Despite these advancements, achieving efficient C2H4/C2H6 separation using a single strategy remains highly challenging. Among zeolitic materials, RHO zeolite stands out for its exceptional framework flexibility . Its idealized framework (space group: Im3 ̅ m) comprises double 8MRs (d8rs) and lta cages (fig. ) containing single 6-membered rings (s6rs). Each lta cage connects to six d8rs, and each d8r links two lta cages, forming an intercage pathway, with cations positioned at d8rs. To access the lta cages, gaseous molecules must displace these cations, resulting in a "trapdoor" effect.