Phase equilibrium for methane, ethane and carbon dioxide hydrates at pressures up to 100 MPa through high-pressure microcalorimetry: Experimental data, analysis and modeling

Numerical Investigation of CO2 Storage Capacity via Hydrate in Deep-Sea Sediments

“…When the phase equilibrium temperature was higher than the injection temperature, CO 2 was able to be converted to solid deposition as soon as it was injected. Therefore, fitting the phase equilibrium curves of Menezes 57 and Niu 44 resulted in less CO 2 storage, even lower than the case with no chemical reaction. Figure 9 shows the schematic diagram of the variation of CO 2 hydrate saturation with different phases of equilibrium.…”

“…Laboratory studies focus mainly on the low-temperature and low-pressure parts. In the case of numerical simulations, the phase equilibrium relations used are not only from experiments but also from curves calculated by different simulation software. ,, The different setup conditions could also result in deviations. The CO 2 hydrate phase equilibrium obtained from the PVTsim simulation is more similar to Niu’s simulations and Menezes’s experimental results, with a difference of about 1 °C.…”

“…Bai et al 56 simulated the phase equilibrium curves of CO 2 hydrate formation using PipeSim software. Menezes et al 57 tested the phase equilibrium data of CO 2 hydrate using high-pressure microcalorimetry and compared it with CSMGem and Multiflash. Niu et al 44 measured the phase equilibrium curves of various gas hydrate mixtures using CSMGem software.…”