Multiphase behavior in ternary fluid mixtures: a case study of the isopropanol-water-CO2 system at elevated pressures
✍ Scribed by J.R. Diandreth; M.E. Paulaitis
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 864 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0009-2509
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✦ Synopsis
Phase behavior involving three and four fluid phases is predicted for ternary mixtures of isopropanol, water and CO, at temperatures and pressures near the critical point ofC0,. These predictions are based on the Peng-Robinson equation of state and selected experimental measurements of phase compositions for the L,L,G, L,L,L, and L,L,L,G equilibria for the ternary mixture. The calculated results show that this equation of state can describe several unique features of the phase diagram. These features include tricritical points, secondary critical endpoints, and a four-phase L,L,L,G equilibrium. Although quantitative agreement with measured phase compositions was not obtained, the Peng-Robinson equation did predict all the regions of multiple equilibrium phases that were observed in the experiments including those regions not used IO obtain the equation-of-state parameters.