Kinetics on the dissolution of CO2 into water from the surface of CO2 hydrate at high pressure

Kinetic study on the dissolution of CO₂ from the surface of a liquid CO₂ droplet in water was conducted, and a mechanism of the decay of CO₂ hydrate was proposed. The model was applied to the experimental data which showed that the radius of liquid CO₂ droplets in water reduced linearly with time. It was proved that the dissolution rate of CO₂ into water is dominated by the decay of CO₂ hydrate on the surface of the droplet. The rate constant of the decay of CO₂ hydrate was estimated to be 1.25 × 10^?6 m s^?1. From a viewpoint of liquid CO₂ disposal in the deep ocean, it is predicted that the thin membrane of CO₂ hydrate at the interface between seawater and liquid CO₂ will control the dissolution of CO₂ into seawater. © 1995 John Wiley & Sons, Inc.