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The Full Pressure–Temperature Phase Envelope of a Mixture in 1000 Microfluidic Chambers
Author(s) -
Xu Yi,
Riordon Jason,
Cheng Xiang,
Bao Bo,
Sinton David
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201708238
Subject(s) - supercritical fluid , thermodynamics , dew point , phase diagram , bubble point , piston (optics) , envelope (radar) , chemistry , bubble , phase (matter) , volume (thermodynamics) , critical point (mathematics) , equation of state , materials science , mechanics , organic chemistry , physics , telecommunications , mathematical analysis , radar , mathematics , wavefront , computer science , optics
Knowing the thermodynamic state of complex mixtures—liquid, gas, supercritical or two‐phase—is essential to industrial chemical processes. Traditionally, phase diagrams are compiled piecemeal from individual measurements in a pressure–volume–temperature cell performed in series, where each point is subject to a long fluid equilibrium time. Herein, 1000 microfluidic chambers, each isolated by a liquid piston and set to a different pressure and temperature combination, provide the complete pressure–temperature phase diagram of a hydrocarbon mixture at once, including the thermodynamic phase envelope. Measurements closely match modeled values, with a standard deviation of 0.13 MPa between measurement and model for the dew and bubble point lines, and a difference of 0.04 MPa and 0.25 °C between measurement and model for the critical point.