Highly selective adsorptive separation of olefin/paraffin through porous materials can produce high purity olefins in a much more energy-efficient way than the traditional cryogenic distillation. Here we report an ultramicroporous cobalt gallate metal-organic framework (Co-gallate) for the highly selective sieving separation of propylene/propane at ambient conditions. This material possesses optimal pore structure for the exact confinement of propylene molecules while excluding the slightly large propane molecules, as clearly demonstrated in the neutron diffraction crystal structure of Co-gallate⊃0.38C3D6. Its high separation performance has been confirmed by the gas sorption isotherms and column breakthrough experiments to produce the high purity of propylene (97.7%) with a high dynamic separation productivity of 36.4 cm3 cm-3 under ambient conditions. The gas adsorption measurement, pore size distribution, and crystallographic and modeling studies comprehensively support the high sieving C3H6/C3H8 separation in this MOF material. It is stable under different environments, providing its potential for the industrial propylene purification.

中文翻译：

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用于从丙烷中高筛分分离丙烯的超微孔金属-有机骨架

通过多孔材料对烯烃/石蜡进行高选择性吸附分离可以以比传统低温蒸馏更节能的方式生产高纯度烯烃。在这里，我们报告了一种超微孔镓酸钴金属有机骨架（Co-gallate），用于在环境条件下对丙烯/丙烷进行高选择性筛分分离。这种材料具有用于精确限制丙烯分子的最佳孔结构，同时排除稍大的丙烷分子，如 Co-gallate⊃0.38C3D6 的中子衍射晶体结构清楚地证明。气体吸附等温线和色谱柱突破实验证实了其高分离性能，可生产高纯度丙烯 (97.7%)，动态分离生产率高达 36。4 cm3 cm-3 在环境条件下。气体吸附测量、孔径分布以及晶体学和建模研究全面支持这种 MOF 材料中的高筛分 C3H6/C3H8 分离。它在不同环境下稳定，为工业丙烯提纯提供了潜力。