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NMR transverse relaxation times and phase equilibria of methane hydrate in mesoporous alumina Full article

Journal Chemical Engineering Science
ISSN: 1873-4405 , E-ISSN: 0009-2509
Output data Year: 2024, Volume: 299, Article number : 120436, Pages count : 8 DOI: 10.1016/j.ces.2024.120436
Tags gas hydrate, methane, mesoporous alumina, confined melting, NMR transverse relaxation time
Authors Manakov Andrey Y. 1,2 , Shumskayte Mariya Y. 3 , Mezin Andrey A. 3 , Adamova Tatiana P. 1 , Semenov Matvei E. 2 , Stoporev Andrey S. 1,4
Affiliations
1 Nikolaev Institute of Inorganic Chemistry SB RAS
2 Kazan Federal University
3 Trofimuk Institute of Petroleum Geology and Geophysics SB RAS
4 Gubkin University

Abstract: The processes of formation (and decomposition) of methane hydrate from water adsorbed in the pores of spherical granules of mesoporous alumina (Al2O3) have been investigated using the low-field NMR spin–spin relaxation time (T2) and DSC methods. Analysis of the obtained data showed that changes observed in the relaxation time spectra represent a strong case in favor of the model envisaging hydrate growth in pore spaces without conspicuous water transfer through the volume content of the sample with mesoporous structure. As the supercooling strength of the liquid phase enhances, the size of the pores in which hydrate formation takes place decreases. At this, the size of the hydrate particles previously formed in larger pores tends to increase. Hydrate nucleation was shown to be followed by intensive and rapid hydrate formation in some parts of the alumina granules in the sample. The “skipping” mechanism of hydrate formation between granules remains unclear.
Cite: Manakov A.Y. , Shumskayte M.Y. , Mezin A.A. , Adamova T.P. , Semenov M.E. , Stoporev A.S.
NMR transverse relaxation times and phase equilibria of methane hydrate in mesoporous alumina
Chemical Engineering Science. 2024. V.299. 120436 :1-8. DOI: 10.1016/j.ces.2024.120436 WOS Scopus РИНЦ OpenAlex
Dates:
Published print: Nov 5, 2024
Identifiers:
Web of science: WOS:001267603100001
Scopus: 2-s2.0-85197494203
Elibrary: 68836466
OpenAlex: W4400133084
Citing: Пока нет цитирований
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