Influence of Chemical Pretreatment on the Adsorption of N2 and O2 in Ca-Clinoptilolite

N2 and O2 adsorption isotherms in chemically modified clinoptilolite-Ca zeolites were experimentally estimated by inverse chromatography. Natural (CLINA) treated with HCl at different concentrations (H1-H4). The of on these was studied the temperature zone 398–498 K using gas This technique used a thermal-conductivity detector He as carrier gas, rate 30 mL min−1. Langmuir Henry equations to describe experimental results gases’ adsorption. To evaluate selectivity components atmospheric air, chemical activation zeolite has been carried out. are attractive because ability separate gases nanomaterials present under dynamic conditions. structural modifications crystalline phases out through X-ray diffraction, where average crystal size evaluated Scherrer equation, finding values 25.86 nm for CLINA 15.12 H3 zeolites. variation their composition energy-dispersive EDS, while texture properties 77 K. coefficients (α) pure form mixture (atmospheric air), highest H4 H3. interaction energies between porous structures from evolution isosteric enthalpies Clausius–Clapeyron equation.