Gas hydrate equilibria for CO2–N2 and CO2–CH4 gas mixtures—Experimental studies and thermodynamic modelling

Jean-Michel Herri (1, 2, 3) , Amina Bouchemoua-Benaissa (1, 2, 3) , Matthias Kwaterski (1, 2, 3) , Amara Fezoua (1, 2, 3) , Yamina Ouabbas (1, 2, 3) , Ana Cameirão (1, 2, 3)

1 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels
2 LPMG-EMSE - Laboratoire des Procédés en Milieux Granulaires
3 GENERIC-ENSMSE - Département Géochimie, environnement, écoulement, réacteurs industriels et cristallisation

In this paper, a set of experimental data on the phase equilibrium of gas hydrates in the presence of binary gas mixtures comprising CO2 is presented. The procedure established allows for the determination of both the composition of the gas phase as well as the hydrate phase without the need to sample the hydrate. The experimental results obtained in these measurements have been described by means of the classical model of van der Waals and Platteeuw. The values of internal parameters of the reference state and the Kihara parameters have been re-discussed and their interdependency is pointed. Finally the new set of parameters is validated against experimental data from other sources available in the literature, or invalidated against other sources. Finally, we conclude on the difference of experimental data between laboratories. The differences are not on the classical (pressure, temperature, gas composition) data which appear equivalent between laboratories. The difference stands on the measurement composition of the hydrate phase.

Mots clés: Gas hydrates; Thermodynamic; Crystallization; Modelling

Domaines: Génie des procédés

Jean-Michel Herri, Amina Bouchemoua-Benaissa, Matthias Kwaterski, Amara Fezoua, Yamina Ouabbas, et al.. Gas hydrate equilibria for CO2–N2 and CO2–CH4 gas mixtures—Experimental studies and thermodynamic modelling. Fluid Phase Equilibria, 2011, 301 (2), pp.171-190. ⟨10.1016/j.fluid.2010.09.041⟩. ⟨hal-00564549⟩