Formation and decomposition of methane hydrate in coal

Vyacheslav G. Smirnov, Andrey Yu Manakov, Elissa A. Ukraintseva, Galina V. Villevald, Tamara D. Karpova, Valeriy V. Dyrdin, Sergey Yu Lyrshchikov, Zinfer R. Ismagilov, Irina S. Terekhova, Andrey G. Ogienko

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The formation of methane hydrate from water adsorbed on the surface of natural bituminous coal has been studied. The state of the adsorbed water has been examined with DSC and NMR techniques. The isotherm of adsorption of water on coal has been studied. The experiments have shown that the water adsorbed on the coal studied is bound and non-freezing, i.e., no ice formation and melting occurs on cooling and heating of the coal samples containing the adsorbed water. This water undergoes a glass-like transition. The adsorbed water can be divided into strongly bound and weakly bound, in accordance to known models of water sorption by coals. Cooling and heating of containing adsorbed water coal samples under methane pressure results in expressed pressure anomalies corresponding to the formation and decomposition of the methane hydrate. Thus, the non-freezing water is capable of forming gas hydrate. It has been demonstrated that the hydrate is formed only from the weakly bound water. The equilibrium pressure and temperature parameters of this hydrate are identical to those of the bulk hydrate. Thus, it has been shown that at proper pressure and temperature gas hydrates can be formed in coals even in absence of free water. The results obtained make possible to suggest that the hydrophilic areas of the coal surface are active sites of gas hydrate nucleation.

Original languageEnglish
Pages (from-to)188-195
Number of pages8
JournalFuel
Volume166
DOIs
Publication statusPublished - 15 Feb 2016

Fingerprint

Coal
Methane
Hydrates
Decomposition
Water
Gas hydrates
Cooling
Heating
Bituminous coal
Ice
Isotherms
Sorption
Melting
Nucleation
Nuclear magnetic resonance

Keywords

  • Coal
  • Gas hydrate
  • Methane
  • Water adsorption

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology
  • Chemical Engineering(all)
  • Organic Chemistry

Cite this

Smirnov, V. G., Manakov, A. Y., Ukraintseva, E. A., Villevald, G. V., Karpova, T. D., Dyrdin, V. V., ... Ogienko, A. G. (2016). Formation and decomposition of methane hydrate in coal. Fuel, 166, 188-195. https://doi.org/10.1016/j.fuel.2015.10.123

Formation and decomposition of methane hydrate in coal. / Smirnov, Vyacheslav G.; Manakov, Andrey Yu; Ukraintseva, Elissa A.; Villevald, Galina V.; Karpova, Tamara D.; Dyrdin, Valeriy V.; Lyrshchikov, Sergey Yu; Ismagilov, Zinfer R.; Terekhova, Irina S.; Ogienko, Andrey G.

In: Fuel, Vol. 166, 15.02.2016, p. 188-195.

Research output: Contribution to journalArticle

Smirnov, VG, Manakov, AY, Ukraintseva, EA, Villevald, GV, Karpova, TD, Dyrdin, VV, Lyrshchikov, SY, Ismagilov, ZR, Terekhova, IS & Ogienko, AG 2016, 'Formation and decomposition of methane hydrate in coal', Fuel, vol. 166, pp. 188-195. https://doi.org/10.1016/j.fuel.2015.10.123
Smirnov VG, Manakov AY, Ukraintseva EA, Villevald GV, Karpova TD, Dyrdin VV et al. Formation and decomposition of methane hydrate in coal. Fuel. 2016 Feb 15;166:188-195. https://doi.org/10.1016/j.fuel.2015.10.123
Smirnov, Vyacheslav G. ; Manakov, Andrey Yu ; Ukraintseva, Elissa A. ; Villevald, Galina V. ; Karpova, Tamara D. ; Dyrdin, Valeriy V. ; Lyrshchikov, Sergey Yu ; Ismagilov, Zinfer R. ; Terekhova, Irina S. ; Ogienko, Andrey G. / Formation and decomposition of methane hydrate in coal. In: Fuel. 2016 ; Vol. 166. pp. 188-195.
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abstract = "The formation of methane hydrate from water adsorbed on the surface of natural bituminous coal has been studied. The state of the adsorbed water has been examined with DSC and NMR techniques. The isotherm of adsorption of water on coal has been studied. The experiments have shown that the water adsorbed on the coal studied is bound and non-freezing, i.e., no ice formation and melting occurs on cooling and heating of the coal samples containing the adsorbed water. This water undergoes a glass-like transition. The adsorbed water can be divided into strongly bound and weakly bound, in accordance to known models of water sorption by coals. Cooling and heating of containing adsorbed water coal samples under methane pressure results in expressed pressure anomalies corresponding to the formation and decomposition of the methane hydrate. Thus, the non-freezing water is capable of forming gas hydrate. It has been demonstrated that the hydrate is formed only from the weakly bound water. The equilibrium pressure and temperature parameters of this hydrate are identical to those of the bulk hydrate. Thus, it has been shown that at proper pressure and temperature gas hydrates can be formed in coals even in absence of free water. The results obtained make possible to suggest that the hydrophilic areas of the coal surface are active sites of gas hydrate nucleation.",
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AB - The formation of methane hydrate from water adsorbed on the surface of natural bituminous coal has been studied. The state of the adsorbed water has been examined with DSC and NMR techniques. The isotherm of adsorption of water on coal has been studied. The experiments have shown that the water adsorbed on the coal studied is bound and non-freezing, i.e., no ice formation and melting occurs on cooling and heating of the coal samples containing the adsorbed water. This water undergoes a glass-like transition. The adsorbed water can be divided into strongly bound and weakly bound, in accordance to known models of water sorption by coals. Cooling and heating of containing adsorbed water coal samples under methane pressure results in expressed pressure anomalies corresponding to the formation and decomposition of the methane hydrate. Thus, the non-freezing water is capable of forming gas hydrate. It has been demonstrated that the hydrate is formed only from the weakly bound water. The equilibrium pressure and temperature parameters of this hydrate are identical to those of the bulk hydrate. Thus, it has been shown that at proper pressure and temperature gas hydrates can be formed in coals even in absence of free water. The results obtained make possible to suggest that the hydrophilic areas of the coal surface are active sites of gas hydrate nucleation.

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