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포름산-물-염화마그네슘계의 등압 기액 상평형 연구
A Study on the Isobaric Vapor-Liquid Equilibria of Formic Acid-Water-Magnesium Chloride System
HWAHAK KONGHAK, April 1997, 35(2), 313-318(6), NONE
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Abstract
포름산-물계의 기액 상평형에 염화마그네슘이 미치는 영향을 염농도인자 f(wt% of H2O)/(wt% of MgCl2)의 변화에 따라 상압하(760mmHg)에서 측정하였다. 염이 이온 형태를 유지하며 물에만 용해된다는 유사 이성분계를 가정하고 기상에서의 포름산의 이량체 생성반응이 활동도계수에 미치는 영향을 고려하여 기액 상평형 자료를 해석하였다. 염농도 f 인자를 3.2, 2.8, 2.0 으로 변화시키며 이에 따른 유사 이성분계의 활동도계수와 상대휘발도의 변화를 연구하였다.
Isobaric vapor-liquid equilibria for formic acid-water-magnesium chloride at different charge rate of magnesium chloride using f(wt% of H2O)/(wt% of MgCl2) factor has been measured at an atmospheric pressure(760mmHg). In the thermodynamic analysis of the vapor-liquid equilibria, the system has been treated as a pseudo-binary system assuming that the salt was dissolved only in the water in ionic form. The dimerization effect of formic acid in vapor phase has been taken into account to estimate the activity coefficients of pseudo-binary components. Both change of activity coefficients and relative volatilities have been studied with respect to f values of 3.2, 2.8 and 2.0 in this pseudo-binary system.
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References
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Sako T, Hakuta T, Yoshitome H, J. Chem. Eng. Jpn., 17(4), 381 (1984)
Plewes AC, Pei DC, Code RK, Can. J. Chem. Eng., June, 121 (1959)
Ito T, Yoshida F, J. Chem. Eng. Data, 8, 315 (1963)
Chueh CF, AIChE Symp. Ser., 70(140), 110 (1974)
Guyer A, Guyer A, Johnsen BK, Helvetica Acta, 38(108), 946 (1955)
Perry RH, Chilton CH, "Chemical Engineer's Handbook," 5th ed., McGraw-Hill (1973)
Lide DR, "CRC Handbook of Chemistry and Physics," 72th ed., CRC Press (1991)
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Johnson AI, Furter WF, Can. J. Chem. Eng., 37, 78 (1960)
