Energies | |
Formation and Dissociation of Methane Hydrates from Seawater in Consolidated Sand: Mimicking Methane Hydrate Dynamics beneath the Seafloor | |
Prasad B. Kerkar1  Kristine Horvat2  Devinder Mahajan2  | |
[1] Shell International Exploration and Production Inc., 3333 Hwy 6 South, M-1018, Houston, TX 77082, USA;Materials Science and Engineering, 314 Old Engineering, Stony Brook University, Stony Brook, NY 11794, USA; E-Mails: | |
关键词: methane; hydrates; seawater; Ottawa sand; formation; dissociation; enthalpy; | |
DOI : 10.3390/en6126225 | |
来源: mdpi | |
【 摘 要 】
Methane hydrate formation and dissociation kinetics were investigated in seawater-saturated consolidated Ottawa sand-pack under sub-seafloor conditions to study the influence of effective pressure on formation and dissociation kinetics. To simulate a sub-seafloor environment, the pore-pressure was varied relative to confining pressure in successive experiments. Hydrate formation was achieved by methane charging followed by sediment cooling. The formation of hydrates was delayed with increasing degree of consolidation. Hydrate dissociation by step-wise depressurization was instantaneous, emanating preferentially from the interior of the sand-pack. Pressure drops during dissociation and
【 授权许可】
CC BY
© 2013 by the authors; licensee MDPI, Basel, Switzerland.
【 预 览 】
Files | Size | Format | View |
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RO202003190031013ZK.pdf | 8238KB | download |