Zeolites and superporous hydrogels-based hybrid composites as solid desiccants to capture water vapors from humid air

This work reports the synthesis and use of zeolites based super-porous hydrogel composites (SPHCs) as solid polymer desiccants to capture water vapors from moist air. The SPHCs were composed hydrogels (SPHs) acrylic acid methacrylamide (i.e. P(AA-co-MAM)-SPHs) matrix AQSOA type zeolites, i.e. AQSOA-Z01, AQSOA-Z02 AQSOA-Z05 reinforcing materials. Different structural morphological properties characterized using techniques like XRD, SEM, FTIR TGA-DTG. Desiccant P(AA-co-MAM)-SPH explored in terms adsorption isotherm kinetics. All exhibited type-III isotherm, suggesting vapors’ via capillary condensation mechanism correlated well with GAB FHH models. maximum capacity 0.72 gw/gads. However, after different increased 0.80, 0.84 0.91 gw/gads SPHC/AQSOA-Z01, SPHC/AQSOA-Z02 SPHC/AQSOA-Z05, respectively at 90% relative humidity 25 °C. Further, kinetics data linear driving force intraparticle diffusion models equilibrium was achieved much quicker 70% compared humidity. showed better re-use efficiency parental SPH, therefore, reinforcement improved P(AA-co-MAM)-SPH.