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Fizika Goreniya i Vzryva, 2018, Volume 54, Issue 2, Pages 15–26
DOI: https://doi.org/10.15372/FGV20180202
(Mi fgv486)
 

This article is cited in 9 scientific papers (total in 9 papers)

Numerical analysis of hydrogen sulphide conversion to hydrogen during its pyrolysis and partial oxidation

V. A. Savel'eva, A. M. Starik, N. S. Titova, O. N. Favorskii

Baranov Central Institute of Aviation Motors, Moscow, 111116, Russia
Full-text PDF (409 kB) Citations (9)
Abstract: Obtaining of hydrogen during pyrolysis and partial oxidation of hydrogen sulphide is analyzed on the basis of a detailed kinetic model of $\mathrm{H}_2\mathrm{S}$ oxidation. It is shown that the $\mathrm{H}_2$ output in the case of $\mathrm{H}_2\mathrm{S}$ pyrolysis in adiabatic flow reactor with a residence time of $\approx1$ s. Even for the initial temperature of the mixture $T_0=1400$ K, the molar fraction of $\mathrm{H}_2$ is only $12\%$, though the equilibrium value is reached within the reactor. At $T_0<1200$ K, there is no enough time for the chemical equilibrium inside the reactor to be established, and the $\mathrm{H}_2$ concentration is lower than the equilibrium value. At $T_0<1000$ K, there is practically no pyrolysis reaction in the reactor. Addition of a small amount of air to $\mathrm{H}_2\mathrm{S}$ leads to energy release, to an increase in temperature, and, as a consequence, to acceleration of $\mathrm{H}_2\mathrm{S}$ conversion. The normalized output of $\mathrm{H}_2$ can be increased by several times. For each value of $T_0$, there exists an optimal value of the fuel-to-air equivalence ratio $\phi$ that ensures the maximum $\mathrm{H}_2$ output in the $\mathrm{H}_2\mathrm{S}$-air mixture. The process of partial oxidation at high values of $\phi>\phi_b$ and low values of $T_0$ is essentially nonequilibrium; as a result, the $\mathrm{H}_2$ concentration at the exit from a finite-length reactor can be higher than its equilibrium value, e.g., by $30$$40\%$ at $T_0=800$ K and $\phi=6-10$. The reasons responsible for reaching a “superequilibrium” concentration of $\mathrm{H}_2$ at the flow reactor exit are determined.
Keywords: hydrogen obtaining, hydrogen sulphide, pyrolysis, partial oxidation, kinetic mechanism, simulation.
Funding agency Grant number
Russian Science Foundation 16-19-00111
Ministry of Education and Science of the Russian Federation НШ-7018.2016.8
Received: 18.04.2017
English version:
Combustion, Explosion and Shock Waves, 2018, Volume 54, Issue 2, Pages 136–146
DOI: https://doi.org/10.1134/S0010508218020028
Bibliographic databases:
Document Type: Article
UDC: 661.224,544.4
Language: Russian
Citation: V. A. Savel'eva, A. M. Starik, N. S. Titova, O. N. Favorskii, “Numerical analysis of hydrogen sulphide conversion to hydrogen during its pyrolysis and partial oxidation”, Fizika Goreniya i Vzryva, 54:2 (2018), 15–26; Combustion, Explosion and Shock Waves, 54:2 (2018), 136–146
Citation in format AMSBIB
\Bibitem{SavStaTit18}
\by V.~A.~Savel'eva, A.~M.~Starik, N.~S.~Titova, O.~N.~Favorskii
\paper Numerical analysis of hydrogen sulphide conversion to hydrogen during its pyrolysis and partial oxidation
\jour Fizika Goreniya i Vzryva
\yr 2018
\vol 54
\issue 2
\pages 15--26
\mathnet{http://mi.mathnet.ru/fgv486}
\crossref{https://doi.org/10.15372/FGV20180202}
\elib{https://elibrary.ru/item.asp?id=32819287}
\transl
\jour Combustion, Explosion and Shock Waves
\yr 2018
\vol 54
\issue 2
\pages 136--146
\crossref{https://doi.org/10.1134/S0010508218020028}
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  • This publication is cited in the following 9 articles:
    Citing articles in Google Scholar: Russian citations, English citations
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    Fizika Goreniya i Vzryva Fizika Goreniya i Vzryva
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