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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제117회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Diamine-functionalized metal-organic framework: exceptionally high CO2 capacities from ambient air and flue gas, ultrafast CO2 uptake rate, and adsorption mechanism

2016년 3월 24일 09시 16분 33초
KCS2.O-3 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 10시 : 46분
한국다우케미칼 우수논문상 수상자 구두발표
저자 및
이우람, 황상연, 유대원, 임광수, 한상수1, 문도현2, 최정규3, 홍창섭*
고려대학교 화학과, Korea
1한국과학기술연구원(KIST) 계산과학연구센터, Korea
2포항가속기연구소 빔라인운영부 생명화학소재팀, Korea
3고려대학교 화공생명공학과, Korea

A framework en-Mg2(dobpdc) (1-en; en = ethylenediamine) functionalized with the primary amine en was prepared via postmodification.(Figure 1) From synchrotron PXRD data, it is revealed that the cell parameters change upon grafting of en and CO2 uptake. The adsorbed CO2 amount of 1-en is 4.57 mmol g-1 (16.7 wt%) at 25 ℃ and 1 bar and decreases to 3.00 mmol g-1 (11.7 wt%) at 150 ℃. Noticeably, 1-en shows a significant CO2 uptake (3.62 mmol g-1, 13.7 wt%) at 0.15 bar, which is comparable to the CO2 partial pressure of a postcombustion flue gas.(Figure 2) The CO2 capacity of 1-en at 0.39 mbar, close to atmospheric CO2 concentration, is 2.83 mmol g-1 (11.1 wt%), which marks the highest amount among MOFs. The isosteric heat of adsorption (-Qst) of 1-en in CO2 capture corresponds to 49–51 kJ mol-1, which is supported by DFT calculations (-52.8 kJ mol-1). Adsorption–desorption cyclings of CO2 at the real dilute concentrations of air and flue gas are established with almost retaining CO2 capacities, which could provide superior potential for practical application in CO2 capture.(Figure 3) The adsorption rate of CO2 in 1-en exceeds that in some other tested porous materials. The recyclability in CO2 uptake for 1-en is maintained even after exposure to humidity.