Adsorption of carbon dioxide on montmorillonites of different ion exchange forms
Autor: | S. Z. Muminov, A. A. Pribylov, L. G. Shekhovtsova, I. A. Kalinnikova |
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Rok vydání: | 2010 |
Předmět: | |
Zdroj: | Colloid Journal. 72:417-422 |
ISSN: | 1608-3067 1061-933X |
Popis: | The adsorption isotherms of carbon dioxide are measured at 303, 343, 373, and 400 K and pressure P ranged from 0.1 to 6 MPa for three montmorillonites, i.e., the initial sample in the sodium form and two ion exchanged samples in pyridinium and polyhydroxyaluminum forms. It is shown that the linear character of the isosteres of CO2 adsorption is retained for polyhydroxyaluminum and sodium montmorillonites, a deviation of the adsorption isosteres from linearity is observed for pyridinium montmorillonite at high temperatures (373–400 K) and high surface fillings. The differential excess entropies of CO2 adsorbate are calculated for different fillings of montmorillonites. Using various approaches, the adsorption volumes for the systems studied are calculated. |
Databáze: | OpenAIRE |
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