Distillable Protic Ionic Liquid 2-(Hydroxy)ethylammonium Acetate (2-HEAA): Density, Vapor Pressure, Vapor–Liquid Equilibrium, and Solid–Liquid Equilibrium

2014 ◽  
Vol 53 (49) ◽  
pp. 19322-19330 ◽  
Author(s):  
Anne Penttilä ◽  
Petri Uusi-Kyyny ◽  
Ville Alopaeus
Keyword(s):  
Ionic Liquid ◽  
Vapor Pressure ◽  
Liquid Equilibrium ◽  
Protic Ionic Liquid ◽  
Vapor Liquid Equilibrium ◽  
Solid Liquid ◽  
Vapor Liquid

scholarly journals Vapor-liquid equilibrium of the ionic liquid 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-enium acetate and its mixtures with water

2019 ◽  
Author(s):  
Zachariah Baird ◽  
Petri Uusi-Kyyny ◽  
Ville Alopaeus ◽  
Joanna Witos ◽  
Antti Rantamäki ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Raw Materials ◽  
Stoichiometric Ratio ◽  
Protic Ionic Liquids ◽  
Liquid Equilibrium ◽  
Protic Ionic Liquid ◽  
Vapor Liquid Equilibrium ◽  
Acid And Base ◽  
Vapor Liquid

Ionic liquids have the potential to be used for extracting valuable chemicals from raw materials. These processes often involve water, and after extraction the water, or other chemicals, must be removed from the ionic liquid so it can be reused. To help in designing such processes, we present data on the vapor-liquid equilibrium of the system containing the protic ionic liquid 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-enium acetate, water, acetic acid, and 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene. Earlier studies have only focused on mixtures of water and an ionic liquid with a stoichiometric ratio of the ions. Here we also investigated mixtures containing an excess of the acid or base component because in real systems with protic ionic liquids the amount of acid and base in the mixture can vary. We modeled the data using both the ePC-SAFT and NRTL models, and we compared the performance of different modeling strategies. We also experimentally determined the vapor composition for a few of the samples, but none of the modeling strategies tested could accurately predict the concentration of the acid and base components in the vapor phase.

scholarly journals A new microebulliometer for the measurement of the vapor–liquid equilibrium of ionic liquid systems

2013 ◽  
Vol 354 ◽  
pp. 156-165 ◽  
Author(s):  
Pedro J. Carvalho ◽  
Imran Khan ◽  
António Morais ◽  
José F.O. Granjo ◽  
Nuno M.C. Oliveira ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Liquid Systems ◽  
Vapor Liquid

Isothermal Vapor-Liquid Equilibrium Measurement of Isobutanol + Isooctane/N-Heptane Binary Mixtures at Temperatures Range of 303.15-323.15 K

2020 ◽  
Vol 840 ◽  
pp. 501-506
Author(s):  
Ardika Nurmawati ◽  
Rizky Tetrisyanda ◽  
Gede Wibawa
Keyword(s):  
Vapor Pressure ◽  
Binary Mixtures ◽  
Published Data ◽  
Positive Deviation ◽  
Average Absolute Deviation ◽  
Liquid Equilibrium ◽  
Absolute Deviation ◽  
Vapor Liquid Equilibrium ◽  
Mole Fraction Range ◽  
Vapor Liquid

The addition of alcohol as an oxygenated compound in gasoline blends may increase the vapor pressure of gasoline mixture. As a result, the study of vapor-liquid equilibrium for gasoline component and alcohol is necessary. In this study, the vapor-liquid equilibrium of isobutanol – isooctane/n-heptane blends were obtained experimentally at temperatures in the range 303.15 to 323.15 K using modified simple quasi-static ebulliometer. The apparatus was validated by comparing the vapor pressure of pure isobutanol, isooctane, and n-heptane with the published data and giving average absolute deviation (AAD) between experimental and calculated ones with magnitude less than 1.0%. The addition of isobutanol with the mole fraction range from 0.2 to 0.6 would increase the vapor pressure of the isooctane and n-heptane up to 12% and 14% respectively. The vapor pressure of binary mixtures was correlated with the Wilson, Non-random two-liquid (NRTL), and Universal quasi-chemical (UNIQUAC) equations with AAD 1.6%, 1.5%, and 1.7%, respectively for isobutanol + isooctane system and 1.8%, 1.7%, and 2.0%, respectively for isobutanol + n-heptane system. The systems studied show positive deviation from Raoult’s Law.

Solid-Liquid Equilibrium of Xylose in Water and Ethanol/Water Mixture

2011 ◽  
Vol 6 (1) ◽  
Author(s):  
Ernesto A Martínez ◽  
Marco Giulietti ◽  
Mauricio Uematsu ◽  
Silas Derenzo ◽  
João B Almeida e Silva
Keyword(s):  
Experimental Data ◽  
Prediction Models ◽  
Ternary Systems ◽  
The Other ◽  
Water Mixture ◽  
Liquid Equilibrium ◽  
Average Deviation ◽  
Vapor Liquid Equilibrium ◽  
Solid Liquid ◽  
Vapor Liquid

This work deals with the study of thermodynamical models for the solid-liquid equilibrium (SLE) and comparing its performance with experimental data. The xylose solubility in the xylose-water and xylose-water-ethanol systems has been measured using a variant of the isothermal method. A total of 12 experiments were performed in a 100 mL glass jacketed crystallizer with helix-type agitator by changing the temperature from 0 to 60°C. The solution was mixed during 72 h with an IKA Labortechnic, RW 20.n agitator at 450 rpm. Later, the experimental and reported results were fitted using the prediction models based on the vapor-liquid-equilibrium (UNIFAC (Universal Functional Activity Coefficient), ASOG (Analytical Solutions of Groups) and GSP (Group Solubility Parameter); semi-empirical models based on the vapor-liquid-equilibrium (VLE) (UNIQUAC (Universal Quasi Chemical), Wilson and NRTL (Non Randon Two Liquid)) on the solid-liquid-equilibrium, and empirical model with fitted parameters (Nývlt, λh, Margules with 1 and 2 parameters). The results showed that the UNIQUAC model with fitted parameters can describe the SLE with reasonable accuracy (1.28 and 3.36% for binary and ternary systems, respectively). The average deviation was the arithmetic mean of the deviations. On the other hand, the other methods resulted in poor agreement with the system’s behavior presenting systematic deviations from the experimental data.

Sign in / Sign up

Export Citation Format

Share Document