Abstract
We describe an apparatus used to make precise determinations of the coexistence regimes and critical points of single, binary, and multi-component fluids. The design allows semi-automated measurements to be made over a pressure range of 1-300 bar and a temperature range of-20 to +120°C with a stability of ±2 mK. We describe the use of the apparatus in determining the critical points and phase boundaries of single component and binary mixtures through a number of optical, acoustic, and shear-mode piezoelectric sensor methods. We conclude that the accurate determination of bubble-point lines, dew-point lines and critical points is best achieved by making measurement using a number of complementary techniques.
Original language | English |
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Pages (from-to) | 259-272 |
Number of pages | 14 |
Journal | Journal of Supercritical Fluids |
Volume | 30 |
Issue number | 3 |
DOIs | |
Publication status | Published - Aug 2004 |
Externally published | Yes |
Keywords
- Phase boundaries
- Sound velocity
- Supercritical
- Viscosity
ASJC Scopus subject areas
- General Chemical Engineering
- Condensed Matter Physics
- Physical and Theoretical Chemistry