MICROPOROUS ADSORBENTS FOR SOLAR ENERGY STORAGE

摘要

The storage of solar heat is still a technological challenge that hinders its large-scale utilization. Microporous adsorbents are currently the most promising candidates for storage applications, mainly because of the possibility for a precise tuning of their atomic structure. This paper focuses on the latest approaches in synthesis and structure characterization of microporous aluminophosphates for sorption-based storage applications. Our study of reversible water sorption revealed high water sorption capacity and hydrothermal stability of aluminophosphate material with small pores at operating temperatures (40-140 °C) and operating pressure (56 mbar) for more than 50 cycles. The material's performance, combining the water uptake mechanism, heat of adsorption and hydrothermal stability, is so far the most promising among the aluminophosphates for water-sorption-based heat storage applications and for heat transformation in heat pumping systems.