Henry's law constants derived from equilibrium static cell measurements for dilute organic-water mixtures
Document Type
Article
Publication Date
7-30-2001
Abstract
The relationship of pressure and composition in the Henry's law regime has been experimentally measured in an equilibrium static cell for a set of binary organic-water mixtures. The solutes range from hydrophilic materials, such as alcohol to extremely hydrophobic components, such as toluene and 1,2-dichloroethane. The goal of this study is to determine the effective concentration range over which Henry's law reasonably approximates the gas-liquid partitioning. With the goal of obtaining accurate values of Henry's law constant, several methodologies are critically compared for the aqueous solutes examined experimentally. The apparatus employed can determine gas-liquid partitioning coefficients through a variety of methods including direct phase concentration ratios, equilibrium partitioning in closed systems (EPICS), and application of the coexistence equation for γ∞. Results to date indicate a more complex dP/dx behavior in the dilute region than previously assumed; and Henry's law constant may not strictly apply to hydrophobic materials until the solute concentration is so low that analytical detection is problematic. Copyright © 2001 Elsevier Science B.V.
Publication Title
Fluid Phase Equilibria
Recommended Citation
Ayuttaya, P.,
Rogers, T.,
Mullins, M.,
&
Kline, A.
(2001).
Henry's law constants derived from equilibrium static cell measurements for dilute organic-water mixtures.
Fluid Phase Equilibria,
185(1-2), 359-377.
http://doi.org/10.1016/S0378-3812(01)00484-8
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/7525