VAPOR-LIQUID-EQUILIBRIUM OF POLYMER-SOLUTIONS USING A CUBIC EQUATION OF STATE

1994-07-01
ORBEY, N
SANDLER, SI
A recently proposed mixing rule has been combined with a cubic equation of state to correlate the vapor-liquid equilibria of various polymer + solvent and solvent + long chain hydrocarbon mixtures. We find that the two-parameter version of this model can correlate the solvent partial pressure in concentrated polymer solutions with high accuracy over a range of temperatures and pressures with temperature-independent parameters. For the solvent + long chain hydrocarbon systems, for which accurate vapor-phase concentrations are also important, the model is best used as a three-parameter correlation. Advantages of this approach are that it extends the application of cubic equations of state to polymer + solvent systems in a simple fashion and that generally only temperature-independent parameters are required which allow for accurate interpolation and extrapolation of available data.
AICHE JOURNAL

Suggestions

VAPOR-LIQUID-EQUILIBRIA OF SOME HYDROGEN PLUS HYDROCARBON SYSTEMS WITH THE WONG-SANDLER MIXING RULE
HUANG, H; SANDLER, SI; ORBEY, H (1994-05-10)
Owing to the highly supercritical nature of hydrogen in hydrogen-hydrocarbon systems, it is difficult to accurately predict, or even correlate, the phase behavior of such mixtures with cubic equations of state and conventional mixing rules, especially as the critical point of the mixture is approached. Here we show that an extended Peng-Robinson equation of state and the recently introduced Wong-Sandler mixing rule can correlate these systems successfully, and more importantly that the mixing rule parameter...
Steady-state parallel plate apparatus for measurement of diffusion coefficient in supercritical carbon dioxide
Tuan, DQ; Yener, Meryem Esra; Zollweg, JA; Harriott, P; Rizvi, SSH (1999-02-01)
A new, steady-state experimental system for measurement of the Fickian diffusion coefficients for solutes in supercritical carbon dioxide (SC-CO2) was designed and evaluated. Mass transfer between a Liquid solute and SC-CO2 was carried out in a parallel plate geometry where a porous metal sheet, immersed in the liquid phase, stabilized the interface. The SC-CO2 flowed over the porous metal sheet containing the liquid phase which was presaturated with CO2. The use of the porous metal sheet and a thin mobile ...
Approximate Analytical Solutions of the Dirac Equation for Yukawa Potential Plus Tensor Interaction with Any kappa-Value
Arda, Altug; Sever, Ramazan (2013-11-01)
Approximate analytical solutions of the Dirac equation are obtained for the Yukawa potential plus a tensor interaction with any kappa-value for the cases having the Dirac equation pseudospin and spin symmetry. The potential describing tensor interaction has a Yukawa-like form. Closed forms of the energy eigenvalue equations and the spinor wave functions are computed by using the Nikiforov-Uvarov method. It is observed that the energy eigenvalue equations are consistent with the ones obtained before. Our num...
Synthesis of polymer-supported TEMPO catalysts and their application in the oxidation of various alcohols
Tanyeli, Cihangir (2003-02-17)
We describe the synthesis of a recyclable polymer-supported TEMPO as a catalyst in the Anelli oxidation of various primary alcohols to afford the corresponding aldehydes in good yields. (C) 2003 Elsevier Science Ltd. All rights reserved.
Endohedrally halogen and interhalogen substituted C-70-AM1 study
Türker, Burhan Lemi (2002-12-09)
C-70 structure having a certain halogen (Cl-2, Br-2, I-2) or interhalogen molecule (BrCl, ICl, IBr) as the endohedral substituent was considered for semiempirical quantum chemical calculations at the level of AMI (RHF). All the endohedrally monosubstituted systems were found to be stable (inversely related to the bulkiness of the substituent) but endothermic (directly related to the size of the substituent). Some electronic and physicochemical properties of these systems were also reported.
Citation Formats
N. ORBEY and S. SANDLER, “VAPOR-LIQUID-EQUILIBRIUM OF POLYMER-SOLUTIONS USING A CUBIC EQUATION OF STATE,” AICHE JOURNAL, pp. 1203–1209, 1994, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65861.