TY - JOUR
T1 - Development of “salt in porous matrix” composites based on LiCl for sorption thermal energy storage
AU - Frazzica, A.
AU - Brancato, V.
AU - Caprì, A.
AU - Cannilla, C.
AU - Gordeeva, L. G.
AU - Aristov, Y. I.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - In this study, the development and characterization of composite sorbents based on commercial mesoporous silica gels and LiCl for seasonal thermal energy storage (STES) applications is described. The reported activity aims at validating the operation of sorption STES in various cold climatic zones in Europe. Accordingly, the reference boundary conditions were identified by means of a climatic analysis in two climatic zones, namely, Central and Northern Europe. The acquired mesoporous silica gels were characterized, to evaluate the textural properties, i.e. specific pore volume and pore size, needed to define the optimal salt solution compositions to maximize the amount of salt embedded. The synthesized samples were firstly investigated using scanning electron microscopy and nitrogen physisorption that demonstrate the presence of a small quantity of salt over the external surface rather than inside the pores. A hydrothermal treatment, based on slow adsorption followed by a slow desorption step, was defined to solve this issue. Finally, starting from the measured equilibrium isobars, the expected STES density at material level was evaluated, obtaining values as high as 1080 J/g under cold Northern European climatic condition, corresponding to 650 MJ/m3.
AB - In this study, the development and characterization of composite sorbents based on commercial mesoporous silica gels and LiCl for seasonal thermal energy storage (STES) applications is described. The reported activity aims at validating the operation of sorption STES in various cold climatic zones in Europe. Accordingly, the reference boundary conditions were identified by means of a climatic analysis in two climatic zones, namely, Central and Northern Europe. The acquired mesoporous silica gels were characterized, to evaluate the textural properties, i.e. specific pore volume and pore size, needed to define the optimal salt solution compositions to maximize the amount of salt embedded. The synthesized samples were firstly investigated using scanning electron microscopy and nitrogen physisorption that demonstrate the presence of a small quantity of salt over the external surface rather than inside the pores. A hydrothermal treatment, based on slow adsorption followed by a slow desorption step, was defined to solve this issue. Finally, starting from the measured equilibrium isobars, the expected STES density at material level was evaluated, obtaining values as high as 1080 J/g under cold Northern European climatic condition, corresponding to 650 MJ/m3.
KW - Adsorption
KW - Composite sorbent
KW - Solar energy
KW - Thermal energy storage
KW - DENSITY
KW - WATER-ADSORPTION
KW - SORBENTS
KW - HEAT TRANSFORMATION
KW - TECHNOECONOMIC ANALYSIS
KW - OF-THE-ART
UR - http://www.scopus.com/inward/record.url?scp=85087996661&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2020.118338
DO - 10.1016/j.energy.2020.118338
M3 - Article
AN - SCOPUS:85087996661
VL - 208
JO - Energy
JF - Energy
SN - 0360-5442
M1 - 118338
ER -