Teplofizika vysokikh temperatur
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Teplofizika vysokikh temperatur, 2022, Volume 60, Issue 6, Pages 888–896
DOI: https://doi.org/10.31857/S0040364422040159
(Mi tvt11599)
 

Heat and Mass Transfer and Physical Gasdynamics

Effect of $\rm CH_4{,}~\rm H_2{,}~\rm Ar$, carbon additives and the shape of a reactor on the porous structure of acetylene black formed during the decomposition of acetylene

M. S. Vlaskina, P. V. Belovba, I. A. Lipatovaa, A. V. Grigorenkoa, E. I. Shkol'nikova, A. I. Kurbatovab, V. E. Fortova

a Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow
b Peoples' Friendship University of Russia, Moscow
References:
Abstract: The porous structure of acetylene black was studied depending on the conditions of its preparation in the decomposition of acetylene: at various pressures in a tubular reactor of limited volume, decomposition of acetylene in mixtures with $\rm CH_4{,}~\rm H_2$, or $\rm Ar$ and decomposition of acetylene in the presence of acetylene black and in reactors of various shapes. It has been found that the decomposition of pure acetylene with an increase in pressure from $2.35$ to $5$ bar increases the surface area of acetylene black from $75$ to $125$ m$^2$/g, and the average particle size decreases from $36$ to $22$ nm. Additives of $\rm CH_4{,}~\rm H_2$, or $\rm Ar$ inhibit the decomposition of acetylene, while the degree of inhibition decreases in the following sequence: $\rm H_2 > \rm CH_4 > \rm Ar$. Relatively small additions of hydrogen block the decomposition of acetylene, practically without affecting the size of acetylene black particles. On the contrary, addition of methane leads to a significant increase in the average size of acetylene black particles to $55$ nm and a corresponding decrease in the specific surface area to $57$ m$^2$/g. Addition of argon to acetylene qualitatively affects the porous structure of acetylene black in the same way as reducing the pressure of acetylene. During the decomposition of acetylene in the presence of acetylene black remaining in the reactor after the previous decomposition, a nonmonotonic change in the specific surface area and size of acetylene black particles was observed. It was shown in experiments with reactors different in shape but identical in volume that, with a decrease in the linear dimensions of the reaction vessel (length/diameter ratio), the surface area of the formed acetylene black increases rather significantly, and the average size of acetylene black particles decreases.
Funding agency Grant number
Russian Science Foundation 21-19-00390
The study was supported by the Russian Science Foundation (agreement no. 21-19-00390, https://rscf.ru/project/21-19-00390/).
Received: 09.06.2021
Revised: 09.06.2021
Accepted: 23.11.2021
English version:
High Temperature, 2022, Volume 60, Issue 6, Pages 821–829
DOI: https://doi.org/10.1134/S0018151X22040150
Bibliographic databases:
Document Type: Article
UDC: 66.092-977
Language: Russian
Citation: M. S. Vlaskin, P. V. Belov, I. A. Lipatova, A. V. Grigorenko, E. I. Shkol'nikov, A. I. Kurbatova, V. E. Fortov, “Effect of $\rm CH_4{,}~\rm H_2{,}~\rm Ar$, carbon additives and the shape of a reactor on the porous structure of acetylene black formed during the decomposition of acetylene”, TVT, 60:6 (2022), 888–896; High Temperature, 60:6 (2022), 821–829
Citation in format AMSBIB
\Bibitem{VlaBelLip22}
\by M.~S.~Vlaskin, P.~V.~Belov, I.~A.~Lipatova, A.~V.~Grigorenko, E.~I.~Shkol'nikov, A.~I.~Kurbatova, V.~E.~Fortov
\paper Effect of $\rm CH_4{,}~\rm H_2{,}~\rm Ar$, carbon additives and the shape of a~reactor on the porous structure of acetylene black formed during the decomposition of acetylene
\jour TVT
\yr 2022
\vol 60
\issue 6
\pages 888--896
\mathnet{http://mi.mathnet.ru/tvt11599}
\crossref{https://doi.org/10.31857/S0040364422040159}
\elib{https://elibrary.ru/item.asp?id=49994245}
\transl
\jour High Temperature
\yr 2022
\vol 60
\issue 6
\pages 821--829
\crossref{https://doi.org/10.1134/S0018151X22040150}
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