Adsorptive Removal of Alkoxyphenols from Ketones and Esters with Activated Carbon – Experiments and Modelling

Gräf, Theo; Pasel, Christoph; Bathen, Dieter

doi:10.1002/cite.201000086

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…According to our previous research 25–27, liquid‐phase adsorption on activated carbons is influenced mainly by two chemical characteristics of the adsorptives, i.e., polarity and aromaticity of the adsorptives. It was shown that nonpolar compounds adsorb better to the activated carbon surface than polar compounds.…”

Section: Theoretical Framework For Calculating Surface Groupsmentioning

confidence: 99%

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Chemical Surface Characterization of Activated Carbons by Adsorption Excess of Probe Molecules

et al. 2016

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Activated carbons are one of the most common industrial adsorbents in liquidphase applications. It is known that the surface groups of the activated carbon can have a significant influence on the adsorption process from the liquid phase. Therefore, it is desirable to measure surface groups on activated carbons. This opens up the possibility to use group-contribution methods to model and predict adsorption isotherms. An idea is presented to characterize the inner surface of activated carbons by three types of surface groups: aromatic, polar, and nonpolar surface groups. The amounts of these surface groups were calculated from excess adsorption isotherms of probe molecules on ten activated carbons. This lays the groundwork for further simulation studies of liquid-phase adsorption using group-contribution methods.

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Section: Theoretical Framework For Calculating Surface Groupsmentioning

confidence: 99%

“…In this paper, an idea is proposed on how to measure surface groups of activated carbons through excess isotherms. The research is based on our previous understanding of how liquid‐phase adsorption is influenced by the chemistry of the adsorptive and on how aromatic surfaces yield specific intermolecular interactions 22–28.…”

Section: Introductionmentioning

confidence: 99%

Chemical Surface Characterization of Activated Carbons by Adsorption Excess of Probe Molecules

et al. 2016

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Ein neuer Ansatz zur Charakterisierung der Flüssigphasenadsorption an Aktivkohlen

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Pasel

Luckas

et al. 2015

Chemie Ingenieur Technik

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Aktivkohlen sind industriell häufig eingesetzte Adsorbentien. Die Charakterisierung ihrer Oberflächeneigenschaften bereitet jedoch aufgrund der Vielzahl an Rohstoffen und Herstellungsvarianten Probleme. Hier wird eine Modellvorstellung zur Beschreibung der Oberfläche hergeleitet, die auf der Kenntnis der wesentlichen chemischen Wechselwirkungen auf Aktivkohleoberflächen basiert, die bereits erforscht wurden. An verschiedenen Aktivkohlen werden Adsorptionsisothermen ausgesuchter Probemoleküle vermessen und mit den Daten überprüft, inwiefern das Modell zur Bewertung der Oberflächenchemie von Aktivkohlen geeignet ist.

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Adsorption of aromatic trace compounds from organic solvents on activated carbons—experimental results and modeling of adsorption equilibria

et al. 2012

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Liquid phase adsorption is an important process for the removal of trace compounds from liquid matrices. Until today, research on liquid phase adsorption is less substantial than work on other thermal separation processes. The description of relevant mechanisms and interactions is difficult mainly because of lacking experimental data. This paper presents extensive isotherm measurements for the adsorption of organic trace compounds from organic solvents on activated carbons. A systematic variation of molecular structure of adsorptives and solvents enabled the identification of main structural factors dominating adsorption in these systems. The factors are polarity, extension and density of π electrons and sterical complexity. An analysis of the measured isotherms revealed incremental effects of functional groups and structural elements being characteristic for the adsorption capacities on activated carbons. Three consecutive empirical prediction models of adsorption equilibria are developed and compared. The empirical Freundlich equation appeared to be best suited for fitting the experimental data. The models apply an incremental concept permitting the calculation of adsorption isotherms on the basis of the structural increments of solvent and adsorptive molecules. The three models have a different extent of underlying data, a different number of parameters and a different range of application. The experimental data are predicted with satisfying accuracy for many engineering applications. The most sophisticated model has the most extensive range of application and manages on the smallest number of parameters.

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Adsorptive Removal of Alkoxyphenols from Ketones and Esters with Activated Carbon – Experiments and Modelling

Cited by 3 publications

References 10 publications

Chemical Surface Characterization of Activated Carbons by Adsorption Excess of Probe Molecules

Chemical Surface Characterization of Activated Carbons by Adsorption Excess of Probe Molecules

Ein neuer Ansatz zur Charakterisierung der Flüssigphasenadsorption an Aktivkohlen

Adsorption of aromatic trace compounds from organic solvents on activated carbons—experimental results and modeling of adsorption equilibria

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