Scalable MOF-based mixed matrix membranes with enhanced permeation processes facilitate the scale application of membrane-based carbon capture technologies

Carbon Capture Science & Technology Pub Date : 2024-08-16 DOI:10.1016/j.ccst.2024.100276

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Abstract

Mixed-matrix membranes (MMMs) leverage the processability of polymers and selectivity of Metal-Organic Frameworks (MOFs). However, they still suffer from poor interfacial compatibility and limited scalability in preparation. In certain polymers, MOFs can bridge the pores within the polymer membrane, enhancing the CO₂ adsorption and solubility properties, thus selectively boosting the CO₂ permeability. In this study, high-performance MMMs were prepared using scalable CALF-20 in combination with PIM-1. MMMs with a 5% doping level achieved CO₂ permeability up to 8003 barrer with 25% improvement in CO₂/N₂ selectivity. This enhancement was attributed to well-designed MMMs, where MOFs matched the abundant non-interconnecting pores in the PIM-1 membrane. This study represents a significant advancement towards scaling up the preparation of high-performance MOF-based MMMs for carbon capture applications.

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具有增强渗透过程的可扩展 MOF 基混合基质膜促进了膜法碳捕集技术的规模化应用

混合基质膜（MMMs）利用了聚合物的可加工性和金属有机框架（MOFs）的选择性。然而，它们在制备过程中仍然存在界面兼容性差和可扩展性有限的问题。在某些聚合物中，MOFs 可以弥合聚合物膜内的孔隙，增强二氧化碳的吸附和溶解特性，从而有选择性地提高二氧化碳的渗透性。本研究使用可扩展的 CALF-20 与 PIM-1 结合制备了高性能 MMM。掺杂水平为 5%的 MMM 的二氧化碳渗透率高达 8003 barrer，二氧化碳/氮气选择性提高了 25%。这种提高归功于精心设计的 MMM，其中的 MOF 与 PIM-1 膜中丰富的非互联孔相匹配。这项研究标志着在为碳捕集应用扩大基于 MOF 的高性能 MMM 制备规模方面取得了重大进展。

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Carbon Capture Science & Technology

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