Excess enthalpies of binary mixtures of n-heptane with hexane isomers

Kimura, Fumio; Benson, George C.; Halpin, Carl J.

doi:10.1016/0378-3812(83)85027-4

Cited by 113 publications

(48 citation statements)

References 9 publications

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“…Details of the equipment and its operation have been described previously (5,6). In studying the ternary systems, the excess molar enthalpy HE was measured for several pseudo-binary systems in which comp'iint 1 (PrOH) was added to binary mixtures of components 2 (MTBE) and 3 (n-C6, or br-C6, or c-C6) having a fixed mole ratio ~2 1 .~3 .…”

Section: Calorimetric Measurementsmentioning

confidence: 99%

Excess enthalpies of some (1-propanol + methyl tert-butyl ether + C₆-hydrocarbon) ternary systems at 298.15 K

Zhu¹,

Shen²,

Benson³

et al. 1994

Can. J. Chem.

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. Can. J. Chem. 72, 11 11 (1994).Calorimetric measurements of excess enthalpies are reported for the three ternary systems (1-propanol + methyl tert-butyl ether + (n-hexane, or 2,3-dimethylbutane, or cyclohexane)) at 298.15 K. Smoothing equations, fitted to the results, were used to construct constant enthalpy contours on a Roozeboom diagram for each of the systems. ExperimentalComponent liquids Anhydrous 1-propanol (PrOH) and methyl tert-butyl ether (MTBE) were obtained from the Aldrich Chemical Co. Pure Grade n-hexane (n-C6), 2,3-dimethylbutane (br-C6), and cyclohexane (c-C6) were obtained from the Phillips Chemical Co. All of these materials had stated purities exceeding 99 mol%. Their densities, measured at 298.15 K in an Anton-Paar digital densimeter, were 799.64, 735.56, 655.04, 657.13, and 774.04 kg m-3 for PrOH, MTBE, n-C6, br-C6, and c-C6, respectively. These are in reasonable agreement with the values 799.75, 735.3, 654.84, 657.02, and 773.89 kg mP3, compiled by the TRC (3, 4). Calorimetric measurementsExcess molar enthalpies HE at 298.15 f 0.005 K were measured in an LKB flow microcalorimeter. Details of the equipment and its operation have been described previously (5, 6). In studying the ternary systems, the excess molar enthalpy HE was measured for several pseudo-binary systems in which comp'iint 1 (PrOH) was added to binary mixtures of components 2 (MTBE) and 3 (n-C6, or br-C6, or c-C6) having a fixed mole ratio ~2 1 .~3 .These binaries were prepared by weighing. The excess molar enthalpy HE,,23 of the ternary system is then given by the relation where HElz3 is the excess molar enthalpy of the particular (MTBE + C6-hydrocarbon) binary. Over most of the PrOH mole fraction range, the errors of HE,,+,, are about 0.5% or 2 J mol-', whichever is larger. and [3] with HE,, from the footnote of Table 1. Results and discussion

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Section: Calorimetric Measurementsmentioning

confidence: 99%

Excess enthalpies of some (1-propanol + methyl tert-butyl ether + C₆-hydrocarbon) ternary systems at 298.15 K

Zhu¹,

Shen²,

Benson³

et al. 1994

Can. J. Chem.

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“…Excess enthalpies were determined in an LKB flow microcalorimeter (Model 10700-1) thermostated at 298.15 * 0.002 K. Details of this equipment and its modification have already been described (5,6). Over most of the mole fraction range, the errors of the excess molar enthalpy, HE, and the mole fraction, x, are estimated to be less than 0.5% and 5 x respectively.…”

Section: Calorimetric Measurementsmentioning

confidence: 99%

Excess enthalpies of dibutyl ether + n-alkane mixtures at 298.15 K

Benson¹,

Luo²,

Lu³

1988

Can. J. Chem.

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. Can. J. Chem. 66, 531 (1988).Calorimetric measurements of excess enthalpies are reported over the entire compos~tion range for dibutyl ether + 11-heptane, + n-deeane, + n-dodecane, and + n-hexadecane at 298.15 K. The results are compared with data from the literature, and a correlation of the excess enthalpies of dibutyl ether + n-alkane mixtures in terms of the Flory theory is described. The excess thermodynamic properties of rz-ether + n-alkane mixtures have not been investigated sufficiently to provide a good understanding of the molecular interactions in such systems. Some progress has been made in the application of quasi-chemical models in terms of group surface interactions ( I ) , but further experimental studies are needed to adjust the values of the interchange coefficients to include steric and orientational effects ( 2 , 3).A recent paper (4) from our laboratory reported measurements of the excess enthalpies of the binary mixtures: diethyl ether + n-heptane, + n-decane, + n-dodecane, and + nhexadecane. As an extension of that investigation, we have determined the excess enthalpies of binary mixtures of dibutyl ether with the same set of rz-alkanes.

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“…Details of the equipment and the operating procedure have been described previously. (3,4) In studying…”

Section: Methodsmentioning

confidence: 99%

Excess enthalpies of (2,2,4-trimethylpentane + cyclohexane + dodecane) at the temperature 298.15 K

Wang

Peng

Benson

et al. 2000

The Journal of Chemical Thermodynamics

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Excess enthalpies of binary mixtures of n-heptane with hexane isomers

Cited by 113 publications

References 9 publications

Excess enthalpies of some (1-propanol + methyl tert-butyl ether + C₆-hydrocarbon) ternary systems at 298.15 K

Excess enthalpies of some (1-propanol + methyl tert-butyl ether + C₆-hydrocarbon) ternary systems at 298.15 K

Excess enthalpies of dibutyl ether + n-alkane mixtures at 298.15 K

Excess enthalpies of (2,2,4-trimethylpentane + cyclohexane + dodecane) at the temperature 298.15 K

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Excess enthalpies of binary mixtures of n-heptane with hexane isomers

Cited by 113 publications

References 9 publications

Excess enthalpies of some (1-propanol + methyl tert-butyl ether + C6-hydrocarbon) ternary systems at 298.15 K

Excess enthalpies of some (1-propanol + methyl tert-butyl ether + C6-hydrocarbon) ternary systems at 298.15 K

Excess enthalpies of dibutyl ether + n-alkane mixtures at 298.15 K

Excess enthalpies of (2,2,4-trimethylpentane + cyclohexane + dodecane) at the temperature 298.15 K

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Excess enthalpies of some (1-propanol + methyl tert-butyl ether + C₆-hydrocarbon) ternary systems at 298.15 K

Excess enthalpies of some (1-propanol + methyl tert-butyl ether + C₆-hydrocarbon) ternary systems at 298.15 K