Abstract
Vapor pressures and liquid densities for 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) and ammonia (NH3) mixtures were measured over a wide range of temperatures (283.15 to 363.15 K) and mole fractions. The vapor pressures of the mixtures were measured with a static method. The measurement expanded uncertainty in the vapor pressure was 0.5%-5.0% (k = 2). The experimental values were compared with literature data and correlated with Antoine's equation with an average absolute deviations of 1.85% and a bias of 0.01%. The estimated expanded uncertainty (0.95 level of confidence) of this correlation was 5%. Liquid densities of the [BMIM][PF6] and NH3 mixtures were measured in the temperature range of 283.15-363.15 K and a pressure range of 10.0 to 30.0 MPa. Liquid densities were measured with a piezometer. The measurement expanded uncertainty in the density was 0.2% (k = 2). The experimental values were correlated with a Tait equation with an average absolute deviations of 0.06% and a bias of -0.01%. The estimated expanded uncertainty (0.95 level of confidence) of this correlation was 0.2%.
Original language | English |
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Pages (from-to) | 101-116 |
Number of pages | 16 |
Journal | High Temperatures - High Pressures |
Volume | 47 |
Issue number | 2 |
Publication status | Published - 2018 |
Keywords
- Ammonia
- Density
- High pressure
- Ionic liquid
- Mixture
- Vapor pressure
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Physical and Theoretical Chemistry