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Abstract：
Rigid molecular sieving materials are the ideal candidates for gas separation (e. g., C2 H2 /C2 H4 ) due to their ultrahigh adsorption selectivity and the absence of gas co-adsorption. However, the absolute molecular sieving effect for C2 H2 /C2 H4 separation has rarely been realized because of their similar physicochemical properties. Herein, we demonstrate the absolute molecular sieving of C2 H2 from C2 H4 by a rigid ultra-microporous metal-organic framework (F-PYMO-Cu) with 1D regular channels (pore size of ca. 3.4 Å). F-PYMO-Cu exhibited moderate acetylene uptake (35.5 cm3 /cm3 ), but very low ethylene uptake (0.55 cm3 /cm3 ) at 298 K and 1 bar, yielding the second highest C2 H2 /C2 H4 uptake ratio of 63.6 up to now. One-step C2 H4 production from a binary mixture of C2 H2 /C2 H4 and a ternary mixture of C2 H2 /CO2 /C2 H4 at 298 K was achieved and verified by dynamic breakthrough experiments. Coupled with excellent thermal and water stability, F-PYMO-Cu could be a promising candidate for industrial C2 separation tasks.
摘要：
刚性分子筛材料是气体分离的理想候选材料（例如Procedure,C2H2/C2H4）由于其超高的吸附选择性和不存在气体共吸附。然而,由于其相似的物理化学性质，很少实现C2H2/C2H4分离的绝对分子筛筛选效果。在这里，我们证明了通过具有1D常规通道（孔径约为3.4贝达)。F-PYMO-Cu表现出中等的乙炔吸收（35.5cm3/cm3），但在298K和1巴下乙烯吸收非常低（0.55cm3/cm3），到目前为止，第二高的C2H2/C2H4吸收比为63.6。在298K下从C2H2/C2H4的二元混合物和C2H2/CO2/C2H4的三元混合物中一步生产C2H4，并通过动态突破实验进行了验证。加上优异的热稳定性和水稳定性，F-PYMO-Cu可能是工业C2分离任务的有希望的候选者。
