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HWAHAK KONGHAK,
Vol.35, No.1, 46-54, 1997
Vol.35, No.1, 46-54, 1997
Benzene, Toluene, p-Xylene+Alcohol(C1-C4) 혼합계의 기액평형과 과잉 몰부피 측정
Measurement of the Vapor-liquid Equilibria and the Excess Molar Volumes of Benzene, Toluene and p-Xylene Mixtures with Alcohols(C1-C4)
45℃ 등온에서 benzene+alcohol(C1-C4) 혼합계와 60℃ 등온에서 toluene, p-xylene+alcohol(C1-C4) 혼합계의 기액평형조성을 정적 측정방법의 일환인 head space gas chromatography(H.S.G.C)를 이용하여 측정하였다. 측정한 대부분의 이성분계 혼합물에서 최소공비점이 발견되었고, 실험을 통해 얻은 기액평형 데이터는 각각 gE 모델식으로 그 상관관계를 알아보았다. 이와 함께 동일 혼합계의 과잉 몰부피를 25℃ 등온하에서 digital vibrating tube densitometer를 이용하여 측정하였으며, 실험으로 얻은 데이터는 5개의 매개변수를 사용한 Redlich-Kister다항식을 이용하여 합치시켜 보았다.
Isothermal vapor-liquid equilibria have been studied for binary mixtures of benzene+alcohol(C1-C4) at 45℃ and toluene, p-xylene+alcohol(C1-C4) at 60℃ by using head space gas chromatography(H.S.G.C.), one of the static measuring methods. Most of the measured binary systems show minimum boiling azeotropes. These experimental VLE data were correlated with conventional gE models. The excess molar volumes have been measured also for the same binary mixtures at 25℃ by using digital vibrating tube densitometer. The experimental data were fitted with 5-parameter Redlich-Kister equation.
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