Effect of CO2 concentration on the performance of different thermodynamic models for prediction of CH4+CO2+H2O hydrate equilibrium conditions

Bahman Zarenezhad; Mona Mottahedin; Ali Haghighi Asl

Korean Journal of Chemical Engineering, Vol.28, No.3, 949-953, March, 2011

DOI10.1007/s11814-010-0422-1 Export Citation

Effect of CO2 concentration on the performance of different thermodynamic models for prediction of CH4+CO2+H2O hydrate equilibrium conditions

Bahman Zarenezhad^†, Mona Mottahedin, and Ali Haghighi Asl

School of Chemical, Petroleum and Gas Engineering, Semnan University, P. O. Box 35195-363, Semnan, Iran

E-mail:

Accurate prediction of phase equilibria regarding CH4 replacement in hydrate phase with high pressure CO2 is an important issue in modern reservoir engineering. In this work we investigate the possibility of establishing a thermodynamic framework for predicting the hydrate equilibrium conditions for evaluation of CO2 injection scenarios. Different combinations of equations of state and mixing rules are applied and the most accurate thermodynamic models at different CO2 concentration ranges are proposed.

Keywords:Gas Hydrate;Phase Equilibrium;CO2 Injection;Methane Replacement;Reservoir

[References]

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[1] Milkov AV, Earth Science Reviews., 66, 183 (2004)

[2] Chatti I, Delahaye A, Fournaison L, Petitet JP, Energy Conv. Manag., 46(9-10), 1333 (2005)

[3] Gunn DA, Nelder LM, Rochelle CA, Bateman K, Jackson PD, Lovell MA, Hobbs PRN, Long D, Rees JG, Schultheiss P, Roberts J, Francis T, Terra Nova., 14, 43 (2002)

[4] Ohgaki K, Takano K, Sangawa H, Matsubara T, Nakano S, J. Chem. Eng. Jpn., 29(3), 478 (1996)

[5] Lee H, Seo Y, Moudrakovski IL, Ripmeester A, Angew. Chem. Int. Ed., 42, 5084 (2003)

[6] Yezdimer EM, Cummings PT, Chialvo AA, J. Phys. Chem., 106, 7982 (2002)

[7] Komai T, Kawamura T, Kang S, Nagashima K, Yamamoto Y, J. Phys. Condens Matter., 14, 1395 (2002)

[8] Hirohama S, Shimoyama Y, Wakabayashi A, Tatsuta S, Nishida N, J. Chem. Eng. Jpn., 29(6), 1014 (1996)

[9] Sloan ED, Koh CA, Clathrate hydrates of natural gases., Chemical Industries, CRC Press, 3rd Ed. (2008)

[10] Soave G, Chem. Eng. Sci., 4, 1197 (1972)

[11] Valderrama JO, J. Chem. Eng. Japan., 23, 87 (1990)

[12] Avlonitis D, Danesh A, Todd AC, Fluid Phase Equilib., 94, 181 (1994)