On the application of the potential theory to the adsorption of carbon dioxide in microporous polymer carbons

✍ Scribed by N.G. Dovaston; B. McEnaney; C.J. Weedon

• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 724 KB
• Volume: 10
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(72)90326-0

✦ Synopsis

Adsorption isotherms in the range 195-298K on carbons prepared from cellulose and cellulose triacetate are interpreted in terms of the developments of the Potential theory by Dubinin and Radushkevich. It is shown that the criterion proposed by Dubinin for determining the lower limit of temperature-independence

of the characteristic curve, i.e. AS < 0, is consistent with the postulates of the Potential theory when T < Tc, but is not generally valid. Application of this criterion to the present study shows that the Dubinin-Radushkevich equation may be applied at p/p0 > ca. 10m3. The existence of this limit is attributed to the limitations of the Potential theory when applied to adsorption at very low pressures. In particular, it is suggested that there is a significant contribution from configurational terms to AS at low pressures.