Separation of propyne/propylene (C₃H₄/C₃H₆) is more difficult and challenging than that of acetylene/ethylene (C₂H₂/C₂H₄) because of their closer molecular sizes. A comprehensive screening of a series of metal–organic frameworks with broad types of structures, pore sizes, and functionalities was carried out. UTSA‐200 was identified as the best separating material for the removal of trace C₃H₄ from C₃H₄/C₃H₆ mixtures. Gas sorption isotherms reveal that UTSA‐200 exhibits by far the highest C₃H₄ adsorption capacity (95 cm³ cm⁻³ at 0.01 bar and 298 K) and record C₃H₄/C₃H₆ selectivity, which was mainly attributed to the suitable dynamic pore size to efficiently block the larger C₃H₆ molecule whilst the strong binding sites and pore flexibility capture smaller C₃H₄. This material thus provides record purification capacity for the removal of C₃H₄ from a 1:99 (or 0.1:99.9, v/v) C₃H₄/C₃H₆ mixture to produce 99.9999 % pure C₃H₆ with a productivity of 62.0 (or 142.8) mmol g⁻¹.

中文翻译：

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具有合适孔径和特定功能部位的金属有机框架，用于从丙烯中去除痕量丙烯

丙炔/丙烯（C ₃ H ₄ / C ₃ H ₆）的分离比乙炔/乙烯（C ₂ H ₂ / C ₂ H ₄）的分离更困难和挑战，因为它们的分子尺寸更近。对具有广泛类型的结构，孔径和功能性的一系列金属有机框架进行了全面筛选。UTSA-200被认为是从C ₃ H ₄ / C ₃ H _6中去除痕量C ₃ H ₄的最佳分离材料混合物。气体吸附等温线表明，UTSA-200迄今为止具有最高的C ₃ H ₄吸附容量（在0.01 bar和298 K时为95 cm ³  cm ^-3），并记录了C ₃ H ₄ / C ₃ H ₆选择性。达到合适的动态孔径，以有效地阻断较大的C ₃ H ₆分子，同时强大的结合位点和孔柔性捕获较小的C ₃ H ₄。因此，这种材料提供了创纪录的净化能力，可从1:99（或0.1：99.9，v / v）的C中去除C ₃ H ₄。₃ H ₄ / C ₃ H ₆混合物，制得纯度为99.9999％的C ₃ H ₆，产率为62.0（或142.8）mmol g ^-1。