Limiting activity coefficient measurements in binary mixtures of dichloromethane and 1 alkanols (C1-C4)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F16%3A43902410" target="_blank" >RIV/60461373:22340/16:43902410 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0378381215302429" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0378381215302429</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fluid.2015.11.037" target="_blank" >10.1016/j.fluid.2015.11.037</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Limiting activity coefficient measurements in binary mixtures of dichloromethane and 1 alkanols (C1-C4)

Popis výsledku v původním jazyce

Limiting activity coefficients in binary mixtures of dichloromethane with four lower 1 alkanols (C1-C4) were experimentally determined employing alternatively the techniques of inert gas stripping, comparative ebulliometry, Rayleigh distillation, and differential distillation. For each case, the suitable technique was chosen on the basis of the limiting relative volatility of the solute and/or volatility of the solvent. The measurements yielding data of good accuracy (relative standard uncertainty of limiting activity coefficients from 0.01 to 0.03) were carried out at several temperatures in the range from (283 to 333) K. The variation of limiting activity coefficients with temperature was fitted by a suitable two- or three-parameter equation and compared with available literature information on both limiting activity coefficients and calorimetric partial molar excess enthalpies at infinite dilution. The performance of the leading prediction method Modified UNIFAC was further examined using these new data. Concentration dependences of activity coefficients calculated from their infinite dilution values using van Laar equation were found to agree well with those inferred from reliable VLE data from the literature. The occurrence of an azeotropic point was tested for the systems under study and the temperature dependence of the azeotropic point composition was estimated for mixtures of dichloromethane with methanol and ethanol.

Název v anglickém jazyce

Limiting activity coefficient measurements in binary mixtures of dichloromethane and 1 alkanols (C1-C4)

Popis výsledku anglicky

Limiting activity coefficients in binary mixtures of dichloromethane with four lower 1 alkanols (C1-C4) were experimentally determined employing alternatively the techniques of inert gas stripping, comparative ebulliometry, Rayleigh distillation, and differential distillation. For each case, the suitable technique was chosen on the basis of the limiting relative volatility of the solute and/or volatility of the solvent. The measurements yielding data of good accuracy (relative standard uncertainty of limiting activity coefficients from 0.01 to 0.03) were carried out at several temperatures in the range from (283 to 333) K. The variation of limiting activity coefficients with temperature was fitted by a suitable two- or three-parameter equation and compared with available literature information on both limiting activity coefficients and calorimetric partial molar excess enthalpies at infinite dilution. The performance of the leading prediction method Modified UNIFAC was further examined using these new data. Concentration dependences of activity coefficients calculated from their infinite dilution values using van Laar equation were found to agree well with those inferred from reliable VLE data from the literature. The occurrence of an azeotropic point was tested for the systems under study and the temperature dependence of the azeotropic point composition was estimated for mixtures of dichloromethane with methanol and ethanol.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Fluid Phase Equilibria

ISSN

0378-3812

e-ISSN

—

Svazek periodika

411

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

59-65

Kód UT WoS článku

000369465600008

EID výsledku v databázi Scopus

2-s2.0-84949819049