A macrothermodynamic approach to the limit of reversible capillary condensation
Trens, P; Tanchoux, N; Galarneau, A; Brunel, D; Fubini, B; Garrone, E; Fajula, F; Di Renzo, F
| HERO ID | 1071212 |
|---|---|
| In Press | No |
| Year | 2005 |
| Title | A macrothermodynamic approach to the limit of reversible capillary condensation |
| Authors | Trens, P; Tanchoux, N; Galarneau, A; Brunel, D; Fubini, B; Garrone, E; Fajula, F; Di Renzo, F |
| Journal | Langmuir |
| Volume | 21 |
| Issue | 18 |
| Page Numbers | 8560-8564 |
| Abstract | The threshold of reversible capillary condensation is a well-defined thermodynamic property, as evidenced by corresponding states treatment of literature and experimental data on the lowest closure point of the hysteresis loop in capillary condensation-evaporation cycles for several adsorbates. The nonhysteretical filling of small mesopores presents the properties of a first-order phase transition, confirming that the limit of condensation reversibility does not coincide with the pore critical point. The enthalpy of reversible capillary condensation can be calculated by a Clausius-Clapeyron approach and is consistently larger than the condensation heat in unconfined conditions. Calorimetric data on the capillary condensation of tert-butyl alcohol in MCM-41 silica confirm a 20% increase of condensation heat in small mesopores. This enthalpic advantage makes easier the overcoming of the adhesion forces by the capillary forces and justifies the disappearing of the hysteresis loop. |
| Doi | 10.1021/la0507838 |
| Pmid | 16114972 |
| Wosid | WOS:000231550000070 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Is Qa | No |