Adsorptive separation of ethylene/ethane (C₂H₄/C₂H₆) binary mixture has growing interest in petrochemical industries compared to the conventional energy-intensive cryogenic distillation. Development of moisture-stable materials with high selectivity is of great importance to accomplish C₂H₄/C₂H₆ separation. Coordination pillared-layer metal-organic framework (CPL-MOF) CPL-2 was synthesised at room temperature, and then modified by silver ions impregnation to enhance the selectivity towards ethylene over ethane. The synthesised CPL-2 and Ag/CPL-2 MOFs have excellent moisture stability which was confirmed by the dynamic water vapour adsorption analysis under 90% relative humidity, showing no significant framework decomposition, even at 50 °C. The calculated selectivity based on gravimetric single-component gas adsorption experiments shows the significantly improved C₂H₄/C₂H₆ selectivity from 1.4 to 26.1 after loading 10 wt% (theoretical) of silver ions on CPL-2. Breakthrough experiments for C₂H₄/C₂H₆ (1:1, v/v) mixture suggest that both CPL-2 and 10 wt% Ag/CPL-2 can achieve the binary mixture separation, and 10 wt% Ag/CPL-2 shows relatively better dynamic separation performance compared to parent CPL-2. The good adsorption selectivity and moisture stability allow CPL-MOF to be a class of promising porous materials for further exploitation in the separation of C₂H₄/C₂H₆ mixtures. Additionally, the method presented here can potentially be extended to other CPLs with different pore sizes for alkene/alkane separations.

与常规的高能耗低温蒸馏相比，乙烯/乙烷（C ₂ H ₄ / C ₂ H ₆）二元混合物的吸附分离在石油化工行业中的兴趣日益浓厚。开发具有高选择性的耐湿材料对于实现C ₂ H ₄ / C ₂ H ₆至关重要。分离。配位柱状金属-有机骨架（CPL-MOF）CPL-2在室温下合成，然后通过银离子浸渍进行改性，以提高对乙烯的选择性。合成的CPL-2和Ag / CPL-2 MOF具有优异的水分稳定性，这在90％相对湿度下通过动态水蒸气吸附分析得到了证实，即使在50°C时，也没有显示出明显的骨架分解。根据重量法单组分气体吸附实验计算出的选择性表明，在CPL-2上负载10 wt％（理论上）的银离子后，C ₂ H ₄ / C ₂ H ₆选择性从1.4显着提高到26.1。C ₂ H的突破性实验₄ / C ₂ H ₆（1：1，v / v）混合物表明CPL-2和10 wt％Ag / CPL-2均可实现二元混合物分离，而10 wt％Ag / CPL-2显示相对更好与母体CPL-2相比，具有更高的动态分离性能。良好的吸附选择性和水分稳定性使CPL-MOF成为一类有前途的多孔材料，可用于进一步分离C ₂ H ₄ / C ₂ H ₆混合物。另外，此处介绍的方法可以潜在地扩展到具有不同孔径的其他CPL，用于烯烃/烷烃分离。