Adsorption and desorption kinetics for hydrophilic and hydrophobic vapors on activated carbon

A.J. Fletcher, Y. Yuzak, K.M. Thomas

Research output: Contribution to journalArticle

106 Citations (Scopus)

Abstract

Adsorption dynamics are of fundamental importance in applications of adsorbents in real situations. The adsorption/desorption characteristics of a series of adsorbates, with varying hydrophilic/hydrophobic and structural characteristics, for activated carbon BAX950, were investigated for temperatures in the range 288-323 K. These data provide a comprehensive kinetic study of adsorption/desorption for an activated carbon. The results are discussed in relation to the adsorbent pore structure and functional group concentration, adsorptive structure and adsorption mechanism. The study provides evidence for a compensation effect where activation energy and ln(pre-exponential factor) parameters obtained from the Arrhenius equation exhibit a linear correlation.
LanguageEnglish
Pages989-1004
Number of pages15
JournalCarbon
Volume44
Issue number5
DOIs
Publication statusPublished - Apr 2006

Fingerprint

Activated carbon
Desorption
Vapors
Adsorption
Kinetics
Adsorbents
Adsorbates
Pore structure
Functional groups
Activation energy
Temperature

Keywords

  • activated carbon
  • adsorption
  • activation energy
  • diffusion
  • porosity

Cite this

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Adsorption and desorption kinetics for hydrophilic and hydrophobic vapors on activated carbon. / Fletcher, A.J.; Yuzak, Y.; Thomas, K.M.

In: Carbon, Vol. 44, No. 5, 04.2006, p. 989-1004.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Adsorption and desorption kinetics for hydrophilic and hydrophobic vapors on activated carbon

AU - Fletcher, A.J.

AU - Yuzak, Y.

AU - Thomas, K.M.

PY - 2006/4

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AB - Adsorption dynamics are of fundamental importance in applications of adsorbents in real situations. The adsorption/desorption characteristics of a series of adsorbates, with varying hydrophilic/hydrophobic and structural characteristics, for activated carbon BAX950, were investigated for temperatures in the range 288-323 K. These data provide a comprehensive kinetic study of adsorption/desorption for an activated carbon. The results are discussed in relation to the adsorbent pore structure and functional group concentration, adsorptive structure and adsorption mechanism. The study provides evidence for a compensation effect where activation energy and ln(pre-exponential factor) parameters obtained from the Arrhenius equation exhibit a linear correlation.

KW - activated carbon

KW - adsorption

KW - activation energy

KW - diffusion

KW - porosity

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