Kinetics of decay of highly non-equilibrium metastable states of gas saturated amorphous ice in the presence of artificially introduced crystal centers

被引：2

作者：

Faizullin, M. Z. ^{[1
]}

Vinogradov, A. V. ^{[1
]}

Tomin, A. S. ^{[1
]}

Koverda, V. P. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Thermal Phys, Ural Branch, Amundsen St 107a, Ekaterinburg 620016, Russia

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2019年 / 143卷

基金：

俄罗斯基础研究基金会;

关键词：

Amorphous ice; Metastable state; Condensation; Crystallization; Methane; Gas hydrate; UNEXPECTEDLY STABLE NITROGEN; HYDRATE FORMATION; EXPLOSIVE CRYSTALLIZATION; METHANE HYDRATE; SOLID WATER; NUCLEATION; LAYERS; LIQUID; CONDENSATION; OXYGEN;

D O I：

10.1016/j.ijheatmasstransfer.2019.118592

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The conditions of the emergence of self-sustaining (explosive) crystallization in amorphous substances under intense non-steady state nucleation that occur during the formation of gas hydrates in low-temperature water-gas condensates prepared by a condensation method have been analyzed. The possibility of a spontaneous occurrence of hot crystallization centers in places of random accumulation of fluctuation-induced nuclei capable of causing local heating and transition to the explosive mode of crystallization in a non-equilibrium amorphous medium has been discussed. The stability of methane saturated amorphous ice layers with crystallization centers introduced artificially has been experimentally investigated. The presence of crystal nuclei in non-equilibrium gas-saturated amorphous condensates shifted the beginning of crystallization to the region of low temperatures. Crystallization took place in several stages. The behavior of DTA thermograms pointed to its development from different hot centers. In conditions of deep metastability, a spontaneous crystallization mode is realized, which ensures the capture of gas molecules and the formation of a gas hydrate. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：7

共 43 条

[1] Gas hydrate plug formation in partially-dispersed water-oil systems [J].

Akhfash, Masoumeh ;

Aman, Zachary M. ;

Ahn, Sang Yoon ;

Johns, Michael L. ;

May, Eric F. .

CHEMICAL ENGINEERING SCIENCE, 2016, 140 :337-347

[2] TRAPPING AND RELEASE OF GASES BY WATER ICE AND IMPLICATIONS FOR ICY BODIES [J].

BARNUN, A ;

HERMAN, G ;

LAUFER, D ;

RAPPAPORT, ML .

ICARUS, 1985, 63 (03) :317-332

[3] Formation and decomposition of gas hydrates [J].

Bishnoi, PR ;

Natarajan, V .

FLUID PHASE EQUILIBRIA, 1996, 117 (1-2) :168-177

[4]

BOGDANOV NM, 1987, DOKL AKAD NAUK SSSR+, V293, P595

[5] Capillary effects on phase behavior of liquid and gaseous propane and dynamics of hydrate formation and dissociation in porous media [J].

Buleiko, V. M. ;

Grigoriev, B. A. ;

Istomin, V. A. .

FLUID PHASE EQUILIBRIA, 2017, 441 :64-71

[6] Insights into the formation mechanism of hydrate plugging in pipelines [J].

Chen, Jun ;

Yan, Ke-Le ;

Chen, Guang-Jin ;

Sun, Chang-Yu ;

Liu, Bei ;

Ren, Ning ;

Shen, De-Ji ;

Niu, Meng ;

Lv, Yi-Ning ;

Li, Nan ;

Sum, Amadeu K. .

CHEMICAL ENGINEERING SCIENCE, 2015, 122 :284-290

[7] Hydrate formation in the cyclic process of refrigerant boiling condensation in a water volume [J].

Chernov, A. A. ;

Elistratov, D. S. ;

Mezentsev, I. V. ;

Meleshkin, A. V. ;

Pil'nik, A. A. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2017, 108 :1320-1323

[8] New hydrate formation methods in a liquid-gas medium [J].

Chernov, A. A. ;

Pil'nik, A. A. ;

Elistratov, D. S. ;

Mezentsev, I. V. ;

Meleshkin, A. V. ;

Bartashevich, M. V. ;

Vlasenko, M. G. .

SCIENTIFIC REPORTS, 2017, 7

[9] The processes of dissolution and hydrate forming behind the shock wave in the gas-liquid medium with gas mixture bubbles [J].

Chernov, A. A. ;

Dontsov, V. E. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2011, 54 (19-20) :4307-4316

[10]

Chernov A. A., 1984, MODERN CRYSTALLOGRAP, P48

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