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Viscosity, Density, and Volatility of Binary Mixtures of Imidazole, 2-Methylimidazole, 2,4,5-Trimethylimidazole, and 1,2,4,5-Tetramethylimidazole with Water

  • Sigvart Evjen
    Sigvart Evjen
    Department of Chemistry, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
  • Ricardo Wanderley
    Ricardo Wanderley
    Department of Chemical Engineering, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
  • Anne Fiksdahl
    Anne Fiksdahl
    Department of Chemistry, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
  • , and 
  • Hanna K. Knuutila*
    Hanna K. Knuutila
    Department of Chemical Engineering, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
    *E-mail: [email protected]. Tel.: + 47 735 94119.
Cite this: J. Chem. Eng. Data 2019, 64, 2, 507–516
Publication Date (Web):January 30, 2019
https://doi.org/10.1021/acs.jced.8b00674
Copyright © 2019 American Chemical Society

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    Abstract

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    Experimental measurements and modeling of the density and viscosity of binary solutions of imidazole, 2-methylimidazole, 2,4,5-trimethylimidazole, and 1,2,4,5-tetramethylimidazole with water have been conducted. The parameterization of viscosity data was conducted using a nonrandom two-liquid (NRTL)-model, with absolute average relative deviation (AARD) of 1% for imidazole, 0.8% for 2-methylimidazole, 3% for 2,4,5-trimethylimidazole, and 5% for 1,2,4,5-tetramethylimidazole. The density correlations represent the experimental data for imidazole solutions with an AARD of 0.1% for all four imidazoles. Viscosities of aqueous imidazole solutions were found to increase upon charging solutions with CO2. Vapor–liquid equilibrium (P, T, x, y) in the range from 313 to 373 K for the aqueous solutions were performed using an ebulliometer. The results show that the tested imidazoles exhibit low vapor pressures in aqueous solutions. Finally, it was found there is an insignificant dependence of water activity on temperature within the range of the present study.

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