Thermodynamic consistency of low pressure equilibrium data of water + congener mixtures using a versatile equation of state

Faúndez, Claudio A.; Ramírez, Gerardo A.; Valderrama, José O.

doi:10.1016/j.jtice.2016.07.017

Cited by 3 publications

(1 citation statement)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Simulation and optimization are not used in a right way in this field, an overestimation of equipment or high energyconsuming conditions being usually applied due to imprecise calculations. In fact, the difficulties for simulation of these processes have been widely commented upon earlier [1][2][3][4][5][6]. As a continuation of previous works related to flavor components for alcoholic beverages [7][8][9][10][11][12][13] we present in this paper the temperature dependence of the density and ultrasonic velocity of the mixture ethanol + water + 2propanol at the range 288.15 -323.15 K and atmospheric pressure, as a function of molar fraction.…”

Section: Introductionmentioning

confidence: 77%

Thermodynamics of Ethanol + Water + 2-Propanol mixture at the range of temperature 288.15-323.15 K

Barros

Andrade

Iglesias

2018

International Journal of Thermodynamics

View full text Add to dashboard Cite

The packing properties of hydroxylic chemicals is very unusual, however these substances find extensive application in food and alcoholic beverage industry. When short alcohols are mixed with water, the entropy of the final system increases far less than we could expected for an ideal solution of randomly interacting molecules. Experimental works on thermodynamics helps to understand how hydrophobic head groups of alcohol molecules in aqueous media cluster together. To this aim, the densities and ultrasonic velocity of the ternary mixtures ethanol + water + 2-propanol at 288.15-323.15 K and atmospheric pressure, have been measured over the whole concentration range, due to the importance of the 2-propanol among the flavor compounds contained into spirit beverages. The experimental data have been analyzed in terms of different theoretical models, an adequate agreement between the experimental and predicted values both in magnitude and sign being obtained, despite the high non-ideal trend. The obtained experimental values indicate varying extent of interstitial accommodation among unlike molecules with strong influence of steric hindrance among aliphatic ends.

show abstract