Modeling Heating Curve for Gas Hydrate Dissociation in Porous Media

Autor:	Gérard Marion, Anatoliy N. Nesterov, A. Graciaa, Christophe Dicharry, Pascal Gayet
Rok vydání:	2005
Předmět:	Capillary action Chemistry Isochoric process Clathrate hydrate Thermodynamics Dissociation (chemistry) Methane Surfaces Coatings and Films chemistry.chemical_compound Materials Chemistry Physical and Theoretical Chemistry Shape factor Hydrate Porous medium
Zdroj:	The Journal of Physical Chemistry B. 109:17205-17211
ISSN:	1520-5207 1520-6106
DOI:	10.1021/jp0504975
Popis:	A method for modeling the heating curve for gas hydrate dissociation in porous media at isochoric conditions (constant cell volume) is presented. This method consists of using an equation of state of the gas, the cumulative volume distribution (CVD) of the porous medium, and a van der Waals-Platteeuw-type thermodynamic model that includes a capillary term. The proposed method was tested to predict the heating curves for methane hydrate dissociation in a mesoporous silica glass for saturated conditions (liquid volume = pore volume) and for a fractional conversion of water to hydrate of 1 (100% of the available water was converted to hydrate). The shape factor (F) of the hydrate-water interface was found equal to 1, supporting a cylindrical shape for the hydrate particles during hydrate dissociation. Using F = 1, it has been possible to predict the heating curve for different ranges of pressure and temperature. The excellent agreement between the calculated and experimental heating curves supports the validity of our approach.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ddbd5abf0fc14096d25d11b8548acaae https://doi.org/10.1021/jp0504975 Zobrazit plný text záznamu