Measurement of ternary polymer/solvent equilibrium data by vapor-phase infrared spectroscopy

Yürekli, Yılmaz; Altınkaya, Sacide Alsoy

doi:10.1016/j.fluid.2008.11.002

Cited by 9 publications

(8 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Supercritical fluids are applied in the natural gas 1, petroleum 1, 2, food 3, 4, polymer 5, 6, and pharmaceutical 3, 7 industries. These solvents may provide improved selectivity or solvating ability, enabling the execution of difficult extractions.…”

Section: Introductionmentioning

confidence: 99%

Analytic Setup for Multicomponent High‐Pressure Phase Equilibria via Dual Online Gas Chromatography

2015

View full text Add to dashboard Cite

A high-pressure analytic phase equilibria setup, capable of operation at 150°C and 30 MPa, was developed. The variable-volume view cell contains two heightadjustable samplers enabling simultaneous sampling from two phases. Concurrent analysis of both samples was performed with dual online gas chromatography (GC). The GC comprises two inlets, four columns, two switch valves, and three detectors, arranged in parallel pathways. Quantitative detector calibrations were used. The setup was validated by sampling from a one-phase ternary of known composition, and comparison with binary and ternary literature data. The setup produces accurate phase composition data for supercritical systems and is wellsuited to handle mixture constituents ranging from volatile gases to mid-length hydrocarbons.

show abstract

Section: Introductionmentioning

confidence: 99%

Analytic Setup for Multicomponent High‐Pressure Phase Equilibria via Dual Online Gas Chromatography

2015

View full text Add to dashboard Cite

show abstract

“…The solubility of pure and mixed low molecular weight species in glassy polymers is an essential information in applications such as chemical sensors, , packaging, , and membrane separations. , While the experimental evaluation of the solubility of pure gases in solid polymers relies on several, well-established procedures and many data exist in the literature for a wide variety of polymers of industrial interest, very few and delicate time-consuming experimental procedures have been established to measure the solubility of mixed gases or vapors in a polymeric material − and only a few data are available for glassy polymers. − Therefore, it is important to develop mathematical models that permit the calculation of the solubility of multicomponent gas mixtures in glassy polymers on the basis of pure components properties and possibly of pure gas solubility only.…”

Section: Introductionmentioning

confidence: 99%

Predictive Model for the Solubility of Fluid Mixtures in Glassy Polymers

et al. 2011

View full text Add to dashboard Cite

The estimation of the solubility of fluid mixtures in polymeric phases is an essential prerequisite for membrane separations and in the design of several devices, such as chemical sensors: the presence of swelling and strongly interacting components in the fluid mixture can often cause rather large deviations from the pure component sorption behavior. For rubbery polymers, the usual equilibrium tools such as the multicomponent versions of the equation of state (EoS) models can be adopted, while for the case of glassy polymers, which are not at equilibrium, such an approach cannot be followed. The general model called nonequilibrium thermodynamics of glassy polymers (NET-GP) has proved to be a successful tool for predicting the solubility of pure gases, vapors and liquids in glassy polymers, and it is here applied to the prediction of multicomponent fluid solubility. In particular, three gas–gas–polymer systems, which show significant deviations from the ideal behavior, are examined at room temperature and various pressures: CH4/CO2 in poly(2,6-dimethyl-1,4-phenylene oxide) (PPO), C2H4/CO2, and N2O/CO2 in poly(methyl methacrylate) (PMMA). The maximum deviation between experimental data and the model predictions is equal to 10%, using as input only the pure component parameters and the binary parameters evaluated from pure gas sorption data. The model thus proves to be a reliable tool to estimate the mixed gas solubility in glassy polymers, in the common case in which such data are not experimentally available for the system of interest.

show abstract

“…The knowledge of the solubility of fluid mixtures in polymers is essential for several industrial applications, although at the moment only a very few, time-consuming procedures have been established to measure mixed gas or vapor sorption in polymers. − Compared to pure gas solubility, the number of experimental data sets available in the literature for multicomponent sorption in polymers is rather limited. Most of the studies in this field focus on removal of solvent mixtures from polymers, and the data are obtained by inverse gas chromatography (IGC) over limited ranges of operating conditions, often with little industrial interest. − Indeed, the temperatures explored in these cases are often far above those of interest for most of the polymers considered, the pressures investigated are rather low (usually atmospheric), and the range of compositions studied are very narrow, since at least one of the penetrants is present in trace amounts in the gaseous phase.…”

Section: Introductionmentioning

confidence: 99%

Equation of State Modeling of the Solubility of CO₂/C₂H₆ Mixtures in Cross-Linked Poly(ethylene oxide)

Minelli

Angelis

Baschetti

et al. 2015

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The solubility of gaseous mixtures of CO 2 and C 2 H 6 in cross-linked poly(ethylene oxide) (XLPEO) has been modeled over a wide range of temperatures, pressures, and compositions with the Sanchez−Lacombe lattice fluid equation of state (LF EoS). The model binary gas−polymer parameters have been determined from pure gas solubility data and kept constant with temperature and composition. Multicomponent solubility is then calculated with no additional adjustable parameters, using a fully predictive procedure. The LF EoS model describes well the mixed gas solubility behavior data over wide ranges of temperature (from −20 to 35°C), pressure (0−20 atm), and composition. The model also allows the representation of the solubility selectivity behavior of XLPEO at different conditions, permitting an a priori determination that ethane solubility is significantly enhanced by the presence of CO 2 , with a consequent reduction in CO 2 /C 2 H 6 solubility selectivity relative to the pure gas value. In this regard, the behavior of this rubbery polymer is opposite that of many glassy systems, in which competitive sorption is often dominant, and the solubility of the less soluble gas (i.e., C 2 H 6 in this case) is decreased by the presence of CO 2 , and the CO 2 solubility selectivity is enhanced with respect to the pure gas value.

show abstract

Measurement of ternary polymer/solvent equilibrium data by vapor-phase infrared spectroscopy

Cited by 9 publications

References 19 publications

Analytic Setup for Multicomponent High‐Pressure Phase Equilibria via Dual Online Gas Chromatography

Analytic Setup for Multicomponent High‐Pressure Phase Equilibria via Dual Online Gas Chromatography

Predictive Model for the Solubility of Fluid Mixtures in Glassy Polymers

Equation of State Modeling of the Solubility of CO₂/C₂H₆ Mixtures in Cross-Linked Poly(ethylene oxide)

Contact Info

Product

Resources

About

Measurement of ternary polymer/solvent equilibrium data by vapor-phase infrared spectroscopy

Cited by 9 publications

References 19 publications

Analytic Setup for Multicomponent High‐Pressure Phase Equilibria via Dual Online Gas Chromatography

Analytic Setup for Multicomponent High‐Pressure Phase Equilibria via Dual Online Gas Chromatography

Predictive Model for the Solubility of Fluid Mixtures in Glassy Polymers

Equation of State Modeling of the Solubility of CO2/C2H6 Mixtures in Cross-Linked Poly(ethylene oxide)

Contact Info

Product

Resources

About

Equation of State Modeling of the Solubility of CO₂/C₂H₆ Mixtures in Cross-Linked Poly(ethylene oxide)