Adsorption of hydrocarbons on carbon molecular sieve. Application of volume filling theory

Nakahara, Tomoko; Hirata, Mitsuho; Ohmori, Toshiaki

doi:10.1021/je60065a002

Cited by 16 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The onset of non-ideal sorbate behaviour can be seen in Fig. 5 for the system ethane/propane on carbon molecular sieve 5A [44]. The active pressure of the two-component mixture was 13 300 Pa. At low mole fractions of propane in the adsorptive, a small indention occurs, resulting in a reduction of the propane mole fraction in adsorbate, compared to the ideal curve.…”

Section: Non-ideal Systems 31 Ideal Systemsmentioning

confidence: 97%

Calculation methods for multicomponent adsorption equilibria

et al. 1991

View full text Add to dashboard Cite

The knowledge of multicomponent adsorption equilibria is of great importance for the industrial design and application of adsorptive purification and separation processes. As the experimental determination of the required data is time-consuming and costly, theoretical help is desirable. This contribution presents and assesses the most common theoretical approaches to the calculation of multicomponent adsorption equilibria. The models are based on the assumption of an adsorbed solution, extension of the volume filling of micropores theory or statistical thermodynamics. These models are applied to different adsorptiveladsorbent systems with ideal and non-ideal equilibrium behaviour. It is established that, at low coverages of adsorbent surfaces, all theories provide good estimates of the adsorbed phase composition and total loading while, at high saturations, no model is completely satisfactory.

show abstract

Section: Non-ideal Systems 31 Ideal Systemsmentioning

confidence: 97%

Calculation methods for multicomponent adsorption equilibria

et al. 1991

View full text Add to dashboard Cite

show abstract

“…Thus, for example, Dubinin and Astakhov [48] showed the validity of TICC for C 6 H 6 adsorption on Saran carbon. Nakahara et al [49] proved the validity of DA model and the TICC for adsorption of hydrocarbons on carbon molecular sieves. On the other hand, Zukal and Kadlec [50] recorded the deviation from the TICC for ethanol adsorption on Desorex carbon, explained by different degrees of association in liquid and vapour phases.…”

Section: Introduction and The Aims Of The Studymentioning

confidence: 99%

Testing isotherm models and recovering empirical relationships for adsorption in microporous carbons using virtual carbon models and grand canonical Monte Carlo simulations

Terzyk¹,

Furmaniak²,

Gauden³

et al. 2008

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Using the plausible model of activated carbon proposed by Harris and co-workers and grand canonical Monte Carlo simulations, we study the applicability of standard methods for describing adsorption data on microporous carbons widely used in adsorption science. Two carbon structures are studied, one with a small distribution of micropores in the range up to 1 nm, and the other with micropores covering a wide range of porosity. For both structures, adsorption isotherms of noble gases (from Ne to Xe), carbon tetrachloride and benzene are simulated. The data obtained are considered in terms of Dubinin-Radushkevich plots. Moreover, for benzene and carbon tetrachloride the temperature invariance of the characteristic curve is also studied. We show that using simulated data some empirical relationships obtained from experiment can be successfully recovered. Next we test the applicability of Dubinin's related models including the Dubinin-Izotova, Dubinin-Radushkevich-Stoeckli, and Jaroniec-Choma equations. The results obtained demonstrate the limits and applications of the models studied in the field of carbon porosity characterization.

show abstract

“…The applicability of the Dubinin−Astakhov equation is generally demonstrated. First such papers were published by Dubinin and co-workers − but soon new impressive experimental evidence for the wide applicability of the Dubinin−Astakhov equation came from the works published by Japanese scientists. − …”

Section: Theorymentioning

confidence: 99%

A New Molecular Probe Method To Study Surface Topography of Carbonaceous Solid Surfaces

Rudziński¹,

Nieszporek²,

Cases³

et al. 1996

Langmuir

View full text Add to dashboard Cite

Adsorption on a heterogeneous surface of flexible molecules composed of a number of mers, like n-alkanes for instance, is strongly affected by topography of surface adsorption sites. Therefore, fitting to experimental adsorption isotherms, theoretical expressions developed for multisite-occupancy adsorption on heterogeneous surfaces characterized by random and patchwise topography should make it possible to distinguish whether a studied solid surface is characterized by random or by patchwise topography. For certain fundamental but also practical reasons, we took into consideration carbonaceous adsorbents. Following the general approach to multisite-occupancy adsorption published recently by Rudziński and Everett, we have developed here a generalized form of the Dubinin−Astakhov isotherm equation, taking into account surface topography and the interactions between the adsorbed molecules. The developed isotherm equation has been used successfully by us to study the nature of surface topography of a number of carbonaceous adsorbents.

show abstract

Adsorption of hydrocarbons on carbon molecular sieve. Application of volume filling theory

Cited by 16 publications

References 3 publications

Calculation methods for multicomponent adsorption equilibria

Calculation methods for multicomponent adsorption equilibria

Testing isotherm models and recovering empirical relationships for adsorption in microporous carbons using virtual carbon models and grand canonical Monte Carlo simulations

A New Molecular Probe Method To Study Surface Topography of Carbonaceous Solid Surfaces

Contact Info

Product

Resources

About