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Clathrate hydrates, also known as gas hydrates, are a type of inclusion compound formed in highly developed nanoporous lattice spaces created by water molecules, where gas molecules such as CO₂, H₂, CH₄, and other low-molecular-weight liquid molecules are trapped. The nanoporous cage formed by water molecules serves as the “host”, while the trapped gas or low-molecular-weight liquid molecules such as tetrahydrofuran act as “guests”. Early on, clathrate hydrates drew attention as a potential replacement for conventional natural gas due to their natural gas hydrate form, which contains natural gases as guests and exists in permafrost or sea floors. Recently, based on the unique physicochemical properties of clathrate hydrates, efforts are being made to utilize synthetic clathrate hydrates in various separation processes such as post- and pre-combustion CO₂ capture, H₂ storage, natural gas …