Surface heterogeneity of modified active carbons

Tsutsumi, Kazuo; Matsushima, Y.; Matsumoto, Atsushi

doi:10.1021/la00034a028

Cited by 15 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This effect is due to both the texture of the surface, i.e., the pore size and the pore size distribution, and the energetical heterogeneity of the surface, i.e., the polarity. A quintessence of the correlations documented in the literature (Bikerman, 1958;Clint et al, 1969;Findenegg and Everett, 1969;Kazmierczak et al, 1991;Matayo and Wightman, 1973;Melkus et al, 1987;Messow et al, 1990;Tsutsumi et al, 1993;Widyani and Wightman, 1982), supplemented by our own results, can be summarized as follows:…”

Section: Adsorbent-specific Parameterssupporting

confidence: 57%

Development of a Universal Group Contribution Model for Single-Component and Multicomponent Adsorption of Liquids on Various Adsorbents (UGCMA)

Friese

Ulbig

Schulz

1996

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

A new approach to the complex topic of liquid-phase adsorption onto a solid surface is presented in this paper using group contribution models, as they are already successfully applied to the VLE and LLE. Not only are the interactions between the groups of the liquid components in the surface phase, which differ with regard to the bulk phase, taken into consideration but also the adsorption-specific interactions with the solid surface are treated now in terms of group contributions. The interaction parameters have to be fitted to experimental surface-excess data as well as to those of heats of immersion. Once well-fitted parameters are finally available, heats of immersion, surface-phase activity coefficients, and phase equilibrium can be calculated. The introduction of special parameters, which take account of the geometrical and energetical heterogeneity of the surface, offers the possibility of applying the developed model to various adsorbents.

show abstract

Section: Adsorbent-specific Parameterssupporting

confidence: 57%

Development of a Universal Group Contribution Model for Single-Component and Multicomponent Adsorption of Liquids on Various Adsorbents (UGCMA)

Friese

Ulbig

Schulz

1996

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…In the case of vapor adsorption on microporous carbon, the higher q d at the initial stage are observed regardless of the polarity of adsorbates. , Wang et al suggested that the high heat evolution with SO 2 adsorption at this stage is ascribed to the strong adsorption on the surface functional groups and to the additional interaction of the SO 2 dipole with the surface functional groups through the surface electric field. However, n -hexane is nonpolar so that the dispersion interaction would play a dominant role in the adsorption rather than the polar ones.…”

Section: Resultsmentioning

confidence: 99%

Adsorption Behavior of Hydrocarbons on Slit-Shaped Micropores

1997

View full text Add to dashboard Cite

Adsorption behavior of the hydrocarbons n-hexane, n-octane, cyclohexane, neopentane, and benzene on microporous activated carbon fibers (ACFs) was studied by use of molecular adsorption and adsorption calorimetry. The calorimetric aspects were discussed in connection with pore characteristics determined by nitrogen adsorption. The differential heats of adsorption of hydrocarbon, as well as the integral heats on ACFs of narrower pore widths, tended to become higher than those of wider pore widths, which is ascribed to micropore filling. These experimental results were also compared with the theoretical profile of the intermolecular interaction between adsorbates and adsorbents.

show abstract

“…However, that 154 OSAMU SHINOHARA et al for AC-Red was larger than that of AC because it was strongly activated. Tsutsumi et al reported that hydrogen reduction does not change the pore structure of the activated carbon and that the ultramicropore distribution might also be influenced by oxidation [11). The pore volume of the activated carbon is only slightly changed by oxidation, while it increased by reduction.…”

Section: Resultsmentioning

confidence: 99%

Relationship between surface‐modified activated carbons and volatile chlorinated hydrocarbons

Shinohara

Kawasaki

Nakamura

et al. 2000

Toxicological & Environmental Chemistry

View full text Add to dashboard Cite

The interactions between surface-modified activated carbons and trichloroethylene (TCE) or tetrachloroethylene (PCE) were estimated based on the adsorption isotherms and constants of the Freundlich and Langmuir equations. This result indicated that PCE strongly interacts with the activated carbon surface compared to TCE, because PCE is a more hydrophobic compound than TCE. The adsorption of TCE onto the activated carbon was effected to the presence of water, while that for PCE was not. The removal of TCE has to use for more hydrophobic activated carbon, that is, the activated carbon treated with hydrogen gas (AC-Red). On the other hand, the removal of PCE in water could be removed by the untreated activated carbon (AC).

show abstract

Surface heterogeneity of modified active carbons

Cited by 15 publications

References 0 publications

Development of a Universal Group Contribution Model for Single-Component and Multicomponent Adsorption of Liquids on Various Adsorbents (UGCMA)

Development of a Universal Group Contribution Model for Single-Component and Multicomponent Adsorption of Liquids on Various Adsorbents (UGCMA)

Adsorption Behavior of Hydrocarbons on Slit-Shaped Micropores

Relationship between surface‐modified activated carbons and volatile chlorinated hydrocarbons

Contact Info

Product

Resources

About