Characteristics of CO2 Hydrate Production with Mechanical Enhancement

It is a challenge technique to capture and storage CO₂ by hydrate crystallization. In order to increase the hydrate formation rate and decrease the energy consumption, the effect of different stirring times on CO₂ hydrate formation was carried out experimentally in a small scale reactor. The results showed that the stirring could improve the CO₂ gas dissolution rate effectively during the hydrate formation process. CO₂ gas reached dissolution saturation in only three minutes with the stirring rate of 250r/min, while this process required about 100 minutes without stirring. In addition, it was found that stirring is extremely favorable for the hydrate formation when it occurs during the temperature cooling down process. With 40-munite stirring in the temperature cooling down process, the hydrate formation showed almost the same effect to that introduced by 200 minutes stirring, and the energy consumption was reduced significantly.