O3 concentration in O3-containing clathrate hydrate formed by a continuous process is predicted using the thermodynamic simulation in which the hydrate-forming process is assumed to be a series of numerous equilibrium states each slightly deviating from the preceding state. The thermodynamic simulation was originally developed for natural gas hydrate. In this study, the simulation was modified to take account of O3 self-decomposition. The O3 decomposition rate was experimentally measured in the (O3 + O2 + CO2) system to be used for the material balance calculation model. The phase-equilibrium calculation model used in this study was validated by comparison of the experimental O3 concentration in hydrate to that calculated. The thermodynamic simulation indicated that the O3 concentration in hydrate increased with an increase in the fraction of the gas discharged from the reactor. The higher rate of hydrate formation increased the O3 concentration in hydrate asymptotically. This study revealed that the O3 mass concentration in hydrate formed in a continuous process was the order of percent, which was a hundred times greater than that in the other O3 storage technologies such as ozonated ice and ozonated water.
ASJC Scopus subject areas
- 化学 (全般)