Perturbation velocities in gas‐liquid partition chromatographic columns

Stalkup, F.I.; Deans, H.A.

doi:10.1002/aic.690090124

Cited by 27 publications

(18 citation statements)

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“…If we neglect the adsorption of helium, the fist moment (mean residence time) for a pulse of hydrocarbon injected into a mixed carrier stream (mole fraction x ) is given by ( Stalkup and Deans, 1963) / d c ) ] . Chromatographic isotherms determined in this way are compared with the gravimetric isotherms in Figure 1.…”

Section: Resultsmentioning

confidence: 99%

Measurement of zeolitic diffusivities and equilibrium isotherms by chromatography

Shah

Ruthven

1977

AIChE Journal

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The chromatographic method has been used to study the sorption and diffusion of methane, ethane, propane, and cyclopropane in 5A molecular sieve. Both the equilibrium isotherms and the time constants for zeolitic diffusion, obtained from the chromatographic peaks, agree well with the values obtained previously by the gravimetric method, thus confirming the validity of the experimental technique. The results obtained in several previously reported chromatographic studies are reviewed, and it is shown that the apparent discrepancies between chromatographic and gravimetric data arise mainly from differences in the way in which the micropore diffusivity is defined. The relative advantages and disadvantages of the gravimetric and chromatographic methods are briefly considered.

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Section: Resultsmentioning

confidence: 99%

Measurement of zeolitic diffusivities and equilibrium isotherms by chromatography

Shah

Ruthven

1977

AIChE Journal

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“…Theoretical approaches designed for these specific circumstances have appeared in the literature but are not readily adaptable to more general systems. Generalized theories for systems of multiple interfering species have been outlined by Stalkup,and Deans (1963), Helfferich and Klein (1970), and by Deans et al (1970), but the variety of end-use equations that have been determined for specific experimental situations is very limited.…”

Section: Scopementioning

confidence: 99%

“…Isotopic tracers have been used for some determinations at finite concentration (Stalkup and Deans, 1963;Gilmer and Kobayashi, 1964; Koonce et al, 1965) and can be used for multicomponent systems with any number of species but the method is not always feasible for lack of the needed tracers. The objective of this work was to develop perturbation gas chromatography equations for sorption in multicomponent, finite concentration systems that are not limited to stoichiometric exchange.…”

Section: Scopementioning

confidence: 99%

Determination of multicomponent sorption equilibria using perturbation gas chromatography

Glover

Lau

1983

AIChE Journal

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efficient method for obtaining sorption equilibria for systems with up to two vapor phase components at finite concentration. The objective of this work was to obtain a theoretical result that could be used for experimeptal determinations of sorption of multiple interfering species at finite concentration. Results obtained are applicable for both non-stoichiometric and stoichiometric situations for systems that may have flowing phase velocity and volume changes associated with interphase transport and also may have interactions among the sorbed components. The dependence of each effluent peak characteristic velocity upon all of the component equilibrium isotherms requires that the equilibria be considered as a whole by simultaneously fitting a set of composition grid perturbation response data to appropriate isotherm surface equations.

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“…Flow rates from the cylinder are controlled by valve (1) and are measured with a soap-bubble flowmeter. A small portion of carrier gas controlled by valve (4) goes through a reference line.…”

Section: Apparatus and Proceduresmentioning

confidence: 99%