Phase equilibria in very dilute mixtures of water and chlorinated hydrocarbons. Part I—experimental results

Barr, R.S.; Newsham, D.M.T.

doi:10.1016/0378-3812(87)80012-2

Cited by 25 publications

(14 citation statements)

References 4 publications

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“…While for compounds having P 1 s (293.15 K) of the order of 10 kPa directly measured values known to better than 1% are typically available, for compounds whose P 1 s (293.15 K) are about 1 kPa or lower, the values had to be obtained by extrapolation, and thus they are much more inaccurate. As clearly seen in Figure 4, the accord of our measurements with a great majority of recent literature data is within Wright et al (1992); 2, Barr and Newsham (1987); 0, Bao et al (1993); O, Cooling et al (1992); 4, Li et al (1993); ], Hansen et al (1993). For 1,1,2-trichloroethane, data encountered essentially split into two values, 2.2 kPa and 2.4 kPa; preference was given here to the lower value, matching well results of our previous ebulliometric measurements at higher temperatures (Dohnal and Fenclová , 1985).…”

Section: Resultssupporting

confidence: 90%

Determination of Air−Water Partitioning of Volatile Halogenated Hydrocarbons by the Inert Gas Stripping Method

Hovorka

Dohnal

1997

J. Chem. Eng. Data

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Air-water partitioning for 21 volatile chlorinated or brominated alkanes, alkenes, and aromatics was measured at 20°C by the inert gas stripping method. Results of the measurements are presented in the form of Henry's law constants (H 12 ), air-water partition coefficients (K aw ), and limiting activity coefficients (γ 1 ∞ ), accurate γ 1 ∞ values being obtained only if accurate pure solute vapor pressure data are available.The halocarbons studied in this work are hydrophobic and exhibit enhanced volatilities from their dilute aqueous solutions representing approximately ranges of γ 1 ∞ from 230 to 70 000 and H 12 from 2 to 70MPa. Correct performance of the stripping method for such systems requires special precautions. As confirmed by test measurements on benzene, chlorobenzene, 1,1,1-trichloroethane, and 1,1,2-trichloroethane, the complete equilibration in the stripping cell can be achieved under vigorous mixing of the cell, low stripping gas flow rates (approximately 10 cm 3 ‚min -1 ), and low relative elution rates (0.01 min -1 ). Choosing for each system a cell of a suitable volume made it possible to comply with the latter requirement. The results compare well with recent literature values obtained by various methods for some of the halocarbons. For two selected halocarbons (bromobenzene and 1,1-dichloroethane), detailed measurements of the temperature dependence of air-water partitioning were carried out in the range of (10-50)°C. These measurements corresponding to the range of H 12 from 5 to 72 MPa provide additional support for the validity of the method.

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Section: Resultssupporting

confidence: 90%

Determination of Air−Water Partitioning of Volatile Halogenated Hydrocarbons by the Inert Gas Stripping Method

Hovorka

Dohnal

1997

J. Chem. Eng. Data

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“…b References: (1) Li, 1992a; (2) Li et al, 1993a; (3) Barr and Newsham, 1987; (4) Dallas, 1993;(5) Mash and Pemberton, 1980;(6) Mel'der and Ebber, 1978; (7) Abraham et al, 1974;(8) Kohn, 1988;(9) Gillespie et al, 1985; (10) Wright et al, 1987;(11) Sorenson and Arit, 1979;(12) Macedo and Rasmusen, 1987;(13) Yaws et al, 1990a;(14) Yaws et al, 1990b;(15) Shaw, 1989. c (11) …”

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confidence: 99%

Compilation and Correlation of Limiting Activity Coefficients of Nonelectrolytes in Water

Sherman¹,

Trampe²,

Bush³

et al. 1996

Ind. Eng. Chem. Res.

101

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The phase equilibria of dilute aqueous solutions are treated separately from those of dilute organic systems due to water's unique structure and hydrogen-bonding characteristics. As a result, traditional predictive methods (UNIFAC, ASOG, etc.) tend to be only moderately successful. In addition to inverse solubility measurements, we describe new direct and indirect techniques for precisely measuring these values which are more accurate. A database is compiled from data measured by using these techniques. The data were evaluated and suspect points removed. The data were correlated linearly with the solute solvatochromic R, , and π*, solute and solvent molar volume, solute vapor pressure, and the solute gas-liquid partition coefficient between hexadecane and an inert gas phase, log L 16 . The correlation fits the data to within an average absolute deviation of 0.294 ln units. The correlation provides a direct and relatively accurate method for estimating Henry's constants and thus limiting activity coefficients of nonelectrolytes in water.

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“…Equation 9 was used to compute the gas holdup. The infinite-dilution activity coefficient for chloroform was taken from Barr and Newsham (1987) who measured it experimentally. The one for bromodichloromethane was computed using the UNIFAC method.…”

Section: Predicted Concentration Profilesmentioning

confidence: 99%

Stripping of trihalomethanes from drinking water in a bubble‐column aerator

Velazquez

Estévez

1992

AIChE Journal

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Phase equilibria in very dilute mixtures of water and chlorinated hydrocarbons. Part I—experimental results

Cited by 25 publications

References 4 publications

Determination of Air−Water Partitioning of Volatile Halogenated Hydrocarbons by the Inert Gas Stripping Method

Determination of Air−Water Partitioning of Volatile Halogenated Hydrocarbons by the Inert Gas Stripping Method

Compilation and Correlation of Limiting Activity Coefficients of Nonelectrolytes in Water

Stripping of trihalomethanes from drinking water in a bubble‐column aerator

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