Abstract
Meso-porous silica is one of the promising adsorbents that will enhance performances of energy-saving technologies, such as adsorption cooling, adsorption heat pump and adsorption thermal storage. Adsorption equilibrium and adsorptin kinetics are essential information to design as well as to predict the performance of the systems. The adsorption isotherm equation for meso-porous silica is, however, difficult to model accurately because of a large jump of adsorption uptake at a certain relative pressure and strong hysteresis. The study measured adsorption and desorption isotherms at 30℃, 50℃, and 70℃. The isotherms are modeled using a Henry and Sips type equation. The average errors between the measurement and the model are 4.10〜6.79 % for adsorption and 3.27〜8.70% for desorption.
