Adsorption
isotherms are reported for pure water vapor on zeolite
13X (also called zeolite NaX) pellets. Data were obtained using a
gravimetric method over a temperature range of 25 to 100 °C and
a pressure range of 0.006 to 25 kPa. These pure-component equilibria
are fit with the Sips, Toth, and multisite Langmuir models, all modified
with the Aranovich–Donohue (A–D) model. The A–D
Sips isotherm is recommended for modeling water adsorption on zeolite
13X because it provides the best agreement with the measured isotherm
data.