| 초록 |
Membrane based separation is considered to be emerging technology enabling cost-effective separation of chemicals and easy operation. Metal-organic frameworks (MOFs) have been substantially studied for membrane because their reticular solid-state structure composed of metals and organic ligands have a flexible conformational-variation. Zeolitic imidazole frameworks (ZIFs) 7, a subcategory of MOFs, based membrane was fabricated on alpha alumina support by dip-coating method. The synthesized well-intergrown and adhesive-to-support membrane was explored to separate 4 mixed gas of H2, CO, CO2, and CH4 from 423 K to 573 K. The gas permeation test of the ZIF-7 membrane showed great gas permeation (4 x 10-7 mol m-2 s-1 Pa-1) and selectivity (9.5 H2/CO, 9.8 H2/CH4, and 9.8 H2/CO2) at 573 K. Moreover, we investigated hydrothermal stabilities of the ZIF-7 membrane to reveal its plausibility of application for Water-Gas-Shift reaction. To the best of our knowledge, this is the first detailed study on hydrothermal effect to ZIF-7 membrane. |
