Gas Hydrate Process for Recovery of CO2 from Fuel Gas

Thermodynamic measurements were performed to show that it is possible to recover CO2 from fuel gas (the mixture of CO2 and H-2) by forming gas hydrates that removes CO2 using water dispersed in the pores of silica gel particles. Hydrate phase equilibria for the ternary CO2-H-2-water-in-pores were measured. In addition, the direct measurement of CO2 content in hydrate phase shows that the obtained gas from the dissociation of hydrate contains more than 95 mol.% of CO2. Compared with data obtained in case of bulk water hydrates, which shows just 70 mol.% of CO2, the hydrate formation in porous silica gel enhances the feasibility of CO2 separation process. Hydrate formation in porous solid particle makes it possible to use fixed bed or fluidized bed reactor, which can be advantageous due to the application of well-understood technologies in the industrial field.