Adsorption of a gaseous mixture of ethane and propane on a carbon molecular sieve

Nakahara, Tomoko; Hirata, Mitsuho; Komatsu, Shunji

doi:10.1021/je00024a020

Cited by 23 publications

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“…7. Comparable results were reported by Nakahara et al (1981) for the adsorption of mixtures of ethane and propane on a carbon molecular sieve. However, the results of the present study are not in agreement with those reported by Buss (1995) in a similar study on equilibrium adsorption of carbon dioxide-methane mixtures on a large pore activated carbon with low energetic heterogeneity.…”

Section: Discussionsupporting

confidence: 69%

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et al. 2000

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Single gas adsorption isotherms of methane and carbon dioxide on micro-porous Norit RB1 activated carbon were determined in a gravimetric analyser in the temperature range of 292 to 349 K and pressures to 0.8 Mpa. Furthermore binary isotherms of carbon dioxide and methane mixtures were determined at 292 K and pressures up to 0.65 MPa. Adsorbed phase compositions were determined from the gravimetric data by the rigorous thermodynamic method of Van Ness.These experimental binary equilibrium data were compared with equilibrium data calculated by the Ideal Adsorbed Solution (IAS) model. Only moderate agreement could be obtained.Finally, activity coefficients, accounting for the non-ideality of the adsorbate mixture, were calculated from the experimental data. The Wilson equation, derived for bulk solutions, was fitted on these activity data and the Wilson interaction parameters were determined. The Wilson equation proved to correlate the experimental data reasonably. However, the Wilson interaction parameters are not only completely different from those found for bulk solutions, but also the physical interpretation of these parameter values is completely lacking.It is concluded that new solution models should be developed encompassing both non-ideal solution behaviour and surface heterogeneity.

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Section: Discussionsupporting

confidence: 69%

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et al. 2000

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“…6 PCB activated carbon (Ritter and Yang, 1987). c Molecular sieve carbon (Nakahara et al, 1981). d Silica (Markham and Benton, 1931).…”

Section: Resultsmentioning

confidence: 99%

An extended Langmuir model for adsorption of gas mixtures on heterogeneous surfaces

Kapoor¹,

Ritter²,

Yang³

1990

Langmuir

110

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“…Binary mixture adsorption equilibria on molecular sieve carbon 5A at 303 K and 100 Torr. ( ) C3H8-C2H6 (Nakahara et al, 1981), (O) C2H4-C3H6 (Nakahara et al, 1982).…”

Section: Resultsmentioning

confidence: 99%

“…Comparison of Predictions of Binary Mixture on Molecular Sieve Carbon 5A(Nakahara et al, 1981(Nakahara et al, , 1982Konno et …”

mentioning

confidence: 99%

A simple potential-theory model for predicting mixed-gas adsorption

Doong¹,

Yang²

1988

Ind. Eng. Chem. Res.

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The Dubinin-Astakhov equation, which is based on the micropore volume filling theory, is extended to mixed-gas adsorption by using the concept of maximum available pore volume. The proposed model requires only single-gas data for predicting mixed-gas adsorption; no additional equation, such as the Lewis relationship, is needed. The proposed model is not iterative, and the calculation involved is extremely simple. The model has been tested against experimental data for 16 binary mixture systems involving a wide variety of adsorbents and a wide range of pressures, with satisfactory results. It also compares favorably or equally satisfactorily with the ideal adsorbed solution theory, the Grant-Manes model, and an extension of the DA equation proposed by Bering et al. However, all three of these methods require iterative (numerical) computation.

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Adsorption of a gaseous mixture of ethane and propane on a carbon molecular sieve

Cited by 23 publications

References 0 publications

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An extended Langmuir model for adsorption of gas mixtures on heterogeneous surfaces

A simple potential-theory model for predicting mixed-gas adsorption

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