Water sorption and heat storage in CaCl2 impregnated aluminium fumarate MOFs

Composite materials based on aluminium fumarate (AF) and CaCl2 have been developed for the storage of energy from renewable waste sources. Salt-Porous Matrix (CSPM) was synthesized by impregnating MOF host matrix with various relative salt contents (25–60 wt%). The resulting CSPMs were fully characterized X-ray diffraction, N2 H2O sorption isotherms at −196 25 °C, respectively, scanning electron microscopy thermal analysis. high surface area AF (959 m2 g−1) drastically decreases upon addition salt, to about 50 g−1. heat performance composites found depend added amount matrix, higher amounts leading better performance. maximum water capacity 0.68 kgH2O kg−1, coupled a (1840 kJ kg−1), makes these interesting when used rehydration level not exceeding CaCl2.4H2O avoid any deliquescence washing out salt. A kinetic study hydration demonstrated that deposition increases rate in comparison matrix. Moreover, impact activation dehydration also determined applying integral isoconversional methods.