Abstract
Large amounts of CH4 are stored as hydrates on continental margins and permafrost regions. If the CH4 hydrates could be converted into CO2 hydrate, they would serve double duty as CH4 sources and CO2 storage sites in the deep ocean sediments. As preliminary investigations, both the phase behavior of CH4 hydrates and kinetic behavior of CO2 hydrate were measured at versatile conditions that can simulate actual marine sediments. When measuring three-phase equilibria (H-LW-V) containing CH4 hydrate, we also closely examined pore and electrolyte effects of clay and NaCl on hydrate formation. These two effects inhibited hydrate nucleation and thus made the hydrate equilibrium line shift to a higher pressure region. In addition, the kinetic data of CO2 hydrate in the mixtures containing clay and NaCl were determined at 2.0 MPa and 274.15 K. Clay mineral accelerated an initial formation rate of CO2 hydrate by inducing nucleation as initiator, but total amount of formed CO2, of course, decreased due to the capillary effect of clay pores. Also, the addition of NaCl in sample mixtures made both initial formation rate and total amount of CO2 consumption decrease.
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References
Bishinoi, P. R. and Natarajan, V., “Formation and decomposition of gas hydrates,”Fluid Phase Equilibria,117, 173 (1996)
Brewer, P. G., Goyet, C. and Friederich, G., “Direct observation of the oceanic CO2 increase revisited,”Proc. Natl. Acad. Sci. U.S.A.,94, 8308 (1997).
Chun, M.-K. and Lee, H., “Kinetics of formation of carbon dioxide clathrate hydrates,”Korean J. Chem. Eng.,13, 620 (1996)
Deaton, W. M. and Frost, E. M. Jr., Gashydrates and there relation to the operation of natural-gas pipe lines, U.S. Bureau of Mines Monograph,8 (1946).
Englezos, P., “Clathrate hydrates,”Ind. Eng. Chem. Res.,32, 1255 (1993).
Handa, Y. P. and Stupin, D. Y., “Thermodynamic properties and dissociation characteristics of methane and propane hydrates in 70-.ANG.- radius silica gel pores,”J. Phys. Chem.,96, 8599 (1992).
Jeffrey, G A.,Inclusion compounds, Vol. 1, Academic Press, London (1984).
Kim, D.-Y., Uhm, T.-W. and Lee, H., “Compositional and structural identification of natural gas hydrates collected at site 1249 on ocean drilling program leg 204,”Korean J. Chem. Eng.,22, 569 (2005).
Kvenvolden, K. A.,International conference on natural gas hydrates, Vol. 715, Ann. N. Y. Acad. Sci. (1994).
Lee, H., Seo, Y., Seo, Y.-T., Moudrakovski, I. L. and Pipmeester, J. A., “Recovering methane from solid methane hydrate with carbon dioxide,”Angew. Chem. Int. Ed.,115, 5202 (2003).
Lee, J.-W., Chun, M.-K., Lee, K.-M., Kim, Y.-J. and Lee, H., “Phase equilibria and kinetic behavior of CO2 hydrate in electrolyte and porous media solution: application to ocean sequestration of CO2,”Korean J. Chem. Eng.,19, 673 (2002a).
Lee, K.-M. and Lee, H., “CO2 hydrate behavior in the deep ocean sediments; phase equilibrium, formation kinetics, and solubility,”Geophysical Research Letters,29, 1029 (2002b).
Makogon, Y. F.,Natural gas hydrate: the state of study in the USSR and perspectives for its use, the 3rd International Chemical Congress of North America, Toronto, Cananda (1988).
Ridley, I. and Dominic, K., “Gas hydrates keep energy on ice,”New Sci.,117, 53 (1988).
Seo, Y., Lee, H. and Uchida, T., “Methane and carbon dioxide hydrate phase behavior in small porous silica gels: three-phase equilibrium determination and thermodynamic modeling,”Langmuir,18, 9164 (2002).
Sloan, Jr. E. D.,Clathrate hydrates of natural gases, 2nd ed., Marcel Dekker, New York (1998).
Sloan, Jr. E. D., “Fundamental principles and applications of natural gas hydrates,”Nature,426, 353 (2003).
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Park, Y., Lee, J., Shin, K. et al. Phase and kinetic behavior of the mixed methane and carbon dioxide hydrates. Korean J. Chem. Eng. 23, 283–287 (2006). https://doi.org/10.1007/BF02705728
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DOI: https://doi.org/10.1007/BF02705728