Figure 4

Characterized enthalpies of adsorption.

(a) integral adsorption enthalpies and (b) adsorption enthalpies as function of vapor uptake, using Eqns (7) and (17), for 13X and MgY zeolites and MOF-801 with water pairs at 30 oC. Integral enthalpies are averaged over 31-32 wt.%, 35-36 wt.% and 19-20 wt.% vapor uptakes for 13X and MgY zeolites and MOF-801, respectively. Errors reported herein are 95% confidence interval estimated from calculated adsorption enthalpies from all measurements^29,30. Previous calorimetric study³³of 13X and isosteric enthalpy of MOF-801 from Fig 1(b) are also shown. (Latent heat of evaporation of water at 30 °C, h_fg = 2430 kJ/kg).