Why molecular sieve at room temperature does not produce water desorption

ethanol dehydration molecular sieve adsorption of water is adsorbed by the van der Waals force, from the microscopic point of view internal pore molecular sieve to reach static equilibrium, the water molecules are polar molecules break down into hydrogen ions and hydroxide ions. In the adsorption process of water molecules in the double glazing molecular sieve with water decomposition of hydrogen ions and hydroxide ions again to reach static equilibrium, pull off the oxygen-hydrogen releases energy (temperature rise phenomenon). The whole process is the physical reaction. Thus Adsorbent Molecular Sieve Kdhf-03 at room temperature does not produce water desorption.