3次状態方程式による液相密度計算における精度向上の試み [in Japanese] Improvement of the Calculation Performance for Liquid-Phase Densities by Cubic Equation of State [in Japanese]
Access this Article
Search this Article
液相密度計算における精度を向上させた3次状態方程式を提案した.斥力項には剛体球流体について開発されたScott-I型を用い, 引力項にはFullerの式を採用した.簡易型混合則を用いて, いくつかの代表的な2成分系について気液平衡および気液両相の飽和密度の相関を試みた.その結果, 気液平衡と同様に気液飽和密度も満足に計算できることが示された.
A cubic equation of state is proposed to improve the calculation performance for liquid-phase densities. For the repulsive part, the Scott-I expression developed for hard sphere fluid is adopted and the attractive part proposed by Fuller is combined with the repulsive part. For typical binary systems, both vapor-liquid equilibria and saturated densities of vapor and liquid phases were calculated by the equation of state with the conventional mixing rule. Good agreement is found between calculated and experimental saturated liquid densities, as well as vapor-liquid equilibria, though a discrepancy is found in the calculation of liquid densities by SRK equation of state widely used.
- Chemical engineering
Chemical engineering 24(5), 806-809, 1998-09-10
The Society of Chemical Engineers, Japan