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

doi:10.1177/026361749501200305

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

Chemistry

Research output: Contribution to journal › Article › peer-review

9 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 language	English
Pages (from-to)	211-219
Number of pages	9
Journal	Adsorption Science and Technology
Volume	13
Issue number	3
DOIs	https://doi.org/10.1177/026361749501200305
Publication status	Published - 1995

ASJC Scopus subject areas

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

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AU - Ahmed, A. I.

AU - El-Shafey, E. I.

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N2 - 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.

AB - 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.

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

Abstract

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