Composites lithium halides in silica gel pores : methanol sorption equilibrium

This paper presents the methanol sorption equilibrium and phase composition of two composite sorbents "LiCl and LiBr confined to mesopores of silica gel". Chemical phase analysis of the samples was performed by the differential dissolution method. Phase transformation of the composites during methanol sorption was characterized in situ by X-ray diffraction analysis. The isobars of methanol sorption on the composites were measured in the temperature range T = 293-423 K and for methanol pressure P-MeOH = 21-300 mbar using a thermo-gravimetric technique. It was found that the two composites showed an outstanding sorption capacity w(max) = 0.8 g/g and an energy storage ability E-max = 1.0 kJ/g, which could be attractive for development of efficient adsorptive cooling/heating and energy storage systems driven by a low temperature heat source.