CO2 and N2 adsorption on the acid treated natural and synthetic zeolites at 5∘C and 25∘C was studied. The system heterogeneity was higher for CO2 than N2 adsorption and decreased with acid treatment.
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Ertan, A., Çakicioğlu-ÖZKAN, F. CO2 and N2 Adsorption on the Acid (HCl, HNO3, H2SO4 and H3PO4) Treated Zeolites. Adsorption 11 (Suppl 1), 151–156 (2005). https://doi.org/10.1007/s10450-005-5914-7