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Rational Design of Mixed Matrix Membranes Modulated by Trisilver Complex for Efficient Propylene/Propane Separation
Advanced Science ( IF 14.3 ) Pub Date : 2023-02-07 , DOI: 10.1002/advs.202206858 Shenzhen Cong 1 , Xiaoquan Feng 1 , Lili Guo 2 , Donglai Peng 3 , Jing Wang 1 , Jinghuo Chen 2 , Yatao Zhang 1 , Xiangjian Shen 1 , Guang Yang 2
Advanced Science ( IF 14.3 ) Pub Date : 2023-02-07 , DOI: 10.1002/advs.202206858 Shenzhen Cong 1 , Xiaoquan Feng 1 , Lili Guo 2 , Donglai Peng 3 , Jing Wang 1 , Jinghuo Chen 2 , Yatao Zhang 1 , Xiangjian Shen 1 , Guang Yang 2
Affiliation
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The application of membrane-based separation processes for propylene/propane (C3H6/C3H8) is extremely promising and attractive as it is poised to reduce the high operation cost of the established low temperature distillation process, but major challenges remain in achieving high gas selectivity/permeability and long-term membrane stability. Herein, a C3H6 facilitated transport membrane using trisilver pyrazolate (Ag3pz3) as a carrier filler is reported, which is uniformly dispersed in a polymer of intrinsic microporosity (PIM-1) matrix at the molecular level (≈15 nm), verified by several analytical techniques, including 3D-reconstructed focused ion beam scanning electron microscropy (FIB–SEM) tomography. The π-acidic Ag3pz3 combines preferentially with π-basic C3H6, which is confirmed by density functional theory calculations showing that the silver ions in Ag3pz3 form a reversible π complex with C3H6, endowing the membranes with superior C3H6 affinity. The resulting membranes exhibit superior stability, C3H6/C3H8 selectivity as high as ≈200 and excellent C3H6 permeability of 306 Barrer, surpassing the upper bound selectivity/permeability performance line of polymeric membranes. This work provides a conceptually new approach of using coordinatively unsaturated 0D complexes as fillers in mixed matrix membranes, which can accomplish olefin/alkane separation with high performance.
中文翻译：
用于高效丙烯/丙烷分离的三银络合物调制混合基质膜的合理设计
丙烯/丙烷 (C 3 H 6 /C 3 H 8 )膜分离工艺的应用极具前景和吸引力，因为它有望降低已建立的低温蒸馏工艺的高运营成本，但仍存在主要挑战在实现高气体选择性/渗透性和长期膜稳定性方面。在此，使用吡唑酸三银（Ag 3 pz 3) 作为载体填料，它在分子水平 (≈15 nm) 均匀分散在固有微孔聚合物 (PIM-1) 基质中，通过多种分析技术验证，包括 3D 重建聚焦离子束扫描电子显微镜(FIB–SEM) 断层扫描。π-酸性Ag 3 pz 3优先与π-碱性C 3 H 6结合，密度泛函理论计算证实了这一点，表明Ag 3 pz 3中的银离子与C 3 H 6形成可逆的π络合物，赋予具有优异 C 3 H的膜6亲和力。所得膜表现出优异的稳定性，高达≈200的C 3 H 6 /C 3 H 8选择性和306 Barrer的优异C 3 H 6渗透性，超过了聚合物膜的上限选择性/渗透性能线。这项工作提供了一种概念上的新方法，即使用配位不饱和 0D 配合物作为混合基质膜中的填料，可以实现烯烃/烷烃的高性能分离。
更新日期：2023-02-07
中文翻译：
用于高效丙烯/丙烷分离的三银络合物调制混合基质膜的合理设计
丙烯/丙烷 (C 3 H 6 /C 3 H 8 )膜分离工艺的应用极具前景和吸引力，因为它有望降低已建立的低温蒸馏工艺的高运营成本，但仍存在主要挑战在实现高气体选择性/渗透性和长期膜稳定性方面。在此，使用吡唑酸三银（Ag 3 pz 3) 作为载体填料，它在分子水平 (≈15 nm) 均匀分散在固有微孔聚合物 (PIM-1) 基质中，通过多种分析技术验证，包括 3D 重建聚焦离子束扫描电子显微镜(FIB–SEM) 断层扫描。π-酸性Ag 3 pz 3优先与π-碱性C 3 H 6结合，密度泛函理论计算证实了这一点，表明Ag 3 pz 3中的银离子与C 3 H 6形成可逆的π络合物，赋予具有优异 C 3 H的膜6亲和力。所得膜表现出优异的稳定性，高达≈200的C 3 H 6 /C 3 H 8选择性和306 Barrer的优异C 3 H 6渗透性，超过了聚合物膜的上限选择性/渗透性能线。这项工作提供了一种概念上的新方法，即使用配位不饱和 0D 配合物作为混合基质膜中的填料，可以实现烯烃/烷烃的高性能分离。
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