The effect of the ion exchange in the adsorption of natural mordenite was studied for CO, CH4, and N2 gases between the temperatures of 303 K and 363 K. The divalent Ca++ cations and monovalent Na+ cations were partially exchanged in this study. Henry’s law constant, a measure of adsorption capacity, was determined using the gas chromatographic method, as well as the separation factors for CO/N2, CO/CH4, and N2/CH4 binary system.
The adsorption capacity of natural mordenite for CO and CH4 increased with increasing divalent cation completion and decreased with increasing monovalent cations in their framework. No significant change was observed for N2.
Separation was promising for CO/N2 and CO/CH4 systems, but not for N2/CH4 system for the mordenite studied.
