Characterization of active carbons by combined preadsorption and immersion techniques

Stoeckli, Fritz; Huguenin, D.; Rebstein, P.

doi:10.1039/ft9918701233

Cited by 21 publications

(15 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is in contrast to the results of other authors [2,3,4,17]. The reason must be found in the different way the n-nonane preadsorption was applied.…”

Section: Discussioncontrasting

confidence: 55%

See 1 more Smart Citation

Temperature Programmed Desorption of n-nonane; the method to measure the micropore size distribution

Mittelmeijer‐Hazeleger

Linden

Bliek

1995

J Porous Mater

View full text Add to dashboard Cite

Temperature Programmed Desorption on n-Nonane: The method to measure the micropore size distribution Mittelmeijer-Hazeleger, M.C.; van der Linden, B.; Bliek, A. Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Download date: 11 May 2018Journal of Porous Materials, 2, 25-34 (1995 Department of Chemical Engineering, University of AmsterdamAbstract. TPD of n-nonane gives a micropore size distribution of micropores in the range of .4 to 2 nm. This method is independent of the shape of the pore entrances. It is proven that n-nonane fills these micropores. The Temperature Programmed Desorption patterns of five activated microporous carbons and three zeolites will be shown.The difference in adsorption behaviour of CO2 and SF6 at 273 K and of CH4 at 315 K on the carbons is explained with the aid of the obtained micropore size distributions.

show abstract

“…This is in contrast to the results of other authors [2,3,4,17]. The reason must be found in the different way the n-nonane preadsorption was applied.…”

Section: Discussioncontrasting

confidence: 55%

“…Also discussions are reported in the literature about the size of the micropores that are filled or blocked by n-nonane [3,4]. Because of the importance of micropores in many processes like separation, adsorption and so, since long scientists are trying to determine the micropore size distribution.…”

Section: Introductionmentioning

confidence: 99%

Temperature Programmed Desorption of n-nonane; the method to measure the micropore size distribution

Mittelmeijer‐Hazeleger

Linden

Bliek

1995

J Porous Mater

View full text Add to dashboard Cite

show abstract

“…However, the model may be refined by considering a variable density and/or a correlation between the adsorption centres. This requires further information on the carbon and the use of techniques such as immersion calorimetry combined with the preadsorption of an nalkane [32]. The model of ideally slit-shaped micropores and the exact location of the oxygen atoms may be questioned and must be examined again, in particular in the light of new structural models for the micropores, as put forward recently by Py et al [33].…”

Section: Discussionmentioning

confidence: 99%

“…For carbons DCG-5-ox and CMS-ox, this amounts to, respectively, 2.59 and 6.34 atoms per nm 2 . However, variations of the surface density cannot be ruled out, and in the case of carbon DCG-5-ox an even better agreement can be obtained for the initial part of the isotherm if one assumes a density of 2. immersion into water, following the preadsorption of increasing amounts of n-nonane or n-undecane [32] (For a uniform density, the enthalpy shows a linear decrease with preadsorption). However, the origin of the change in density cannot be explained at this stage.…”

Section: Comparison Of Simulated and Experimental Isothermsmentioning

confidence: 99%

Modelling of water adsorption by activated carbons: effects of microporous structure and oxygen content

Slasli

Jorge

Stoeckli

et al. 2004

Carbon

View full text Add to dashboard Cite

The present paper examines the adsorption of water by microporous carbons containing various amounts of surface oxygen and a smaller proportion of basic centres. The modelling of water adsorption for 293 and 310 K, using variable pore size distributions (PSD), confirms that the overall type IV isotherm is the sum of a type I isotherm associated with the specific interactions, and a type V isotherm reflecting the non-specific interactions. The principle of temperature invariance is followed by these isotherms, which indicates that modelling leads to the Dubinin-Astakhov equation.The present approach allows the prediction of water adsorption near room temperature, on the basis of the PSD and the density of oxygen present on the surface area of the micropores. It is assumed, to a first and good approximation, that the pores are slitshaped and the oxygen distribution is random.

show abstract

“…As shown by Lavanchy et al (1996), the binary adsorption of vapours by microporous solids can be described by a combination of the theories of Myers and Prausnitz (Myers and Prausnitz 1965;Valenzuela and Myers 1989) and of Dubinin (Dubinin 1989;Stoeckli 1993Stoeckli , 1995. The new approach, called the MPD theory, provides a useful basis for the calculation of the adsorption under static and dynamic conditions .…”

Section: Introductionmentioning

confidence: 99%

The Non-Ideality of the System Benzene + 1,2-Dichloroethane Adsorbed in Microporous Carbons at 293 K

Stoeckli

Couderc

Lavanchy

et al. 2000

Adsorption Science & Technology

View full text Add to dashboard Cite

In the case of simple vapour mixtures adsorbed by active carbons, the activity coefficients seem to depend essentially on the composition of the adsorbed phase, rather than on the degree of micropore filling. Consequently, the liquid-solid adsorption equilibrium of benzene + 1,2-dichloroethane mixtures has been investigated at 293 K, using a typical active carbon and following earlier work for adsorption from the vapour phase. This system has the advantage that the mixture is ideal in the liquid state, which provides a convenient reference for the study of the adsorbed phase. The activity coefficients, as well as the excess enthalpy of immersion of the carbon into the liquid mixtures, provide information on the modifications in the adsorbed state with respect to the ideal mixture. It is also shown that the introduction of the activity coefficients derived from the solidliquid equilibrium increases considerably the accuracy of the MyersPrausnitz-Dubinin model for the adsorption of the vapour mixtures.

show abstract

Characterization of active carbons by combined preadsorption and immersion techniques

Cited by 21 publications

References 10 publications

Temperature Programmed Desorption of n-nonane; the method to measure the micropore size distribution

Temperature Programmed Desorption of n-nonane; the method to measure the micropore size distribution

Modelling of water adsorption by activated carbons: effects of microporous structure and oxygen content

The Non-Ideality of the System Benzene + 1,2-Dichloroethane Adsorbed in Microporous Carbons at 293 K

Contact Info

Product

Resources

About