Determination of Vapor–Liquid Equilibrium Data in Microfluidic Segmented Flows at Elevated Pressures Using Raman Spectroscopy

A fast, noninvasive, and efficient analytical measurement strategy for the characterization of vapor–liquid equilibria (VLE) is presented, which is based on phase (state of matter) selective Raman spectroscopy in multiphase flows inside microcapillay systems (MCS). Isothermal VLE data were measured...

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Bibliographic Details
Published in:Analytical chemistry (Washington) 2015-08, Vol.87 (16), p.8165-8172
Main Authors: Luther, Sebastian K, Stehle, Simon, Weihs, Kristian, Will, Stefan, Braeuer, Andreas
Format: Article
Language:English
Subjects:
Acetone
Capillarity
Carbon dioxide
Elevated
Equilibrium
Mathematical analysis
Multiphase flow
Pressure
Raman spectroscopy
Spectrum analysis
Strategy
Temperature
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Summary:A fast, noninvasive, and efficient analytical measurement strategy for the characterization of vapor–liquid equilibria (VLE) is presented, which is based on phase (state of matter) selective Raman spectroscopy in multiphase flows inside microcapillay systems (MCS). Isothermal VLE data were measured in binary and ternary mixtures composed of acetone, water, carbon dioxide or nitrogen at elevated pressures up to 10 MPa and temperatures up to 333 K. For validation, the obtained data were compared with literature data and reference measurements in a high-pressure variable volume cell. Additionally, the mixtures were investigated at temperatures and pressures where no data is available in literature to extend the high-pressure VLE database.
ISSN:0003-2700
1520-6882
DOI:10.1021/acs.analchem.5b00699