화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.12, No.6, 682-687, October, 2001
Export Citation
이성분 CO2/N,N-DMFA와 CO2/N,N-DEFA계의 고압 상거동
High Pressure Phase Behavior of Binary CO2/N,N-DMFA and CO2/N,N-DEFA Systems
김낙현, 변헌수1, 곽철†, 박인수, 황영기
  • 경남대학교 정밀화학공학부, 마산 631-701
  • 1여수대학교 화학공학과, 여수 550-749
Nak Hyun Kim, Hun Soo Byun1, Chul Kwak†, In Soo Park, and Young Gi Hwang
  • School of Fine Chemistry and Chemical Engineering, Kyungnam University, Masan 631-701, Korea
  • 1Department of Chemical Engineering, Yosu National University, Yosu 550-749, Korea
E-mail:
초록
초임계 이산화탄소를 포함한 N,N-Dimethylformamide (N,N-DMFA)와 N,N-Diethylformamide (N,N-DEFA)에 대한 이성분계 상평형 데이터를 얻기 위해 실험을 수행하였다. CO2-N,N-DMFA 및 CO2-N,N-DEFA의 이성분계 압력-조성관계를 온도 318.2 K, 338.2 K, 358.2 K, 378.2 K 그리고 398.2 K와 압력 2.90 ~ 20.72 MPa 범위에서 얻었다. 일정 압력에서 N,N-DMFA와 N,N-DEFA에 대한 이산화탄소의 용해도는 온도가 증가함에 따라 감소함을 알 수 있으며, 또한 혼합물 임계점 압력은 온도가 증가함에 따라 증가하였다. 순수성분 이산화탄소와 N,N-DMFA 및 N,N-DEFA에 대해 증기압을 서로 연결하는 혼합물 임계곡선을 계산하였다. 본 연구에서 실험한 자료를 Peng-Robinson 상태방정식으로 모델링하였으며, Peng-Robinson 상태방정식에서 온도에 독립적인 두개의 파라미터를 이용하여 계산한 계산치와 실험치를 비교한 결과 좋은 일치를 보였다.
The high pressure binary phase equilibria data was obtained for N,N-Dimethylformamide (N,N-DMFA) and N,N-Diethylformamide (N,N-DEFA) with supercritical carbon dioxide. Pressure-composition isotherms were obtained for CO2-N,N-DMFA and CO2-N,N-DEFA systems at the temperatures of 318.2K, 338.2K, 358.2K, 378.2K, 398.2K and pressures of 2.90 to 20.72 MPa. The solubility of carbon dioxide in N,N-DMFA and N,N-DEFA decreased as the temperature increased at a constant pressure. The pressure at critical points of the mixture increased as the temperature increased. At a nominal pressure, the curve of critical points for the mixture exhibited a maximum at temperatures between the critical temperatures of carbon dioxide-N,N-DMFA and carbon dioxide-N,N-DEFA systems. The experimental results obtained in this study were modeled using the peng-Robinson equation of state. A good fit of the data was obtained with the Peng-Robinson equation using two adjustable mixture parameters for the carbon dioxide-N,N-DMFA and the carbon dioxide-N,N-DEFA systems.
Keywords:carbon dioxide;N,N-dimethylformamide;N,N-dietylformamide;phase behavior
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