Patent ID: 8333079
Filing Date: 2012-12-18
Classification: B01J,F25B

Abstract:
1. In a method for adsorbing and desorbing an adsorbate on an adsorbent at a temperature at which water is desorbed from the adsorbent, which comprises heating the adsorbent with waste heat from at least one of an automotive engine, a gas engine, a gas turbine, and a fuel cell, the improvement wherein: the adsorbent comprises a zeolite containing aluminum, silicon and phosphorus in the framework structure, and the adsorbent has a region in which an adsorption amount difference as determined with the following equation is 0.15 g/g or larger in the range in which the relative vapor pressure φ2b when water is adsorbed thereon is from 0.115 to 0.18 and the relative vapor pressure φ1b when water is desorbed therefrom is from 0.1 to 0.14; wherein the adsorption amount difference is Q2−Q1, wherein Q1 is the adsorption amount of water at φ1b as determined from a desorption isotherm of water obtained at a temperature (T