Methods of Reducing the Front Performance Flame at the Underground Mines Works

Tulepov, M. I.; Mansurov, Z. A.; Kazakov, Yu. V.; Abdrakova, F. Yu.; Sultanova, Z. L.; Rakhova, N. M.

doi:10.13005/ojc/340645

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…It allows to increase the area of a working surface, to obtain smaller counter-pressure, to accelerate a heating of catalytic converter up to the working temperature. For example, in 13,14,29,33,54,56,60,61 for preparation of catalysts on the metal block carriers the heat-resistant foil has been applied.…”

Section: Fig 4 Equipment For Preparation Of Metal Block Catalysts (A-centrifuge B-furnaces For Roasting Of Catalysts) and Flow Installatimentioning

confidence: 99%

The Main Components of Vehicle Exhaust Gases and Their Effective Catalytic Neutralization

et al. 2019

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The constantly increasing growth in the number of cars is one of the reasons for the deterioration of the ecological situation in cities and large settlements. In Kazakhstan, on a national scale, the share of motor vehicles in total emissions of pollutants into the atmosphere by all technogenic sources reaches on average 40%, in the mass of industrial waste - 2%. The content of toxic substances in the exhaust of diesel and gasoline engines varies and depends on the type of engine and mode of operation, as well as on the quality of the fuel, the composition of the combustible mixture in the engine cylinders, speed and driving conditions, ignition system and fuel control. The number of all toxic components in the exhaust gas exceeds the maximum permissible standards by tens and hundreds of times. One of the most reliable ways to reduce the toxicity of vehicle exhaust gases and remove harmful substances is the complete oxidation of exhaust components using catalytic compositions on metal or ceramic block carriers. The article accumulates data from the scientific literature about toxicity of different components of exhaust gases and catalytic neutralization of vehicle exhaust gases by various scientific schools.

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Section: Fig 4 Equipment For Preparation Of Metal Block Catalysts (A-centrifuge B-furnaces For Roasting Of Catalysts) and Flow Installatimentioning

confidence: 99%

The Main Components of Vehicle Exhaust Gases and Their Effective Catalytic Neutralization

et al. 2019

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“…Briquettes obtained at optimum technological parameters and compositions, according to the content of volatile substances, belong to the category of smoky household solid fuels. [31][32][33][34] The burning of the resulting fuel at 1123 K shows that the combustion of briquettes takes place within 383-386 K, and negligible allocation of soot in fire and combustion are observed for the briquette samples, containing both unmodified and modified tar.…”

Section: Fig 5 General View Of Coal Briquettementioning

confidence: 99%

Physical and Mathematical Models of Target Component Extraction from Rectlinear Capillaries

Гумницький¹,

Venger²,

Sabadash³

et al. 2022

ChChT

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The extraction of the solid component from the rectilinear capillary has been investigated. The presence of two extraction zones (convective and molecular diffusion) was confirmed. The effect of the system vacuumizing on the extraction rate has been studied. The convection zone during vacuumizing was found to be increased due to the appearance of the vapor phase bubbles. The mass transfer coefficients for the convective zone have been determined. A mathematical model of the molecular diffusion stage is given, taking into account the nonlinear change in the component concentration in the liquid due to the displacement of the extraction boundary. The molecular diffusion coefficients in the capillary have been determined.

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“…As for the stoichiometric mechanism of such reactions, most often it cannot be represented as a simple set of stages of chemical transformations of individual functional groups: there is the possibility of steric hindrance, which reduces the rate of their interaction with hydrogen, the probability of side condensation of intermediate products, intramolecular regrouping and cyclization, which leads to the formation of various compounds [51][52][53][54][55][56][57][58][59][60] .…”

Section: Fig 8 the Mechanism Of Hydrogenation Of Ethyl 4-nitrobenzoic Acid 32mentioning

confidence: 99%

Studying the Mechanisms of Nitro Compounds Reduction (A-Review)

et al. 2019

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The article describes some variants of mechanisms of nitro compounds reduction, offered by authors in the scientific literature. The focus is on the description of the work of Kazakh and Russian chemists working in the field of catalysis. In most of the works, the classical scheme of the mechanism of the hydrogenation of Haber-Lukashevich nitrobenzene is confirmed and detailed by experimental methods. One of the interesting aspect of the article is description the mechanism of Ya.A. Dorfman which used the orbital theory of catalysis. The orbital approach of the Ya.A. Dorfman mechanism is constructed in the light of modern orbital representations and is valid for the hydrogenation of the nitro group on various catalysts. Among the discussed mechanisms are ideas of Haber, Debus, Jungers, V.P. Shmonina, Lukashevich, M. Geirovsky, Yu. B. Vasilyev, M.V. Klyuev, E.F. Weinstein, E. Gelder, Ya.A. Dorfman and others.

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Methods of Reducing the Front Performance Flame at the Underground Mines Works

Cited by 5 publications

References 14 publications

The Main Components of Vehicle Exhaust Gases and Their Effective Catalytic Neutralization

The Main Components of Vehicle Exhaust Gases and Their Effective Catalytic Neutralization

Physical and Mathematical Models of Target Component Extraction from Rectlinear Capillaries

Studying the Mechanisms of Nitro Compounds Reduction (A-Review)

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