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삼성분계 등온기액평형치로부터 등압기액평형치 유도에 관한 연구

A Study on the Derivation of Isobaric Vapor-liquid Equilibrium Data from Isothermal Vapor-liquid Equilibrium Data for Ternary Systems

임진남 박성신

Rhim JN Park SS

HWAHAK KONGHAK, June 1975, 13(3), 147-156(10), NONE

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Abstract

이성분계 acetone-methanol, acetone-ethanol, acetone-benzene, ethanol-benzene, methanol-benzene등에 대하여 15 ℃, 25 ℃, 35 ℃, 45 ℃, 55 ℃에서 전압을 측정하였다. 측정한 전압으로부터 objective function∑（P_exp-P_cal）_i을 nonlinear regression method에 의해 Wilson식과 Redlich-Kister식에서 처리하여 평형증기의 조성을 구하였으며, 전압측정치를 온도에 대하여 cross plotting하므로써 정압기액평형치를 추산했다.
one parameter Wilson식을 이용하여 acetone-benzene-ethanol, acetone-methanol-benzene 삼성분계의 정압기액평형치를 추산했으며 실험치와 비교 검토하므로써 추산방법의 타당성을 확인하였다.

Isothermal vapor-liquid equilibria were measured for the binary systems, acetone-methanol, acetone-ethanol, acetone-benzene, ethanol-benzene, and methanol-benzene, at 15 ℃, 25 ℃ 35 ℃, 45 ℃, and 55 ℃ using the total pressure method. Vapor compositions were obtained by the Wilson equation and the Redlich-Kister equation, minimizing the objective function ∑（P_exp-P_cal）_i by a nonlinear regression method. For these systems, isobaric vapor-liquid equilibria were estimated by cross plotting isothermal vapor-liquid equilibrium data which were obtained from the total pressure method. Also isobaric vapor-liquid eguilibria in the ternary systems of acetone-benzene-ethanol, acetone-methanol-benzene were estimated from the results for the corresponding binary systems. The predicted isobaric data were found to be in a good agreement with the experimental data taken at 760 mmHg.

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