Changes in the Adsorption Properties of Activated Carbon due to Partial Oxidation of the Surface

A. M. Youssef, A. A. El-Khouly*, A. I. Ahmed, E. I. El-Shafey

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The textural properties (surface area and porosity) of activated carbons change upon treatment with oxidizing solutions. The extent of this change is related to the strength of the oxidizing agent. Oxidation also changes the chemistry of the surface by forming carbon-oxygen groups which are the sites upon which the initial adsorption of water vapour takes place. The adsorption of water vapour at 300-320 K is mainly physical and the isosteric heat of adsorption decreases continuously as the surface coverage increases. The entropy of adsorption of water vapour on untreated and oxidized carbons, at different adsorption temperatures, has been calculated.

Original languageEnglish
Pages (from-to)211-219
Number of pages9
JournalAdsorption Science and Technology
Volume13
Issue number3
DOIs
Publication statusPublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Surfaces and Interfaces

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