Enviar artigo por via de e-mail Hydrate Formation in Gas-Saturated Layers of Amorphous Ice with Crystalline Nuclei
- Autores: Faizullin M.Z.1, Tomin A.S.1, Vinogradov A.V.1, Koverda V.P.1
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Afiliações:
- Institute of Thermal Physics, Ural Branch of the Russian Academy of Sciences
- Edição: Volume 99, Nº 8 (2025)
- Páginas: 1201-1206
- Seção: PHYSICAL CHEMISTRY OF NANOCLUSTERS, SUPRAMOLECULAR STRUCTURES, AND NANOMATERIALS
- ##submission.dateSubmitted##: 06.11.2025
- ##submission.datePublished##: 15.08.2025
- URL: https://bakhtiniada.ru/0044-4537/article/view/349973
- DOI: https://doi.org/10.7868/S3034553725080105
- ID: 349973
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Resumo
The formation of propane hydrate in gas-saturated condensates of amorphous ice in the presence of nucleated crystals has been studied. Amorphous gas-saturated layers were obtained by condensation of supersonic flows of rarefied vapor and gas on a liquid nitrogen cooled substrate. Samples were prepared using both parallel flows with orientation normal to the substrate and at an angle to it towards each other. The formation of ice nanocrystals during adiabatic expansion of the vapor flow at the supersonic nozzle exit ensured their presence in the condensates. Changes in the specific surface density (porosity) of amorphous gas-saturated condensates at changing the orientation of flows with respect to the substrate and the presence of nucleated crystals in nonequilibrium condensates affect their stability and crystallization kinetics. Under conditions of deep metastability, a spontaneous crystallization mode with the capture of adsorbed gas molecules and the formation of gas hydrate is realized. The crystallized condensates contained high gas content exceeding its value for hydrate in the equilibrium state. Excessive gas content indicates the presence of gas in the intergranular space and porous medium of the sample.
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Sobre autores
M. Faizullin
Institute of Thermal Physics, Ural Branch of the Russian Academy of Sciences
Email: faizullin@itpuran.ru
Ekaterinburg, Russia
A. Tomin
Institute of Thermal Physics, Ural Branch of the Russian Academy of SciencesEkaterinburg, Russia
A. Vinogradov
Institute of Thermal Physics, Ural Branch of the Russian Academy of SciencesEkaterinburg, Russia
V. Koverda
Institute of Thermal Physics, Ural Branch of the Russian Academy of SciencesEkaterinburg, Russia
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