Estimation of the Formation Rate Constant of Methane Hydrate in Porous Media

Autor:	Shinichiro Hirabayashi, Fumio Kiyono, Toru Sato, Ayako Fukumoto
Rok vydání:	2013
Předmět:	chemistry.chemical_compound Materials science chemistry Chemical engineering Energy Engineering and Power Technology Geotechnical Engineering and Engineering Geology Porous medium Hydrate Constant (mathematics) Formation rate Methane
Zdroj:	Scopus-Elsevier
ISSN:	1930-0220 1086-055X
DOI:	10.2118/163097-pa
Popis:	Summary Hydrate formation and the relevant mass and heat transfers were numerically analyzed in a microscopic computational domain in which spherical glass beads, water, and methane gas were distributed separately. A hydrate-formation experiment was also carried out by use of a cylindrical pressure cell. The temperature in the cell was controlled by Peltier devices, which were attached to the outer walls of the cell to imitate the adiabatic boundary condition present in the numerical simulation. By history matching between the experiment and calculation, we first obtained a hydrate-formation rate constant per unit volume of water, assuming homogeneous nucleation. Then, after converting the rate by use of a surface-area model of water in porous media, we noted that the area-based rate constant and activation energy of the hydrate formation were estimated to be 6.33 × 1034 mol·m–2 Pa–1 s–1 and 238 × 103 J/mol, respectively, for temperatures of 1.5 to 3.4°C.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3921415ada8266621e6c56a286f71552 https://doi.org/10.2118/163097-pa Zobrazit plný text záznamu