Methane Clathrate Hydrates Formed within Hydrophilic and Hydrophobic Media: Kinetics of Dissociation and Distortion of Host Structure

Takeya, S.; Fujihisa, H.; Gotoh, Y.; Istomin, V.; Chuvilin, E.; Sakagami, H.; Hachikubo, A.

Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 5 апреля 2013 г.

Авторы: Takeya S., Fujihisa H., Gotoh Y., Istomin V., Chuvilin E., Sakagami H., Hachikubo A.
Журнал: Journal of Physical Chemistry C
Том: 117
Номер: 10
Год издания: 2013
Издательство: American Chemical Society
Местоположение издательства: United States
DOI: 10.1021/jp312297h
Аннотация: ABSTRACT: The crystal structure and dissociation processes of methane (CH4) hydrates were investigated to better understand their stability in a natural environment. By using powder X-ray diffraction, we found that the unit-cell parameters of the hydrates formed with fine hydrophilic and hydrophobic beads were respectively larger and smaller by 0.02 Å than the unit-cell parameters of simple CH4 hydrates. In addition, it was found that CH4 hydrates formed with hydrophobic beads dissociated quickly above 200 K, whereas the CH4 hydrates formed with hydrophilic beads are stable up to about 273 K (Hachikubo et al. Phys. Chem. Chem. Phys. 2011, 13, 17449−17452). The interfacial forces inside the intergranular pores or void spaces of the beads affect the kinetics of dissociation of CH4 hydrate and are important for both the macroscopic and the crystallographic structures.
Добавил в систему: Чувилин Евгений Михайлович

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Methane Clathrate Hydrates Formed within Hydrophilic and Hydrophobic Media: Kinetics of Dissociation and Distortion of Host Structureстатья

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