Dissociation Conditions of Methane Hydrate in Mesoporous Silica Gels in Wide Ranges of Pressure and Water Content | Sciact - CRIS-система Института катализа

Dissociation Conditions of Methane Hydrate in Mesoporous Silica Gels in Wide Ranges of Pressure and Water Content Научная публикация

Журнал

The Journal of Physical Chemistry B
ISSN: 1520-6106 , E-ISSN: 1520-5207

Вых. Данные

Год: 2004, Том: 108, Номер: 42, Страницы: 16540-16547 Страниц : 8 DOI: 10.1021/jp048389q

Ключевые слова

Data reduction; Dissociation; Interfacial energy; Natural gas; Phase transitions; Pore size; Silica gel; Stabilization; Thermodynamics; Water

Авторы

Aladko Eugeny Ya. ¹ , Dyadin Yury A. ¹ , Fenelonov Vladimir B. ² , Larionov Eduard G. ¹ , Melʹgunov Maxim S. ² , Manakov Andrej Yu. ¹ , Nesterov Anatoly N. ³ , Zhurko Fridrikh V. ¹

Организации

1	Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Prospekt Akad. Lavrentieva, Novosibirsk, 630090, Russian Federation
2	Boreskov Institute of Catalysis SB RAS, 5 Prospekt Akad. Lavrentieva, Novosibirsk, 630090, Russian Federation
3	Institute of Earth Cryosphere SB RAS, 86, Malygina str., Tyumen, 625026, Russian Federation

Информация о финансировании (4)

1	Российский фонд фундаментальных исследований	03-03-32020
2	Российский фонд фундаментальных исследований	04-03-32578
3	Совет по грантам Президента Российской Федерации	НШ-2120.2003.3
4	Сибирское отделение Российской академии наук	147

The temperature of methane hydrate dissociation in silica mesopores has been monitored within a wide range of pressures from 10 MPa to 1 GPa. Because the determination of pore size appears to be crucial for the studied phenomenon, several methods of calculation have been applied. According to our findings, the size that corresponds to the mean size of the most representative pores is to be considered as the most reliable. It was concluded that the shape of hydrate particles replicates a host space of pores and may have a complex (e.g., fractal) shape. An attempt to simulate the curvature of hydrate particles by globular (quasi-spherical), elongated (quasi-cylindrical), or any intermediate models has been done. The quasi-spherical model seems to be more adequate for hydrate particles in small pores (<8 nm), while the quasi-cylindrical model fits better the experimental data for hydrate particles in larger pores. According to our experimental results, the hydrate can be formed in pores only by capillary condensate, without involving the water layers tightly bound by the surface, and pressure has an insignificant effect on the decrease of the dissociation temperature of the confined hydrate. A new effect of the formation of hydrates at a temperature higher than the bulk hydrate dissociation temperature has been observed for silica gels with the narrowest pores studied.

Aladko E.Y. , Dyadin Y.A. , Fenelonov V.B. , Larionov E.G. , Melʹgunov M.S. , Manakov A.Y. , Nesterov A.N. , Zhurko F.V.
Dissociation Conditions of Methane Hydrate in Mesoporous Silica Gels in Wide Ranges of Pressure and Water Content
The Journal of Physical Chemistry B. 2004. V.108. N42. P.16540-16547. DOI: 10.1021/jp048389q WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	13 апр. 2004 г.
Принята к публикации:	30 июл. 2004 г.
Опубликована в печати:	1 окт. 2004 г.

Web of science:	WOS:000224539100032
Scopus:	2-s2.0-7544225490
РИНЦ:	13460231
Chemical Abstracts:	2004:790121
Chemical Abstracts (print):	141:416421
OpenAlex:	W2016490229

БД	Цитирований
Web of science	31
Scopus	38
РИНЦ	44
OpenAlex	36