Prediction of Diffusivities for Association Complex Forming Alcohol Solvent Systems

Mohan, V.; Srinivasan, D.

doi:10.1080/00986448408940147

Cited by 3 publications

(4 citation statements)

References 14 publications

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“…The polymerization constant of ethanol is 393.5 at 298.16 K, according to Mohan and Srnivasan . The Vant' Hoff equation fixes its dependence with temperature as where Δ is the hydrogen-bonding enthalpy, that can be aproximated 70 by −25 kJ mol -1 .…”

Section: Resultsmentioning

confidence: 99%

“…The polymerization constant of ethanol is 393.5 at 298.16 K, according to Mohan and Srnivasan. 22 The Vant' Hoff equation fixes its dependence with temperature as…”

Section: Comparison Of Diffusivities In Mixtures Withmentioning

confidence: 99%

“…21,22 Alcohol polymerization and solute-solvent complexation are supposed to be like chemical reactions, and the ternary system becomes a multicomponent solution, where monomers, oligomers, polymers, and all types of complexes diffuse.…”

Section: Introductionmentioning

confidence: 99%

“…The fundamental law of diffusion, Fick's law, can be modified to take into account the association effects through mass balances and chemical equilibrium constants. , Alcohol polymerization and solute−solvent complexation are supposed to be like chemical reactions, and the ternary system becomes a multicomponent solution, where monomers, oligomers, polymers, and all types of complexes diffuse.…”

Section: Introductionmentioning

confidence: 99%

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Diffusion of Benzyl Acetate, 2-Phenylethyl Acetate, 3-Phenylpropyl Acetate, and Dibenzyl Ether in Mixtures of Carbon Dioxide and Ethanol

Suárez-Iglesias

Medina

Pizarro

et al. 2007

Ind. Eng. Chem. Res.

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Diffusion coefficients of four solutes at infinite dilution (benzyl acetate, 2-phenylethyl acetate, 3-phenylpropyl acetate, and dibenzyl ether) were measured in the system CO 2 + ethanol from 313.16 to 333.16 K and pressures between 15 and 35 MPa over the full concentration range of the CO 2 + ethanol mixture. The diffusional behavior in the mixed solvent was compared with the estimation of seven simple predictive equations, Le Blanc, Wilke-Chang, Holmes-Olander-Wilke, Tang-Himmelblau (two formulas), Perkins-Geankoplis, and Leffler-Cullinam, observing that the first two give errors between 17 and 30% and that deviations lower than 11% are only obtained with the expressions of Tang-Himmelblau. Nevertheless, as none of the studied equations considers the self-association of ethanol nor complex formation between solute and alcohol molecules, the model of Lusis-Ratcliff and Mohan-Srnivasan was extended to a ternary liquid-supercritical system with the diffusing component dilute, obtaining average absolute deviations lower than 4.6% for the diffusivities of the four solutes. Nevertheless, the extension of this model is correlative (it needs one adjustable parameter for each solute), not predictive.

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Section: Resultsmentioning

confidence: 99%

“…The polymerization constant of ethanol is 393.5 at 298.16 K, according to Mohan and Srnivasan. 22 The Vant' Hoff equation fixes its dependence with temperature as…”

Section: Comparison Of Diffusivities In Mixtures Withmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations