CO₂ Hydrate Formation and Dissociation in Cooled Porous Media: A Potential Technology for CO₂ Capture and Storage

Abstract

The purpose of this study was to investigate the hydrate formation and dissociation with CO2 flowing through cooled porous media at different flow rates, pressures, temperatures, and flow directions. CO2 hydrate saturation was quantified using the mean intensity of water. The experimental results showed that the hydrate block appeared frequently, and it could be avoided by stopping CO2 flooding early. Hydrate formed rapidly as the temperature was set to 274.15 or 275.15 K, but the hydrate formation delayed when it was 276.15 K. The flow rate was an important parameter for hydrate formation; a too high or too low rate was not suitable for CO2 hydration formation. A low operating pressure was also unacceptable. The gravity made hydrate form easily in the vertically upward flow direction. The pore water of the second cycle converted to hydrate more completely than that of the first cycle, which was a proof of the hydrate "memory effect". When the pressure was equal to atmospheric pressure, hydrate did not dissociate rapidly and abundantly, and a long time or reduplicate depressurization should be used in industrial application.

Effect of different fixed bed media on the performance of sodium dodecyl sulfate for hydrate based CO 2 capture

“…Natural gas hydrates occur on various parts of the earth and are the biggest untapped source of natural gas present to mankind at the moment [19][20][21][22][23][24]. Hydrate based desalination, water treatment, gas separation and sequestration and gas storage are some of the other potential applications of gas hydrates [25][26][27][28][29][30][31][32][33]. A new idea that has recently generated widespread interest is the simultaneous recovery of methane and storage of CO 2 .…”

Gas Hydrate Growth Kinetics: A Parametric Study

“…More recently, there has been increased interest in the potential applications of gas-hydrate-related technology in the areas of gas separation [5][6][7][8][9][10][11], gas transportation and storage [12][13][14][15][16][17][18][19][20][21][22][23], CO 2 capture and sequestration [11,13,[17][18][19][20][21][22][23][24][25][26][27][28][29][30], and as a potential energy source [20,[31][32][33][34]. In the area of gas transportation and storage, gas hydrate technology offers simplicity and safer conditions.…”

Existence of a memory effect between hydrates with different structures (I, II, and H)

“…Clathrate hydrates naturally occur in permafrost regions or beneath the sea floor under the high pressures and low temperatures suitable for their formation (Koh et al, 2012;Milkov, 2004). Synthetic clathrate hydrates have recently been explored for the storage of natural gas and hydrogen (Biyuan, 2000;Belosludov et al, 2007;Matsumoto et al, 2014), gas separation Eslamimanesh et al, 2012), greenhouse gas control (Yang et al, 2013;Linga et al, 2007Linga et al, , 2010, desalination of seawater (Park et al, 2011), and prevention of hydrate blockages in oil and gas pipelines (Sloan, 2003). Therefore, to advance these applications, it is essential to understand the formation and decomposition of hydrates.…”