(122e) Energy Dissipation for Co2 Injection with a Static Mixer for Ocean Sequestration

In previous research, we have proposed the CO2 injection method using a static mixer for CO2 ocean sequestration and investigated the formation and distribution of CO2 drop in a Kenics type static mixer. This work focused on the energy of CO2 drop formation and the energy dissipation in the static mixer. The energy of CO2 drop formation can be regarded as the surface energy of CO2 drops. The surface energy of CO2 drop is dependent on the surface tension and the drop diameter. In the case of our concept for the CO2 injection, the formation of CO2 hydrate on the drop surface alters the surface energy of CO2 drop because of variation of the surface tension. The rate of energy dissipation in a static mixer is dependent on the pressure drop. Because the pressure drop is expressed as a function of the friction coefficient and the number of the mixing elements in a static mixer, the energy dissipation in the static mixer depends on hydrate formation, number of mixing elements, and shape of the mixing element. In the experimental results, the CO2 drop formation energy can be well correlated with the energy dissipation in the static mixer.