Ein neuer Ansatz zur Charakterisierung der Flüssigphasenadsorption an Aktivkohlen

Treese, Julian; Pasel, Christoph; Luckas, Michael; Bathen, Dieter

doi:10.1002/cite.201400085

Cited by 5 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Treese et al [96] modeled the surface chemistry of activated carbons with 3 types of groups, namely aromatic surface groups, aliphatic polar surface groups formed by heteroatoms, and aliphatic non-polar carbon surface groups. The amount of surface groups was determined from the adsorption of probe molecules (of similar size to avoid sterical effects), which are assumed to adsorb preferentially to one of the three types of surface groups.…”

Section: Excess Isothermsmentioning

confidence: 99%

Characterization of Activated Carbon Adsorbents – State of the Art and Novel Approaches

et al. 2019

Self Cite

View full text Add to dashboard Cite

Activated carbons are widely used as commercial adsorbents. Thermal or chemical activation creates a pore system and functional groups on the inner surface which may significantly change adsorption properties. Therefore, in addition to knowledge of the structural properties, a sound understanding of surface chemistry is indispensable. This paper summarizes the state of art as well as new developments in both fields. Standardized methods for characterizing structural properties are volumetric measurements and mercury porosimetry. To get a more detailed insight into the region of micropores, a probe molecule method was developed. For characterization of surface chemistry, methods such as IR spectroscopy, temperature-programmed desorption, and Boehm titration are subject of research. Novel methods were developed such as measuring of excess isotherms and calorimetric measurement of heat of adsorption, which are presented and discussed in greater detail in this paper. As each single method can only provide limited information, a better description of surface chemistry requires combination and careful interpretation of complementary information from different methods. Property Standard Limitation Apparent density ASTM D 2854-09 Total ash content ASTM D 2866-11 Moisture ASTM D 2867-17 Ball-pan hardness ASTM D 3802-16 pH-value ASTM D 3838-05 Electrical conductivity ASTM D 1125-14 Water soluble components ASTM D 5029-98 Volatile matter content ASTM D 5832-98 Acid extractable content ASTM D 6385-99 Particle size distribution ASTM D 2862-16 granular activated carbon ASTM D 5158-98 powdered activated carbon Ignition temperature ASTM D 3466-06 granular activated carbon Dusting attrition ASTM D 5159-04 granular activated carbon www.ChemBioEngRev.de

show abstract

Section: Excess Isothermsmentioning

confidence: 99%

Characterization of Activated Carbon Adsorbents – State of the Art and Novel Approaches

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Effective toluene removal from aqueous solutions using fast pyrolysis-derived activated carbon from agricultural and forest residues: Isotherms and kinetics study

Molina

Park

et al. 2023

Heliyon

View full text Add to dashboard Cite

Ein neuer Ansatz zur Charakterisierung der Flüssigphasenadsorption an Aktivkohlen

Cited by 5 publications

References 14 publications

Characterization of Activated Carbon Adsorbents – State of the Art and Novel Approaches

Characterization of Activated Carbon Adsorbents – State of the Art and Novel Approaches

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

Effective toluene removal from aqueous solutions using fast pyrolysis-derived activated carbon from agricultural and forest residues: Isotherms and kinetics study

Contact Info

Product

Resources

About