469778 High-Purity Oxygen Production Using Silver Exchanged Titanosilicates (Ag-ETS-10)
In this work, adsorption isotherms of N2, O2, and Ar on Ag-ETS-10 extrudates have been measured utilizing a volumetric apparatus and described using a Langmuir isotherm. In order to validate the large-scale performance of the adsorbent, single, binary, and ternary breakthrough profiles were obtained using a laboratory scale dynamic column breakthrough apparatus. These experiments have been described by discretising mass and energy balances using the finite volume technique. The model could predict the experimental profiles to a high level of precision. Various Pressure/Vacuum swing adsorption (P/VSA) cycle configurations including simple Skarstrom cycle and more complicated VSA cycles were simulated using mathematical models to maximize O2 purity and recovery. Both 95%/5% O2/Ar and dry air feed were considered in the simulations and a rigorous multi-objective optimization was conducted to maximize O2 purity and recovery which indicated the ability of Ag-ETS-10 to separate ultra-high purity O2 with good recovery. Effect of different operating parameters on O2 purity and recovery and rigorous multi-objective optimization results to maximize oxygen productivity and minimize energy consumption of the P/VSA cycles (while meeting the purity-recovery constraint) were studied. The comparison of the simulation results with single-column experiments will be presented.