Wiggling Mesopores Kinetically Amplify the Adsorptive Separation of Propylene/Propane

作者：Yafei Yuan, Yongsheng Wang, Xue‐Liang Zhang, Wen‐Cui Li, Guang‐Ping Hao, Lu Han, An‐Hui Lu · 发表于：Angewandte Chemie International Edition · 年份：2021 · DOI：10.1002/anie.202106523 · 被引用次数：74 · 研究领域：Mesoporous Materials and Catalysis、Covalent Organic Framework Applications、Metal-Organic Frameworks: Synthesis and Applications

Abstract Adsorptive separation is an appealing technology for propylene and propane separation; however, the challenge lies in the design of efficient adsorbents which can distinguish the two molecules having very similar properties. Here we report a kinetically amplified separation by creating wiggling mesopores in structurally robust carbon monoliths. The wiggling mesopores with alternating wide and narrow segments afford a surface area of 413 m 2 g −1 and a tri‐modal pore size distribution centered at 1.5, 4.2 and 6.6 nm, respectively. The synergistically kinetic and equilibrium effects were observed and quantitatively assessed, which together ensured a remarkable propylene/propane selectivity up to 39. This selectivity outperformed not only the available carbon adsorbents but also highly competitive among the dominated crystalline porous adsorbents. In addition, the wiggling mesoporous carbon adsorbent showed excellent dynamical separation stability, which ensured its great potential in practical molecular separations.