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Geosciences (Switzerland), volume 12, issue 7, pages 276

Migration of Salt Ions in Frozen Hydrate-Saturated Sediments: Temperature and Chemistry Constraints

Publication typeJournal Article
Publication date2022-07-09
Quartile SCImago
Q2
Quartile WOS
Impact factor2.5
ISSN20763263
General Earth and Planetary Sciences
Abstract

Migration of dissolved salts from natural (cryopeg brines, seawater, etc.), or artificial sources can destabilize intrapermafrost gas hydrates. Salt transport patterns vary as a function of gas pressure, temperature, salinity, etc. The sensitivity of the salt migration and hydrate dissociation processes to ambient temperature and to the concentration and chemistry of saline solutions is investigated experimentally on frozen sand samples at a constant negative temperature (−6 °C). The experiments show that the ambient temperature and the solution chemistry control the critical salt concentration required for complete gas hydrate dissociation. Salt ions migrate faster from more saline solutions at higher temperatures, and the pore moisture can reach the critical salinity in a shorter time. The flux density and contents of different salt ions transported to the samples increase in the series Na2SO4–KCl–CaCl2–NaCl–MgCl2. A model is suggested to account for phase transitions of pore moisture in frozen hydrate-saturated sediments exposed to contact with concentrated saline solutions at pressures above and below the thermodynamic equilibrium, in stable and metastable conditions of gas hydrates, respectively.

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1
Energy & Fuels
Energy & Fuels, 1, 50%
Energy & Fuels
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Geosciences (Switzerland)
Geosciences (Switzerland), 1, 50%
Geosciences (Switzerland)
1 publication, 50%
1

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American Chemical Society (ACS)
American Chemical Society (ACS), 1, 50%
American Chemical Society (ACS)
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Multidisciplinary Digital Publishing Institute (MDPI)
Multidisciplinary Digital Publishing Institute (MDPI), 1, 50%
Multidisciplinary Digital Publishing Institute (MDPI)
1 publication, 50%
1
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Chuvilin E. et al. Migration of Salt Ions in Frozen Hydrate-Saturated Sediments: Temperature and Chemistry Constraints // Geosciences (Switzerland). 2022. Vol. 12. No. 7. p. 276.
GOST all authors (up to 50) Copy
Chuvilin E., Ekimova V., Davletshina D., Bukhanov B., Krivokhat E., Shilenkov V. Migration of Salt Ions in Frozen Hydrate-Saturated Sediments: Temperature and Chemistry Constraints // Geosciences (Switzerland). 2022. Vol. 12. No. 7. p. 276.
RIS |
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RIS Copy
TY - JOUR
DO - 10.3390/geosciences12070276
UR - https://doi.org/10.3390%2Fgeosciences12070276
TI - Migration of Salt Ions in Frozen Hydrate-Saturated Sediments: Temperature and Chemistry Constraints
T2 - Geosciences (Switzerland)
AU - Ekimova, Valentina
AU - Davletshina, Dinara
AU - Krivokhat, Ekaterina
AU - Shilenkov, Vladimir
AU - Chuvilin, E.M.
AU - Bukhanov, B
PY - 2022
DA - 2022/07/09 00:00:00
PB - Multidisciplinary Digital Publishing Institute (MDPI)
SP - 276
IS - 7
VL - 12
SN - 2076-3263
ER -
BibTex |
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BibTex Copy
@article{2022_Chuvilin
author = {Valentina Ekimova and Dinara Davletshina and Ekaterina Krivokhat and Vladimir Shilenkov and E.M. Chuvilin and B Bukhanov},
title = {Migration of Salt Ions in Frozen Hydrate-Saturated Sediments: Temperature and Chemistry Constraints},
journal = {Geosciences (Switzerland)},
year = {2022},
volume = {12},
publisher = {Multidisciplinary Digital Publishing Institute (MDPI)},
month = {jul},
url = {https://doi.org/10.3390%2Fgeosciences12070276},
number = {7},
pages = {276},
doi = {10.3390/geosciences12070276}
}
MLA
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MLA Copy
Chuvilin, E.M., et al. “Migration of Salt Ions in Frozen Hydrate-Saturated Sediments: Temperature and Chemistry Constraints.” Geosciences (Switzerland), vol. 12, no. 7, Jul. 2022, p. 276. https://doi.org/10.3390%2Fgeosciences12070276.
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