Abstract
The study introduces a pioneering model for hydrate-based gas separation technology, which enhances the prediction method for the coexistence of multiple structure hydrates. The calculated results demonstrate strong agreement with 96 sets of experimental data, exhibiting a lower average relative deviation of 8.00 % compared to the traditional model’s average relative deviation of 60.00 %. Furthermore, it offers a comprehensive discussion on the composition of hydrate structures in (H2 + CH4 + C2H6 + C3H8) during gas–water-hydrate equilibrium, providing a more precise depiction of hydrate structure evolution. Additional gas-hydrate equilibrium experiments were conducted for the (H2 + CH4 + C2H6 + C3H8) system to optimize the model parameters. The fitting goodness of the hydrate structure transformation formula (niI-Si formula) is enhanced from 0.9162 to 0.9816.
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