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120 results on '"Sedov, I. V."'

38. Combined Production of Hydrogen and Methanol without CO2 Emission Based on Matrix Conversion of Natural Gas.

Author

Arutyunov, V. S., Nikitin, A. V., Savchenko, V. I., and Sedov, I. V.

Subjects
NATURAL gas, HYDROGEN production, METHANOL production, METHANOL as fuel, CARBON emissions, CARBON dioxide
Abstract

Reducing carbon dioxide emissions during production is one of the main trends in modern oil and gas chemistry. One of the most realistic possibilities for achieving this is to involve carbon dioxide generated in technological processes as a feedstock for producing gas chemical products. The maximum effect can be achieved in the production of large-scale chemicals, such as syngas, hydrogen, and methanol. We consider such possibilities and present a new combined autothermal process for the joint production of hydrogen and methanol based on non-catalytic matrix conversion of natural gas into syngas, which allows one to almost avoid CO2 emissions. [ABSTRACT FROM AUTHOR]

Published
2023
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39. Non-Catalytic Partial Oxidation of C2+ Hydrocarbon/H2 Mixtures.

Author

Savchenko, V. I., Ozerskii, A. V., Nikitin, A. V., Sedov, I. V., and Arutyunov, V. S.

Subjects
PARTIAL oxidation, MIXTURES, STEAM reforming, MATHEMATICAL optimization, TEMPERATURE distribution, SYNTHESIS gas
Abstract

The paper reports the results of a kinetic and thermodynamic analysis of non-catalytic partial oxidation of methane and C2–C4 hydrocarbon/hydrogen mixtures (C/H = 1 : 4) at 1400–1700 K. The hydrocarbon conversion sequence and the time periods of the major process stages were identified for isothermal conditions. The initial stage of the oxidative conversion of C2+ hydrocarbons consists of their pyrolysis, primarily into ethylene and propylene, followed by oxidation of the pyrolysis products. In this respect, the kinetics of C2+ hydrocarbon oxidative conversion are different from those of methane conversion, marked by the almost simultaneous and significantly slower occurrence of pyrolysis and oxidation. The subsequent stages involve steam and dry reforming of the oxidation products, namely acetylene and methane; these stages continue until the main products (H2, CO, CO2, and H2O) reach an equilibrium distribution for the given temperature. The study findings are important for the optimization of various techniques for high-temperature syngas production via partial oxidation of C2+ hydrocarbons, as well as Moderate or Intense Low-Oxygen Dilution (MILD) combustion processes. [ABSTRACT FROM AUTHOR]

Published
2023
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40. Kinetics of Selective Trimerization of Ethylene to 1-Hexene over Chromium-Based Catalysts.

Author

Faingol'd, E. E., Lashmanov, N. N., Saratovskikh, S. L., Kulchakovsky, P. I., Lenev, D. A., Shamukaev, V. A., and Sedov, I. V.

Subjects
TRIMERIZATION, ETHYLENE, CHROMIUM catalysts, CATALYSTS, CATALYSIS
Abstract

This review provides an analysis of prior research on the kinetics of the trimerization of ethylene to 1-hexene over existing chromium-based catalytic systems. It discusses the known mechanisms and reaction steps for the formation of 1-hexene as well as olefin by-products. The effects of catalytic system composition, temperature, pressure, reaction time, and the presence of hydrogen on the kinetics of 1-hexene formation are also touched upon. The kinetic models of ethylene trimerization to 1-hexene known from published literature are presented. [ABSTRACT FROM AUTHOR]

Published
2023
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