Compared to other high-performing materials, such as 5A, SAPO-34, Li/Na-ETS-10, and ITQ-55, under similar conditions, Li-2-SAPO-RHO achieved the longest separation interval and the shortest co-adsorption retention time. These results highlight its superior efficiency for C2H4/C2H6 separation (figs. S37 and S38). Furthermore, no decrease in breakthrough times for C2H6 or C2H4 was observed over five consecutive cycles, confirming the material's excellent stability and recyclability (fig. ).