a consequence, the efficiency of inhibition of H2/O2/N2 flames, as distinct from that of hydrocarbon flames, increases as ϕ is raised from 1.1 to 3.0 and as the mixture is progressively diluted with nitrogen.
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Combustion Science and Technology, 1996
ABSTRACT A method of mass-spectrometric sampling (MSS) of solid propellant (SP) flames for SP fla... more ABSTRACT A method of mass-spectrometric sampling (MSS) of solid propellant (SP) flames for SP flame structure investigation is described. Two types of instruments have been developed: 1) microprobe sampling and 2) molecular-beam mass-spectrometry (MBMS)using time-of-flight mass spectrometry (TOFMS). Addressing an important question concerning estimated errors of probe measurements, detailed investigations on substantiating the sampling technique for flames with narrow combustion zones have been carried out. Examples of the mass-spectrometric probing technique applications to study the flame structure of the following solid propellants and their ingredients are presented: RDX, HMX, sandwich type systems based on HMX and double-base propellants. Applications of MSS to study of unstable combustion of SP are described.
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Combustion, Explosion, and Shock Waves, 1997
ABSTRACT A review of the results of experimental studies of the destruction chemistry of organoph... more ABSTRACT A review of the results of experimental studies of the destruction chemistry of organophosphorus compounds modeling sarin in hydrogen-oxygen rarefied flames is presented. These studies were performed at the Institute of Chemical Kinetics and Combustion of the Siberian Division of the Russian Academy of Sciences by soft ionization probe molecular beam mass spectrometry. A method is described that allows one to identify almost all starting, intermediate (including atoms and free radicals), and final organophosphorus compounds and to measure concentration profiles in flames. The destruction products of organophosphorus compounds—dimethyl methylphosphonate and trimethylphosphate—are identified in various zones of an H2/O2/Ar flame. Mass peak intensities proportional to the concentrations of the indicated products are measured. The inhibition and promotion phenomena of the flames are discovered and studied. A chemical mechanism for the destruction of organophosphorus compounds in the flames is proposed. The results obtained are important for understanding the processes involved in the incineration of chemical warfare agents and munitions and other toxic and hazardous substances, for optimization of this technology, and also for understanding the inhibition and promotion mechanisms of flames.
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Combustion, Explosion, and Shock Waves, 1974
ABSTRACT Without Abstract
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Combustion, Explosion, and Shock Waves, 1972
ABSTRACT
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Combustion, Explosion, and Shock Waves, 1982
ABSTRACT This article reports on detailed calculations on the reaction kinetics in APC flames on ... more ABSTRACT This article reports on detailed calculations on the reaction kinetics in APC flames on the basis of a wide set of possible reactions and experimental data on the initial composition of the gas mixture (gasification products from APC). The purpose is to select the most important reactions in this system by comparing the calculations on the kinetics with experimental data on the concentration profiles in APC flames. Discusses kinetic equations; rate constants as the reaction mechanism; results from kinetic calculations; and identification of major stages. A laminar flame such as that provided by ammonium perchlorate is described in general form by a system of differential equations that incorporate the transport of heat and matter in the presence of chemical reactions. APC is a system consisting of 4 elements (N,H,Cl and O). Points out that the scheme enables one to determine which reactions are responsible for producing the final products. Suggests that in the future one will be able to analyze experimental data on the reaction-rate profiles for stable components in order to determine either the atom and radical concentrations or the rate constants of the reactions involving them.
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Russian Journal of Physical Chemistry B, 2008
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The work is devoted to the detailed kinetic analysis of the unusual influence of the additives of... more The work is devoted to the detailed kinetic analysis of the unusual influence of the additives of organophosphorus compounds (OPC) on speed of stoichiometric hydrogen-oxygen flame diluted by argon at low pressure (47.5 torr) promotion at low concentration OPC (0.2-0.4 % mole fraction) and inhibition at 0.6-0.8 %. Such effect was not observed in other conditions at pressure 1 atm, and also in others flames (methane-oxygen) at anyone pressures. The analysis of sensitivity of flame speed to rate constants of the basic reactions in the mechanism of hydrogen oxidation (not containing phosphorus) at different concentration ТМP has shown that only rate constant of a chain branching reaction H+O 2=OH+O have an influence on flame speed. The analysis of sensitivity of a rate constants of reactions containing phosphorus species has shown the strongest dependence of a flame speed from reactions which are reactions of catalytic recombination of H, OH and O. These reactions increase flame speed ...
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Russian Journal of Physical Chemistry B, 2021
The article presents the results of the experimental and numerical studies of the reaction mechan... more The article presents the results of the experimental and numerical studies of the reaction mechanisms of chemically active combustion inhibitors and fire retardants in flames. The chemical processes occurring in flames with the introduction of additives of various types of inhibitors—phosphorus- and metal-containing compounds, the mechanism of their transformation, the mechanism of the effect of these compounds on the combustion rate, and the structure of hydrogen and hydrocarbon flames—are considered. The main results of the experimental and theoretical studies, as well as the modeling of the combustion chemistry of hydrogen and hydrocarbon mixed and diffusion flames with and without additives of chemically active inhibitors, are described. It is shown that not only inhibitors in hydrogen and hydrocarbon flames but also fire retardants in polymer flames act by a chain mechanism as a result of the catalysis of the recombination of atoms and radicals. The prospects for the practical ...
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Introduction The combustion processes of modern solid rocket propellants (SRP), occurring in comb... more Introduction The combustion processes of modern solid rocket propellants (SRP), occurring in combustion chamber of rocket motor, are characterized by pressures about 4 8 MPa and temperatures ~ 3000К. The peculiarity of studying of these processes is that at such temperatures the products of combustion are in partly dissociate state and present a complex multicomponent gas mixture, which can exist without essential changes only at the temperature of combustion. The burning rates of propellants in such conditions are high – 10 40 mm/s, so the used methods should be fast enough. At present authors doesn’t know methods, enabling to determine the composition of combustion products in considered conditions without distortion. The known САRS method [1] is complex, expensive and difficult and it does not allow measuring such important combustion products as СО2 and Н2О. The most universal methods of flame structures investigation are the probe ones. Previously authors used the method of mol...
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Mole fraction profiles of the species in a premixed ethyl pentanoate/oxygen/argon flame stabilize... more Mole fraction profiles of the species in a premixed ethyl pentanoate/oxygen/argon flame stabilized on a McKenna burner at 20 torr are acquired using flame sampling molecular-beam mass spectrometry with vacuum ultraviolet photoionization. The experimental results are compared with the results of numerical modeling using a chemical kinetic mechanism for ethyl pentanoate oxidation proposed in the literature.
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: A considerable number of works have been devoted to a study of the catalysis mechanism in the b... more : A considerable number of works have been devoted to a study of the catalysis mechanism in the burning of condensed mixtures on the base of ammonium perchlorate (AP). There is no single point of view on this question. The data of some authors confirm the gas-phase mechanism for the action of the catalyst while experiments indicate that the place of action of the catalyst is the condensed phase. The theory of the strongest possible catalyst in the gas phase predicts the strong dependence of the catalyst's effectiveness on its dispersion. This work is devoted to an experimental study of the mechanism of the catalyst's action on the burning of condensed systems on the base of AP.
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Fire Technology, 2021
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Combustion, Explosion, and Shock Waves, 2017
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Doklady Physics, 2016
Bookmarks Related papers MentionsView impact
Energy & Fuels, 2017
Bookmarks Related papers MentionsView impact
Eurasian Chemico-Technological Journal, 2014
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Proceedings of the Combustion Institute, 2009
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Kinetics and Catalysis, 2010
The effect of the catalytic recombination reactions of H and OH− involving phosphorus-containing ... more The effect of the catalytic recombination reactions of H and OH− involving phosphorus-containing products of trimethyl phosphate (TMP) combustion on the burning velocity and the structure of H2/O2/N2 flames at atmospheric pressure has been investigated. An earlier mechanism for inhibition of rich hydrogen/oxygen flames by organophosphorus compounds has been tested and modified by comparing experimental data with the results of simulation. The sensitivity analysis of the calculated flame speed to the rate constants of chain branching reactions and chain termination reactions involving phosphorus-containing compounds has revealed significant specific features of the inhibition mechanism of hydrogen flames with various stoichiometries and dilution ratios. Unlike the inhibition efficiency of hydrocarbon flames, in which the reactions of H and OH− radicals with PO, PO2, HOPO, and HOPO2 play the key role, the inhibition efficiency of hydrogen flames at atmospheric pressure is determined by the interaction of hydrogen and oxygen atoms with TMP and with organophosphorus products of its decomposition in the low-temperature zone of the flame. The sensitivity analysis has demonstrated that, as the equivalence ratio (ϕ) or the dilution ratio is increased, the ratio of the chain branching rate to the rate of chain termination via reactions involving phosphorus compounds decreases. As a consequence, the efficiency of inhibition of H2/O2/N2 flames, as distinct from that of hydrocarbon flames, increases as ϕ is raised from 1.1 to 3.0 and as the mixture is progressively diluted with nitrogen.
Bookmarks Related papers MentionsView impact
Combustion Science and Technology, 1996
ABSTRACT A method of mass-spectrometric sampling (MSS) of solid propellant (SP) flames for SP fla... more ABSTRACT A method of mass-spectrometric sampling (MSS) of solid propellant (SP) flames for SP flame structure investigation is described. Two types of instruments have been developed: 1) microprobe sampling and 2) molecular-beam mass-spectrometry (MBMS)using time-of-flight mass spectrometry (TOFMS). Addressing an important question concerning estimated errors of probe measurements, detailed investigations on substantiating the sampling technique for flames with narrow combustion zones have been carried out. Examples of the mass-spectrometric probing technique applications to study the flame structure of the following solid propellants and their ingredients are presented: RDX, HMX, sandwich type systems based on HMX and double-base propellants. Applications of MSS to study of unstable combustion of SP are described.
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Combustion, Explosion, and Shock Waves, 1997
ABSTRACT A review of the results of experimental studies of the destruction chemistry of organoph... more ABSTRACT A review of the results of experimental studies of the destruction chemistry of organophosphorus compounds modeling sarin in hydrogen-oxygen rarefied flames is presented. These studies were performed at the Institute of Chemical Kinetics and Combustion of the Siberian Division of the Russian Academy of Sciences by soft ionization probe molecular beam mass spectrometry. A method is described that allows one to identify almost all starting, intermediate (including atoms and free radicals), and final organophosphorus compounds and to measure concentration profiles in flames. The destruction products of organophosphorus compounds—dimethyl methylphosphonate and trimethylphosphate—are identified in various zones of an H2/O2/Ar flame. Mass peak intensities proportional to the concentrations of the indicated products are measured. The inhibition and promotion phenomena of the flames are discovered and studied. A chemical mechanism for the destruction of organophosphorus compounds in the flames is proposed. The results obtained are important for understanding the processes involved in the incineration of chemical warfare agents and munitions and other toxic and hazardous substances, for optimization of this technology, and also for understanding the inhibition and promotion mechanisms of flames.
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Combustion, Explosion, and Shock Waves, 1974
ABSTRACT Without Abstract
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Combustion, Explosion, and Shock Waves, 1972
ABSTRACT
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Combustion, Explosion, and Shock Waves, 1982
ABSTRACT This article reports on detailed calculations on the reaction kinetics in APC flames on ... more ABSTRACT This article reports on detailed calculations on the reaction kinetics in APC flames on the basis of a wide set of possible reactions and experimental data on the initial composition of the gas mixture (gasification products from APC). The purpose is to select the most important reactions in this system by comparing the calculations on the kinetics with experimental data on the concentration profiles in APC flames. Discusses kinetic equations; rate constants as the reaction mechanism; results from kinetic calculations; and identification of major stages. A laminar flame such as that provided by ammonium perchlorate is described in general form by a system of differential equations that incorporate the transport of heat and matter in the presence of chemical reactions. APC is a system consisting of 4 elements (N,H,Cl and O). Points out that the scheme enables one to determine which reactions are responsible for producing the final products. Suggests that in the future one will be able to analyze experimental data on the reaction-rate profiles for stable components in order to determine either the atom and radical concentrations or the rate constants of the reactions involving them.
Bookmarks Related papers MentionsView impact