3次 狀態方程式에 적용할 수 있는 UNIQUAC에 의한 混合法則

Abstract

過剩 Gibbs에너지의 混合法則을 Soave-Redlich-Kwong 狀態方程式에 도입하여 氣-液평형을 재현하도록 UNIQUAC의 相互作用파라미터를 결정하였다. 파라핀系에 대한 파라미터는 무시할 정도로 작고, 극성물질을 포함한 다른系에서는 混合物의 퓨가시티係數를 변화시킬 수 있는 큰 값이다. 그리고 에타놀-물系를 제외하고는 상호작용파라미터는 온도에 거의 의존하지 않는다.

실제로 이 혼합법칙으로 파라핀 2成分系, 프로판-벤젠, 알콜-물, 아세톤-물 그리고 아세톤-메타놀系의 氣-液평형을 저압에서 고압영역까지 성공적으로 再現할 수 있었다.

The mixing rule with excess Gibbs energy was introduced into SRK equation of state and the interaction parameters of UNIQUAC were determined so as to reproduce vapor-liquid equilibrium data. The parameters of paraffin systems are small enough to be neglected and the parameters of other systems including polar components are large enough to change the fugacity coefficients of these mixtures. In addition, the interaction parameters hardly depend on temperature except for ethanol-water systems.

In fact, vapor-liquid equilibria for binary paraffin, propane-benzene, alcohol-water, acetone-water, and acetone-methanol systems could be successfully reproduced in the range of low to high pressure by the mixing rule with UNIQUAC.

The mixing rule with excess Gibbs energy was introduced into SRK equation of state and the interaction parameters of UNIQUAC were determined so as to reproduce vapor-liquid equilibrium data. The parameters of paraffin systems are small enough to be neglected and the parameters of other systems including polar components are large enough to change the fugacity coefficients of these mixtures. In addition, the interaction parameters hardly depend on temperature except for ethanol-water systems.

In fact, vapor-liquid equilibria for binary paraffin, propane-benzene, alcohol-water, acetone-water, and acetone-methanol systems could be successfully reproduced in the range of low to high pressure by the mixing rule with UNIQUAC.