HWAHAK KONGHAK, Vol.25, No.1, 45-53, February, 1987
UNIQUAC모델에 의한 추출증류에서의 용제선택도 예측
Prediction of Solvent Selectivity in Extractive Distillation using the UNIQUAC Model
초록
1기압하에서 2 성분계의 n-hexane-phenol, benzene-phenol에 대하여 액상의 조성에 따라 비점과 기상의 조성을 각각 측정하였다. 이들 2 성분 기-액평형 데이타는 열역학적 건전성 판정에 의하여 건전함을 확인하였고, 이를 UNIQUAC모델과 상호 연관시켜 모델내의 파라미터를 추산하였고, 이 2성분 파라미터는 추출증류에 의한 기-액평형 및 용제의 선택도를 예측하는데 확장되었다.
공비혼합물을 형성하는 n-hexane-benzene계에 용제로서 phenol의 농도를 변화시켜 가며 추출증류에 의한 3 성분계의 비점과 기상의 조성을 측정하였고, 실험치는 2 성분 파라미터에 의하여 계산된 값과 비교하였다.
또한 n-hexane-benzene에 대하여 용제를 첨가하지 않았을 때의 상대휘발도와 용제를 첨가했을때의 상대휘발도에 대한 실험치와 계산치를 비교하였다.
공비혼합물을 형성하는 n-hexane-benzene계에 용제로서 phenol의 농도를 변화시켜 가며 추출증류에 의한 3 성분계의 비점과 기상의 조성을 측정하였고, 실험치는 2 성분 파라미터에 의하여 계산된 값과 비교하였다.
또한 n-hexane-benzene에 대하여 용제를 첨가하지 않았을 때의 상대휘발도와 용제를 첨가했을때의 상대휘발도에 대한 실험치와 계산치를 비교하였다.
The boiling points and vapor phase compositions of two binary n-hexane-phenol and benzene-phenol systems were measured according to liquid compositions at 1 atm.
The vapor-liquid equilibrium data of those binary systems were known to be consistent by the thermodynamic consistency test, and the parameters in the model were estimated by correlating the binary vapor-liquid data with the UNIQUAC model, and those binary interaction parameters were extended to predict the ternary vapor-liquid equilibria and solvent selectivity by extractive distillation.
The boiling points and compositions of the vapor phase for ternary systems were measured according to varying the concentration of phenol used as solvent in a binary n-hexane-benzene system forming the azeotropic mixture at 1 atm, and the experimental data were compared with values predicted by the binary interaction parameters.
And the experimental relative volatilities for the n-hexane-benzene system with solvent and without solvent were also compared with calculated values.
The vapor-liquid equilibrium data of those binary systems were known to be consistent by the thermodynamic consistency test, and the parameters in the model were estimated by correlating the binary vapor-liquid data with the UNIQUAC model, and those binary interaction parameters were extended to predict the ternary vapor-liquid equilibria and solvent selectivity by extractive distillation.
The boiling points and compositions of the vapor phase for ternary systems were measured according to varying the concentration of phenol used as solvent in a binary n-hexane-benzene system forming the azeotropic mixture at 1 atm, and the experimental data were compared with values predicted by the binary interaction parameters.
And the experimental relative volatilities for the n-hexane-benzene system with solvent and without solvent were also compared with calculated values.