Research output: Contribution to journal › Article › peer-review
Formation of methane hydrate from water sorbed by anthracite : An investgation by low-field NMR relaxation. / Turakhanov, A. H.; Shumskayte, M. Y.; Ildyakov, A. V. et al.
In: Fuel, Vol. 262, 116656, 15.02.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Formation of methane hydrate from water sorbed by anthracite
T2 - An investgation by low-field NMR relaxation
AU - Turakhanov, A. H.
AU - Shumskayte, M. Y.
AU - Ildyakov, A. V.
AU - Manakov, A. Y.
AU - Smirnov, V. G.
AU - Glinskikh, V. N.
AU - Duchkov, A. D.
N1 - Publisher Copyright: © 2019 Elsevier Ltd
PY - 2020/2/15
Y1 - 2020/2/15
N2 - Transverse relaxation time spectra T2 were studied for the samples (a) of wet coal in which methane hydrate was obtained, (b) wet coal exposed under the pressure of methane without the formation of the hydrate, and (c) initial wet coal. In all these cases, the samples of wet coal contained only water adsorbed in the fine pores of the coal substance. It was demonstrated that hydrate formation and the competitive sorption of methane at the positions previously occupied by water causes replacement of a part of water from coal mesopores into larger pores. The data obtained confirm a previously proposed multistage model (Smirnov et al., 2018) of hydrate formation in natural coal, which includes the stages of replacement of a part of sorbed water from coal pores by gas, the formation of microscopic water fragments in larger coal pores, and the formation of hydrate from this water.
AB - Transverse relaxation time spectra T2 were studied for the samples (a) of wet coal in which methane hydrate was obtained, (b) wet coal exposed under the pressure of methane without the formation of the hydrate, and (c) initial wet coal. In all these cases, the samples of wet coal contained only water adsorbed in the fine pores of the coal substance. It was demonstrated that hydrate formation and the competitive sorption of methane at the positions previously occupied by water causes replacement of a part of water from coal mesopores into larger pores. The data obtained confirm a previously proposed multistage model (Smirnov et al., 2018) of hydrate formation in natural coal, which includes the stages of replacement of a part of sorbed water from coal pores by gas, the formation of microscopic water fragments in larger coal pores, and the formation of hydrate from this water.
KW - Coal
KW - Gas hydrate
KW - Methane
KW - NMR
KW - Spin-spin relaxation
KW - Water adsorption
KW - COAL
KW - DECOMPOSITION
KW - PARAMETERS
UR - http://www.scopus.com/inward/record.url?scp=85075719584&partnerID=8YFLogxK
U2 - 10.1016/j.fuel.2019.116656
DO - 10.1016/j.fuel.2019.116656
M3 - Article
AN - SCOPUS:85075719584
VL - 262
JO - Fuel
JF - Fuel
SN - 0016-2361
M1 - 116656
ER -
ID: 22500209