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초임계유체와 염을 이용한 에탄올농축에 관한 연구(I)-CO2-C2H5OH계와 CO2-H2O계의 고압기액평형-
A Study on concentration of Ethanol by su;ercritical Fluids & Salts(I)-High Pressure Vapor-Liquid Equilibria for CO2-C2H5OH and CO2-H2O systems-
HWAHAK KONGHAK, February 1991, 29(1), 111-117(7), NONE
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Abstract
기상과 액상 모두들 계속해서 순환시키는 상평형실험장치(circulation type)를 이용하여, CO2-C2H5OH계에 대한 고압기액상평형실험을 313.2K, 323.2K, 333.2K에서 압력(약 5MPa-혼합물의 임계압력부근)을 변화시키면서 수행하였다. 각각의 온도에 대한 혼합물의 임계압력은 8.1MPa, 9.3MPa, 10.6MPa 정도로서 온도가 증가할수록 혼합물의 임계압력이 증가하는 것을 알 수 있었다. 또 CO2-C2H5OH계 및 CO2-H2O계의 고압상평형자료를 Adachi와 Sugie의 홉합법칙을 사용한 Patel-Teja의 3차상태방정식에 적용하여 상관시켜 본 결과 만족할만한 상관결과를 얻었다.
High pressure vapor-liquid equilibria for CO2-C2H5OH system were measured at three tem-peratures of 313.2K, 323.2K and 333.2K using a circulation type of apparatus in which both vapor and liquid phase were continuously recirculated over a pressure range from ca. 5MPa up to near mixture critical point. The critical pressures of the mixtures were about 8.1MPa, 9.3MPa and 10.6MPa at the three temper-atures, respectively. This result shows that the temperature increases with the critical pressure of the mixture. The high pressure vapor-liquid equilibrium data for CO2-C2H5OH and CO2-H2O systems were satisfactorily correlated by applying the Patel-Teja equation of state with the Adachi-Sugie mixing rule.
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Patel NC, Teja AS, Chem. Sci. Eng., 37, 463 (1982)
Takenouchi S, Kennedy GC, Am. J. Sci., 262, 1055 (1964)
Takishima S, Saiki K, Arai K, Saito S, J. Chem. Eng. Jpn., 19, 48 (1986)
Trebble MA, Bishnoi PR, Fluid Phase Equilib., 29, 465 (1986)
Wiebe R, Chem. Rev., 29, 475 (1941)
Wiebe R, Gaddy VL, J. Am. Chem. Soc., 61, 315 (1939)
Wiebe R, Gaddy VL, J. Am. Chem. Soc., 62, 815 (1940)
Wiebe R, Gaddy VL, J. Am. Chem. Soc., 63, 475 (1941)
