Temperature Variation during Salt Migration in Frozen Hydrate-Bearing Sediments: Experimental Modeling
Salt migration may be another reason why pore-gas hydrates dissociate in permafrost, besides pressure and temperature changes. Temperature variations in frozen hydrate-saturated sediments interacting with a NaCl solution have been studied experimentally at a constant temperature, ~−6 °C typical for permafrost. The experiments with frozen sandy samples containing metastable methane hydrate show that the migration of Na+ ions in the NaCl solution and their accumulation in the sediments can induce heat-consuming hydrate dissociation and ice melting. The hydrate-saturated frozen soils cool down at higher rates than their hydrate-free counterparts and require more time to recover their initial temperature. The temperature effects in hydrate-saturated frozen sediments exposed to contact with NaCl solutions depend strongly on salt concentration. The experimental results are used to model phase changes in the pore space associated with salt-ions transport and provide insights into the reasons for temperature changes.
Citations by journals
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Geosciences (Switzerland)
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Geosciences (Switzerland)
2 publications, 40%
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Frontiers in Energy Research
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Frontiers in Energy Research
1 publication, 20%
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Cold Regions Science and Technology
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Cold Regions Science and Technology
1 publication, 20%
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Energy & Fuels
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Energy & Fuels
1 publication, 20%
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Citations by publishers
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Multidisciplinary Digital Publishing Institute (MDPI)
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Multidisciplinary Digital Publishing Institute (MDPI)
2 publications, 40%
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Frontiers Media S.A.
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Frontiers Media S.A.
1 publication, 20%
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Elsevier
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Elsevier
1 publication, 20%
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American Chemical Society (ACS)
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American Chemical Society (ACS)
1 publication, 20%
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