Glycerol-물 계에 대한 등압 기액평형의 측정과 상관관계

노선균; 강춘형

Journal of the Korean Industrial and Engineering Chemistry, Vol.8, No.6, 893-900, December, 1997

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Glycerol-물 계에 대한 등압 기액평형의 측정과 상관관계

Measurements and Correlations of Isobaric Vapor-Liquid Equilibrium for Glycerol-Water Systems

노선균, 강춘형

초록

기상 재순환 평형조를 사용하여 대기압 이하의 여러 압력에서 glycerol-물 계에 대한 기-액 평형을 측정하였다. 이 연구에서 고려한 이성분계는 비등점 차이가 매우 큰 성분들로 구성되어 있다. 비등점의 차이가 큰 혼합물의 경우, 순수한 성분으로부터 유추할 수 있는 물리적 특성은 실제 혼합물의 특성과는 매우 다르므로 정확한 혼합물의 특성을 이해하지 않으면 안된다. 특히 비등점이 높은 성분의 액상농도가 증가하면 혼합물의 비등점이 급격하게 높아지는 현상이 일어난다. 그러므로 실제공정의 효율적 운전을 위해서는 비이상성 혼합물의 상평형에 관한 정보가 필수적이다. 측정한 기-액 평형 데이터는 UNIQUAC 모델을 이용하여 정확하게 상관관계 시킬 수 있었다. 또한, 데이터의 건전성을 확인하기 위하여 열역학적 건전성 테스트를 수행하였다.

In this study, vapor-liquid equilibria of a binary system, which consists of glycerol and water, are measured using a vaporrecirculating modified Othmer still at various subatmospheric pressures. The constituent components of the binary system considered in this study exhibit a large difference in the boiling temperatures. Since it is generally observed that the properties of a mixture greatly differ from those of the pure components, the phase equilibrium characteristics of a mixture can not be predicted from the properties of the pure components. Furthermore, an abrupt increase in the boiling temperature occurs as the concentration of the higher boiling component exceeds a certain value. Therefore, it is essential to acquire realistic phase equilibrium data of the mixture for industrial applications. Using the UNIQUAC model, the experimental vapor-liquid equilibrium data are correlated with good accuracy. The thermodynamic consistency test is also performed to ensure soundness of the data.

[References]

Monfort JP, J. Chem. Eng. Data, 28, 24 (1983)
Resa JM, Quintana T, Cepeda E, J. Chem. Eng. Data, 39(1), 98 (1994)
Hala E, Pick J, Fried V, Vilim O, "Vapor-Liquid Equilibrium," 2nd ed., Pergamon Press (1967)
Prausnitz JM, Lichtenthaler RN, Azevedo EG, "Molecular Thermodynamics of Fluid-Phase Equilibria," Prentice-Hall, Englewood Cliffs, N.J. (1986)
Gmehling J, Onken U, Rarey-Nies JR, "Vapor-Liquid Equilibrium Data Collection Vol. 1, Part 1b," DECHEMA (1988)
Chen DHT, Thompson AR, J. Chem. Eng. Data, 15, 471 (1970)
Redlich O, Kister AT, Ind. Eng. Chem., 40, 345 (1948)
Smith JM, Van Ness HC, "Introduction to Chemical Engineering Thermodynamics," McGraw-Hill, N.Y. (1988)
Prausnitz JM, Anderson TF, Grens EA, Eckert CA, Hsieh R, O'Connell JP, "Computer Calculation for Multicomponent Vapor-Liquid and Liquid-Liquid Equilibria," Pretice-Hall, Englewood Cliffs, N.J. (1980)
McCann DW, Danner RP, Ind. Eng. Chem. Process Des. Dev., 23, 529 (1984)
Renon H, Prausnitz JM, AIChE J., 14, 135 (1968)
Hayden JG, O'Connell JP, Ind. Eng. Chem. Process Des. Dev., 14, 209 (1975)
Abrams DS, Prausnitz JM, AIChE J., 21, 116 (1975)
Kemeny S, Manczinger J, Chem. Eng. Sci., 33, 71 (1978)
Chen CC, Britt HI, Boston JF, Evans LB, AIChE J., 28, 588 (1982)
Hoyt LF, Ind. Eng. Chem., 26, 329 (1934)
Cepeda E, Gonzalez C, Resa JM, J. Chem. Eng. Data, 34, 270 (1989)
Nelder JA, Mead R, Comput. J., 7, 308 (1964)
VanNess HC, Byer SM, Gibbs RE, AIChE J., 19, 238 (1973)

[Referenced By]

[1] Monfort JP, J. Chem. Eng. Data, 28, 24 (1983)

[2] Resa JM, Quintana T, Cepeda E, J. Chem. Eng. Data, 39(1), 98 (1994)

[3] Hala E, Pick J, Fried V, Vilim O, "Vapor-Liquid Equilibrium," 2nd ed., Pergamon Press (1967)

[4] Prausnitz JM, Lichtenthaler RN, Azevedo EG, "Molecular Thermodynamics of Fluid-Phase Equilibria," Prentice-Hall, Englewood Cliffs, N.J. (1986)

[5] Gmehling J, Onken U, Rarey-Nies JR, "Vapor-Liquid Equilibrium Data Collection Vol. 1, Part 1b," DECHEMA (1988)

[6] Chen DHT, Thompson AR, J. Chem. Eng. Data, 15, 471 (1970)

[7] Redlich O, Kister AT, Ind. Eng. Chem., 40, 345 (1948)

[8] Smith JM, Van Ness HC, "Introduction to Chemical Engineering Thermodynamics," McGraw-Hill, N.Y. (1988)

[9] Prausnitz JM, Anderson TF, Grens EA, Eckert CA, Hsieh R, O'Connell JP, "Computer Calculation for Multicomponent Vapor-Liquid and Liquid-Liquid Equilibria," Pretice-Hall, Englewood Cliffs, N.J. (1980)

[10] McCann DW, Danner RP, Ind. Eng. Chem. Process Des. Dev., 23, 529 (1984)

[11] Renon H, Prausnitz JM, AIChE J., 14, 135 (1968)

[12] Hayden JG, O'Connell JP, Ind. Eng. Chem. Process Des. Dev., 14, 209 (1975)

[13] Abrams DS, Prausnitz JM, AIChE J., 21, 116 (1975)

[14] Kemeny S, Manczinger J, Chem. Eng. Sci., 33, 71 (1978)

[15] Chen CC, Britt HI, Boston JF, Evans LB, AIChE J., 28, 588 (1982)

[16] Hoyt LF, Ind. Eng. Chem., 26, 329 (1934)

[17] Cepeda E, Gonzalez C, Resa JM, J. Chem. Eng. Data, 34, 270 (1989)

[18] Nelder JA, Mead R, Comput. J., 7, 308 (1964)

[19] VanNess HC, Byer SM, Gibbs RE, AIChE J., 19, 238 (1973)