| 초록 |
Gas hydrate-based CO2 capture process has advantages of economic feasibility and environmentally friendliness over other competing technologies such as adsorption, absorption, and membrane separation. The efficiency of such a process relies on the rate of hydrate formation. A mechanical mixing is commonly applied to enhance gas/liquid mass transfer, but it is not preferred to a large-scale process due to significant operational/energy costs. Therefore, gas hydrate formation in porous media such as ‘silica sand, zeolite’ is gaining a great deal of attention. Here, we studied CO2 hydrate formation in surface-modified silica sand with different sizes. By selecting a different silane coupling agent, the hydrophobicity of the silica sand can be controlled. According to the experimental results, the surface modification dramatically increases the rate of hydrate formation. The present findings would be suitable for scaling up the hydrate-based CO2 capture process. |
