Thermochemical characterizations of high-stable activated alumina/LiCl composites with multistage sorption process for thermal storage

Performance characterizations and thermodynamic analysis of magnesium sulfate-impregnated zeolite 13X and activated alumina composite sorbents for thermal energy storage

“…The pore sizes of zeolite 13X [17] and activated alumina [35] are around 0.8-0.9 nm and 1.7-31 nm in diameter, respectively. In accord with Reference [14], the pore size significantly affects the sorbent characteristics.…”

“…Activated alumina is a promising host matrix adsorbent for low-temperature TES because of its relatively high thermal conductivity and material strength. The LiCl-impregnated activated alumina has the predicted energy storage density of 318 kWh m −3 at 120°C charging temperature [35]. An open sorption TES system with the activated alumina/LiCl composite sorbent realizes the energy storage density of 191 kWh m −3 for space heating [36].…”

Synthesis of Mesoporous γ-Alumina Support for Water Composite Sorbents for Low Temperature Sorption Heat Storage

“…A direct comparison of the energy storage density of these composites with other alumina-containing composites was difficult, because it strongly depends on the boundary conditions. The value of energy storage density of the composite with LiCl (14.7 wt.%) and activated alumina prepared by wet impregnation equalled 1.14 GJ/m 3 , considering a desorption temperature of 120 • C, sorption temperature of 20 • C, and 80% relative humidity [11]. This composite was also tested in the open sorption TES system for space heating at a desorption temperature of 110 • C and reached 0.69 GJ/m 3 [22].…”

“…Fewer TCES studies have been carried out on the development of the active porous support, which can be involved in the adsorption process to further improve the storage performance in the context of increased sorption capacity by adjusting the chemical composition of the support and creating additional adsorption sites by using different synthesis routes [5][6][7][8]. Porous supports for TCM composites found in the literature are mainly commercial materials such as Zeolites [9], silica gels [10], activated alumina [11], and vermiculite [12], while recently, novel supports such as MOFs [13], polymeric foam [14], alginate [15], and porous carbon structures [16][17][18] have been used.…”

“…To date, TCM composite sorbents based on mesoporous alumina (Al 2 O 3 ) [20,21] or activated alumina [11,[22][23][24] have been prepared from commercially available aluminas and combined with the following salt hydrates: MgSO 4 , LiCl, and CaCl 2 . These alumina composites have been investigated for thermochemical heat storage at low temperature (<100 • C).…”