Difference between revisions of "Cohan Mechanism"
From Soft-Matter
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For a given pore radius r, adsorption with radial capillary condensation occurs at | For a given pore radius r, adsorption with radial capillary condensation occurs at | ||
| + | <math>p_{adsorption} = p_0 exp (- \Sigma * v_m / rRT) </math> | ||
| − | [[Image:Cohan_Mechanism.jpg|thumb|300px]] | + | <math>\Delta \mu_{desorption} = 2 \gamma / n R</math> |
| + | [[Image:Cohan_Mechanism.jpg|thumb|300px| Radial filling of pores during adsorption (left) and desorption (right) as explained by the Cohan Mehanism]] | ||
Revision as of 18:44, 5 October 2009
The Cohan mechanism, also known as the Cohan theory of capillary condensation, describes the condensation of liquid in a cylindrical pore. The Cohan mechanism states that on adsorption, pores do not fill vertically, but instead fill radially. This it thought to explain the hysteretic behavior seen in the adsorption-desorption process for porous materials.
For a given pore radius r, adsorption with radial capillary condensation occurs at
<math>p_{adsorption} = p_0 exp (- \Sigma * v_m / rRT) </math>
<math>\Delta \mu_{desorption} = 2 \gamma / n R</math>
