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HWAHAK KONGHAK,
Vol.29, No.6, 654-662, 1991
Vol.29, No.6, 654-662, 1991
연속열역학을 이용한 다성분 혼합물의 기-액 상평형 계산
Calculation of Vapor-Liquid Equilibria of Multicomponent Mixtures Using Continuous Thermodynamics
다성분 혼합물의 기-액 상평형을 계산하기 위해 연속열역학을 이용하였으며, 이를 n-alkane, aromatic oil 및 초임계 탄산가스로 추출된 lemon oil 혼합물에 각각 적용시켜 계산결과를 비교 검토하였다. 복합혼합물을 정의하기 위하여 정규분포함수를 사용하였고 변수로 비점을 채택하였으며 전체성분을 불연속성분과 연속성분의 합인 semi-continuous 혼합물로 처리하였다. 여러 가지 3차 상태방정식 중에서 Soave-Redlich-Kwong(SRK)식과 Peng-Robinson(PR) 식을 이용하였으며, N-alkane 및 aromatic oil의 경우 연속성분을 1개의 군으로 처리한 반면에 초임계 탄산가스로 추출한 lemon oil 혼합물의 연속성분은 2개의 군으로 정의하여 기-액 상평형을 계산하였다.
Continuous thermodynamics is adopted in order to calculate the vapor-liquid equilibria of multi-component mixtures and the results are analyzed by applying to n-alkanes, aromatic oils and lemon oil mixtures extracted with supercritical carbon dioxide. In this work the mixtures are treated as semi-continuous whose distribution variable for the continuous fraction is normal boiling temperature. The vapor-liquid equilibrium calculations are performed using the Soave-Redlich-Kwong(SRK) and the Peng-Robinson(PR) equations of states by defining one continuous fraction for n-alkanes and aromatic oils and two continuous fractions for lemon oil mixtures.
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