Dynamic breakthrough simulations validated the separation performance of Li-2-SAPO-RHO using an equimolar C2H4/C2H6 mixture (50:50, v/v) (fig. ). Complete separation was achieved, with C2H6 eluting first, followed by C2H4 after a defined breakthrough interval (τbreak). During this interval, high-purity C2H6 (> 99.9%) was recovered, and the captured amount of C2H4 reached 1.5 mmol/g. The separation potential parameter (∆Qs), reflecting the performance of fixed-bed adsorbents for mixture separation, was calculated to benchmark Li-2-SAPO-RHO against other highperforming zeolites. The Li-2-SAPO-RHO also has the highest separation potential among all the comparation zeolites materials (fig. ). In addition, because of the outstanding C2H4/C2H6 selectivity and relatively high C2H4 uptake, Li-2-SAPO-RHO recovered up to 2997 mmol/L of high-purity C2H4 from the equimolar mixture, outperforming all tested materials (fig. and table ). These results establish Li-2-SAPO-RHO as a leading candidate for adsorptive C₂H₄/C₂H₆ separation, offering exceptional selectivity, high capacity, and energy-efficient regeneration.