Unique H₂O Vortex in One New MOF Material Strengthening C₃H₆ Adsorption and Unprecedented Purification from C₂H₄/C₃H₈/C₃H₆ Mixtures

Abstract The gradual separation of the naphtha steam cracking product (propane/propylene/ethylene, C₃H₈/C₃H₆/C₂H₄) to obtain highly pure C₃H₆ is of great significance as it provides an alternative process for this important industrial feedstock. However, developing adsorbents to meet the efficient separation and purification application remains challenging. A water coordination‐decorated metal–organic framework (MOF, Cd‐dtzip‐H₂O) material is reported. Interestingly, water molecules cooperate with the framework to build a water vortex and significantly affect the preferential adsorption for C₃H₆. At 298 K and 100 kPa, the loading of C₃H₆ in the material is 112.0 cm³ g⁻¹, equivalent to 1.7 and 2.0 times of C₃H₈ and C₂H₄, respectively. Experimental breakthroughs show that the material efficiently separates C₃H₆/C₃H₈ and C₃H₆/C₂H₄ under different pressures. Meanwhile, it also unprecedentedly achieves the one‐step separation of C₂H₄/C₃H₈/C₃H₆ mixtures yielding high‐purity C₃H₆ (99.9%) and C₂H₄ (99.95%) products with the productivities of 38.2 and 12.7 L kg⁻¹, respectively.