Physicochemical Measurements by Gas Chromatography

Kobayashi, Riki; Chappelear, Patsy S.; Deans, H.A.

doi:10.1021/ie50694a011

Cited by 75 publications

(13 citation statements)

References 45 publications

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“…The use of chromatography to measure thermodynamic properties has been reviewed by Kobayashi et al (1967) and by Young ( 1968) and by Guillet (1973). Measurement of the solubilities of solutes in polymer melts by gasliquid chromatography has been discussed by Smidsr d and Guillet ( 1969), Hammers and de Ligny (1971), {atterson et al (1971), Newman and Prausnitz (1972), and Brockmeier et al (1972).…”

Section: Conclusion a N D Significancementioning

confidence: 99%

Solubilities of ethylene and other organic solutes in liquid, low‐density polyethylene in the region 124° to 300°C

Maloney

Prausnitz

1976

AIChE Journal

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Section: Conclusion a N D Significancementioning

confidence: 99%

Solubilities of ethylene and other organic solutes in liquid, low‐density polyethylene in the region 124° to 300°C

Maloney

Prausnitz

1976

AIChE Journal

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“…Several authors have discussed the use of gas chromatography to obtain infinite-dilution activity coefficients of volatile fluids in nonvolatile liquids (Porter et al, 1956;Cruickshank et al, 1966;Kobayashi et al, 1967;Young, 1968). SmidsrZd and Guillet (1969) applied gas chromatography to polymer-solvent systems and more recently, several other investigators have studied polymer-solvent interactions using infinite-dilution gas chromatography (Hammers and de Ligny, 1971;Patterson et al, 1971;Recently, Brockmeier et al (1972) have extended this experimental method to finite solvent concentrations.…”

Section: Conclusion and Significancementioning

confidence: 99%

Thermodynamics of concentrated polymer solutions containing polyethylene, polyisobutylene, and copolymers of ethylene with vinyl acetate and propylene

Newman

Prausnitz

1973

AIChE Journal

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Gas-liquid chromatography is used to measure polymer-solvent interactions in polymer solutions where the solvent is at infinite dilution. Experimental data are presented for 24 binary polymer-solvent systems in the temperature range 50° to 150OC. A simple relation exists between the experimental retention volume data and the infinite dilution volatility; this volatility can be used to calculate the solvent vapor pressure over the polymer solution up to about 0.1 weight fraction solvent. Using concepts from the Prigogine-Flory theory of polymer solutions, Flory-Huggins x parameters for some polymer-hydrocarbon systems were correlated with the hydrocarbon's normal boiling temperature.

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“…These studies, as well as other A high-pressure sample injection valve, Valco Instruphysicochemical investigations by chromatography, are ments, had a lever which triggered a small microswitch cited by Kobayashi, Chappelear, and Deans. 7 The to give an accurate signal for the sample injection. …”

Section: A Apparatusmentioning

confidence: 99%

High-Pressure Adsorption: The Adsorption of Methane on Porasil at Low Temperatures and Elevated Pressures by Gas Chromatography

Hori

Kobayashi

1971

The Journal of Chemical Physics

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A highpressure volumetric gas adsorption system Rev. Sci. Instrum. 62, 2186 (1991; 10.1063/1.1142336 Apparatus for creep rupture testing in highpressure hydrogen at elevated temperatures Rev. Sci. Instrum. 53, 86 (1982); 10.1063/1.1136822 Isothermal, isobaric, elevated temperature, highpressure, flow calorimeter Rev. Sci. Instrum. 52, 1226 (1981);The adsorption of methane on fused silica beads has been studied by gas chromatography from 5 to 120 atm for -91.9 to 31.4°C. Only a few investigations of adsorption at high pressure have been reported due to the severe experimental difficulties. The "Hypothetical Perfect Gas" perturbation technique has been revised for application at high pressure to obtain the free gas volume. Two modifications in analysis are required: one for the steric effect of the perturbation gas and the second for the adsorption of the perturbation gas on the adsorbed phase. A second method of calculation based on solubility theory has been developed to correct for the solution of the perturbation gas in the adsorbed phase at high pressures. In addition to the usually measured differential or Gibbs adsorption, the gas chromatographic technique yields the absolute or total adsorption. This distinction is not observable at low pressures. A region of constant absolute adsorption in isotherms with increasing pressure was observed above the critical temperature of methane corresponding to a practically constant gas-phase fugacity. Application of limiting conditions to the measurements of Gibbs adsorption at high pressure gave the same value for the constant region of absolute adsorption isotherm, as well as the same value for the adsorbed phase density, which was evaluated from the dependence of the gas-phase volume upon the amount of absolute adsorption. This agreement substantiates the calculation method developed here.

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Physicochemical Measurements by Gas Chromatography

Cited by 75 publications

References 45 publications

Solubilities of ethylene and other organic solutes in liquid, low‐density polyethylene in the region 124° to 300°C

Solubilities of ethylene and other organic solutes in liquid, low‐density polyethylene in the region 124° to 300°C

Thermodynamics of concentrated polymer solutions containing polyethylene, polyisobutylene, and copolymers of ethylene with vinyl acetate and propylene

High-Pressure Adsorption: The Adsorption of Methane on Porasil at Low Temperatures and Elevated Pressures by Gas Chromatography

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