DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 최민기 | - |
dc.contributor.author | Park, Jongbeom | - |
dc.contributor.author | 박종범 | - |
dc.date.accessioned | 2024-07-25T19:30:16Z | - |
dc.date.available | 2024-07-25T19:30:16Z | - |
dc.date.issued | 2022 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=1044796&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/320396 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2022.8,[33 p. :] | - |
dc.description.abstract | Selective ethane adsorption from a mixture of ethane ($C_2H_6$)/ethylene ($C_2H_4$) has emerged as an energy-efficient process for obtaining high-purity ethylene. Some microporous organometallic and organic adsorbents have recently been reported to exhibit unique preferential $C_2H_6$ adsorption behaviors. Conversely, conventional adsorbents such as zeolites are known to preferentially adsorb $C_2H_4$ over $C_2H_6$ (olefin-philic) due to high surface polarity and acidity. Here, we systematically investigated the effects of chemical compositions, silanol defects, and pore topologies (BEA, CHA, and MFI) to develop olefin-phobic zeolites. The results indicated that even the minor presence of Si-O-(Na$^{+}$)-Al (weak Lewis acid) and Si-OH (weak acidic Brønsted acid) groups can undesirably increase the affinity for $C_2H_4$. Consequently, only the defect-free pure-silica zeolites synthesized in fluoride media exhibited high $C_2H_6$/$C_2H_4$ selectivity (1.98–2.25), which were superior to those of Al-containing zeolites (0.26–1.17) and pure-silica zeolites with silanol defects (1.36–1.51). In particular, BEA zeolite exhibited the highest $C_2H_6$/$C_2H_4$ selectivity (2.25), large ethane uptake (2.27 mmol g$^{-1}$) and efficient regeneration at 298 K. It enabled the separation of high-purity $C_2H_4$ (>99.95%) from a mixture of $C_2H_6$/$C_2H_4$ (1/1 v/v) in large productivity (22.98 LSTP L$^{-1}$), which is very promising compared to various state-of-the-art adsorbents. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | 제올라이트 흡착제▼a에테인/에틸렌 분리▼a에테인 선택적 흡착▼a고순도 에틸렌 생산성 | - |
dc.subject | Zeolite adsorbent▼aEthane/ethylene separation▼aEthane selective adsorption▼aHigh-purity ethylene productivity | - |
dc.title | Design of olefin-phobic zeolite adsorbents for efficient ethane/ethylene separation | - |
dc.title.alternative | 효율적인 에테인/에틸렌 분리를 위한 올레핀 배타적인 제올라이트 흡착제 설계에 관한 연구 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :생명화학공학과, | - |
dc.contributor.alternativeauthor | Choi, Minkee | - |
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