Mixed Matrix Membranes with Surface Functionalized Metal–Organic Framework Sieves for Efficient Propylene/Propane Separation,Advanced Materials

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Mixed Matrix Membranes with Surface Functionalized Metal–Organic Framework Sieves for Efficient Propylene/Propane Separation
Advanced Materials ( IF 27.4 ) Pub Date : 2023-04-12 , DOI: 10.1002/adma.202300296
Youdong Cheng ₁ , Biplab Joarder ₁ , Shuvo Jit Datta ₁ , Norah Alsadun _{1,

2} , Daria Poloneeva ₃ , Dong Fan ₄ , Rushana Khairova ₃ , Anastasiya Bavykina ₃ , Jiangtao Jia ₁ , Osama Shekhah ₁ , Aleksander Shkurenko ₁ , Guillaume Maurin ₄ , Jorge Gascon ₃ , Mohamed Eddaoudi ₁

Affiliation

Membrane technology, regarded as an environmentally friendly and sustainable approach, offers great potential to address the large energy penalty associated with the energy-intensive propylene/propane separation. Quest for molecular sieving membranes for this important separation is of tremendous interest. Here, a fluorinated metal–organic framework (MOF) material, known as KAUST-7 (KAUST: King Abdullah University of Science and Technology) with well-defined narrow 1D channels that can effectively discriminate propylene from propane based on a size-sieving mechanism, is successfully incorporated into a polyimide matrix to fabricate molecular sieving mixed matrix membranes (MMMs). Markedly, the surface functionalization of KAUST-7 nanoparticles with carbene moieties affords the requisite interfacial compatibility, with minimal nonselective defects at polymer–filler interfaces, for the fabrication of a molecular sieving MMM. The optimal membrane with a high MOF loading (up to 45 wt.%) displays a propylene permeability of ≈95 barrer and a mixed propylene/propane selectivity of ≈20, far exceeding the state-of-the-art upper bound limits. Moreover, the resultant membrane exhibits robust structural stability under practical conditions, including high pressures (up to 8 bar) and temperatures (up to 100 °C). The observed outstanding performance attests to the importance of surface engineering for the preparation and plausible deployment of high-performance MMMs for industrial applications.

中文翻译：

具有表面功能化金属有机框架筛的混合基质膜可有效分离丙烯/丙烷

膜技术被认为是一种环保且可持续的方法，为解决与能源密集型丙烯/丙烷分离相关的巨大能源损失提供了巨大的潜力。寻找用于这种重要分离的分子筛膜引起了极大的兴趣。这里，一种氟化金属有机框架（MOF）材料，被称为 KAUST-7（KAUST：阿卜杜拉国王科技大学），具有明确的窄一维通道，可以基于尺寸筛分机制有效区分丙烯和丙烷，成功地融入聚酰亚胺基质中以制造分子筛混合基质膜（MMM）。显然，带有卡宾部分的 KAUST-7 纳米粒子的表面功能化提供了必要的界面相容性，在聚合物-填料界面处具有最小的非选择性缺陷，用于分子筛 MMM 的制造。具有高 MOF 负载量（高达 45 wt.%）的最佳膜表现出约 95 barrer 的丙烯渗透性和约 20 的混合丙烯/丙烷选择性，远远超过了最先进的上限。此外，所得膜在实际条件下表现出强大的结构稳定性，包括高压（高达8巴）和温度（高达100°C）。观察到的出色性能证明了表面工程对于工业应用高性能 MMM 的制备和合理部署的重要性。%）显示出约 95 barrer 的丙烯渗透率和约 20 的混合丙烯/丙烷选择性，远远超过了最先进的上限。此外，所得膜在实际条件下表现出强大的结构稳定性，包括高压（高达8巴）和温度（高达100°C）。观察到的出色性能证明了表面工程对于工业应用高性能 MMM 的制备和合理部署的重要性。%）显示出约 95 barrer 的丙烯渗透率和约 20 的混合丙烯/丙烷选择性，远远超过了最先进的上限。此外，所得膜在实际条件下表现出强大的结构稳定性，包括高压（高达8巴）和温度（高达100°C）。观察到的出色性能证明了表面工程对于工业应用高性能 MMM 的制备和合理部署的重要性。

更新日期：2023-04-12

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