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Kinetics and Mechanism of the Formation of CO_{2} Hydrate

Y. Shindo, P. C. Lund, Y. Fujioka and H. Komiyama
[Int. J. Chem. Kinet., Vol. 25, pp. 777-782, 1993]


This article proposes a mechanism of CO_{2} hydrate formation taking into account both diffusion and reaction, and gives an analysis of its kinetics. The most important assumptions on the model are that water dissolves into liquid CO_{2} and reacts to form CO_{2} hydrate, and that the hydrate blocks the dissolution and diffusion of water. Computational simulations were conducted, and the model proposed explains well the many observations on the CO_{2} hydrate formation in previous articles. Figure 1 shows a simulation result. It is concluded that liquid CO_{2} disposed in a deep ocean will form a very thin film of CO_{2} hydrate, and this will greatly control the CO_{2} diffusion in the ocean.

Fig.1