Journal
FLUID PHASE EQUILIBRIA
Volume 348, Issue -, Pages 33-38Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fluid.2013.03.012
Keywords
Ionic-liquids; Equation of state; Kwak-Mansoori; Thermodynamic consistency test
Funding
- National Council for Scientific and Technological Research (CONICYT) [FONDECYT 1070025]
- Direction of Research of the University of Conception [DIUC 211.011.054-1.0]
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Phase equilibrium data of temperature, pressure and solubility (T-P-x) of ammonia in different types of ionic liquids over wide ranges of temperatures and pressures are modeled and tested for thermodynamic consistency. The modified Peng-Robinson equation of state proposed by Kwak and Mansoori is used for correlating the isothermal PX data and a flexible thermodynamic consistency method applied to analyze forty seven isothermal P-x data available in the open literature. Modeling is found acceptable in all cases, meaning that deviations in correlating the data are low, proving at the same time the claimed flexibility of a well-founded model that uses simple van der Waals mixing rules. For all cases, the thermodynamic consistency method gives a clear conclusion about consistency or inconsistency of a set of experimental T-P-x data based on the established criteria. (C) 2013 Elsevier B.V. All rights reserved.
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