| 초록 |
As the interests of hydrogen(H2) purification from industry gas is growing, the H2/CO2 separation has been drawn attention more than before. Among various membrane materials of H2/CO2 separation, porous graphene oxide (GO) membrane is the most well-known for having high flux and selectivity because of their thin thickness and pore. However, porous GO membrane has the disadvantage of making it in large-scale. Herein, we demonstrate mass production method for manufacturing the porous GO membrane which has high selectivity and H2 permeance. Membranes were prepared on porous polymer membrane by a bar coater. To control the d-spacing and the pore size, GO membrane was hot-pressed (150 ℃, 13.33 kg/cm2) for 5 hours. The hot-pressed GO membrane had low d-spacing value (3.8 and 4.8 Å) by hot-press method, but H2 permeance and H2/CO2 selectivity had increased due to pore was formed on GO layer. The hot-pressed GO membrane showed excellent separation performance with H2/CO2 selectivity of 12 ± 1.31 and H2 permeance of 1.84 ± 0.5 x 10-6 mol m-2 s-1 Pa-1. |
