Kinetic Analysis of the Adsorption of Polar and Nonpolar Molecules onto Ordered Mesoporous Silica Using the Pressure-feedback Method

摘要

The rate constants for the adsorption of water and nitrogen onto ordered mesoporous silica SBA-15 were determined at 298 and 77K, respectively, using the novel pressure-feedback method (PFM) that measures the rate of adsorption directly. The rate constant for the adsorption of water is smaller than that of nitrogen, even though the adsorption of water was measured at a higher temperature (298 K) than that of nitrogen (77 K).