To confirm the purity of C2H4 recovered from the seven-component breakthrough experiment, dynamic desorption was performed. Vacuum purging under ambient conditions for 5 minutes successfully desorbed high-purity C2H4 (> 99.9%, 238.6 mmol/L) (Fig. ). These results indicate that Li-2-SAPO-RHO is a highly effective material for C2H4 separation from refinery dry gas mixtures. Its superior selectivity, stability, and recyclability make it a promising candidate for industrial-scale gas separation applications.