分子筛
动力学
化学
吸附
化学工程
分离(统计)
超短脉冲
筛子(范畴论)
色谱法
材料科学
有机化学
计算机科学
光学
激光器
数学
工程类
物理
机器学习
组合数学
量子力学
作者
Jiyu Cui,Zhaoqiang Zhang,Lifeng Yang,Jianbo Hu,Anye Jin,Zhenglu Yang,Yue Zhao,Biao Meng,Yu Zhou,Jun Wang,Yun Su,Jun Wang,Xili Cui,Huabin Xing
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2023-12-14
卷期号:383 (6679): 179-183
被引量:43
标识
DOI:10.1126/science.abn8418
摘要
The design of molecular sieves is vital for gas separation, but it suffers from a long-standing issue of slow adsorption kinetics due to the intrinsic contradiction between molecular sieving and diffusion within restricted nanopores. We report a molecular sieve ZU-609 with local sieving channels that feature molecular sieving gates and rapid diffusion channels. The precise cross-sectional cutoff of molecular sieving gates enables the exclusion of propane from propylene. The coexisting large channels constituted by sulfonic anions and helically arranged metal-organic architectures allow the fast adsorption kinetics of propylene, and the measured propylene diffusion coefficient in ZU-609 is one to two orders of magnitude higher than previous molecular sieves. Propylene with 99.9% purity is obtained through breakthrough experiments with a productivity of 32.2 L kg −1 .
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