✦ LIBER ✦

Evolution of micropore structure of activated charcoal cloth

✍ Scribed by P.J.M. Carrott; J.J. Freeman

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 846 KB
Volume: 29
Category: Article
ISSN: 0008-6223
DOI: 10.1016/0008-6223(91)90113-w

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✦ Synopsis

A series of microporous charcoal cloths of burn-offs between 20 and 92% have been prepared and studied by means of nitrogen, isobutene, methanol, and water adsorption isotherm measurements. The results indicate that at a level of burn-off of about 50%, the polarity of the surface fails to a minimum while the micropore volume, when expressed in terms of the same initial weight of carbon, reaches a maximum. At higher levels of burn-off both pore widening and pore narrowing occur. In addition, significant shrinkage of the carbon structure occurs at all stages of burn-off. The results are discussed in terms of a simple model, and it is concluded that densification of the carbon structure during activation exerts a significant influence on the evolution of the micropore structure.

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