Understanding N<sub>2</sub> Kinetics on LiLSX Commercial\nBeads: An Experimental and Modeling Approach for Novel Material Characterization

The measurement of accurate nitrogen adsorption kinetics\nin state-of-the-art\nLiLSX beads is essential for the optimization of vacuum swing processes\nfor the production of oxygen. A novel methodology is presented in\norder to establish experimentally the presence of combined heat and\nmass transfer phenomena. The very rapid uptake kinetics are measured\nusing the adsorption differential volumetric apparatus and interpreted\nusing a nonisothermal model. The novel methodology includes the determination\nof all the physical parameters of the model from the simultaneous\nregression of all experimental runs at different pressure levels.\nThe approach has been demonstrated on two Zeochem binderless LiLSX\nbeaded samples, for which traditional methods proved inconclusive,\nallowing to determine the relative kinetic performance.