SRK状態方程式による気液平衡推算の改良法

概要

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The interaction parameter K_<ij> in the Soave-Redlich-Kwong equation so far has been treated as constant. Our examination of the K_<ij> parameter in the equation shows that the K_<ij> parameter depends on concentration. Using the K_<ij> determined by the conventional least-square method, the solution of the equation can not be obtained sometime. Therefore, calculations of vapor-liquid equilibria by he SRK equation are made impossible. On the other hand, using the proposed interaction parameter K_<ij> which depends on concentration, the solution can be obtained with a good result of prediction. The behavior of K_<ij> may be classified into these cases for the concentration of components with low boiling point. 1. K_<ij> increases from negative values to positive ones with increasing concentration. 2. K_<ij> increases from positive values to negative ones with increasing concentration. 3. K_<ij> approaches to zero from both negative values or positive ones with increasing concentration.
東海大学の論文