| 학회 |
한국공업화학회 |
| 학술대회 |
2021년 가을 (11/03 ~ 11/05, 대구 엑스코(EXCO)) |
| 권호 |
25권 2호 |
| 발표분야 |
포스터-환경·에너지 |
| 제목 |
Microdefect Minimization for a Polycrystalline Zeolite Membrane: Remarkable Performance for Wet CO2/CH4 Separation |
| 초록 |
A hydrophobic deca-dodecasil 3 rhombohedral (DDR) zeolite film was prepared via hetero-epitaxial growth from Chabazite (CHA) zeolite. The DDR zeolite has a pore size (0.36 × 0.44 nm2) ideal for molecular-sieve-based CO2 (0.33 nm) separation from CH4 (0.38 nm), which is critical for upgrading biogas. A proper choice of calcination conditions was the key factor controlling the defect formation and determining the final membrane performance. Low-temperature calcination in O3 eliminated defect formation and, thus, achieved a very high performance for dry CO2 perm-selectivity over CH4 (CO2/CH4 separation factor (SF) of ca. 523 at ca. 50 °C). The defect structures were quantitatively analyzed by combining fluorescence confocal optical microscopy image with gas-permeation modeling. This clearly revealed that fully opening the all-silica hydrophobic DDR zeolite micropores helped to achieve high CO2/CH4 separation performance under wet conditions. |
| 저자 |
이민성, 정양환, 최정규
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| 소속 |
고려대 |
| 키워드 |
Zeolite membrane; CO2/CH4 separation
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| E-Mail |
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