Hierarchically porous aluminosilicate with high adsorption capacity and fast desorption kinetics was synthesized via hydrothermal method. Samples under different pre-crystallization temperature were synthesized. It was revealed that the excellent performance of adsorbents was attributed to its unusual pore texture. The adsorbents were characterized by N2 physisorption

XRD

TEM

FT-IR and NMR. The water vapor adsorption-desorption isotherms were measured on a dynamic vapor sorption system (DVS). The results of characterization showed that the adsorbent framework consisted of ordered mesoporous with microporous-like pits. As the pre-crystallization temperature raised

the proportion of microporous-like pits increased and the deep dehumidification performance was improved as more Al substituted in the framework. However

the amount of ordered mesopore and total pore volume decreased

leading to lower saturated adsorption capacity and water-desorbed percent. The hierarchically porous aluminosilicate showed its advantages for rotary dehumidifiers with deep dehumidification performance (relative humidification

RH 15%

200 mg·g-1)

high saturated adsorption capacity (RH 40%

400 mg·g-1) and fast desorption kinetics under low desorption temperature (87℃).