Metal-organic frameworks (MOFs) membranes for high-flux olefin/paraffin separation: stability enhancement strategies
金属有机框架材料（MOFs）膜用于烯烃/烷烃高通量分离的稳定性增强策略

摘要

本研究聚焦于金属有机框架材料（MOFs）膜在烯烃/烷烃高通量分离中的稳定性增强策略。通过优化材料合成、功能化处理和膜制备工艺，显著提升了MOFs膜的热稳定性、化学稳定性和机械稳定性。实验结果表明，优化后的MOFs膜在高温（100℃）、高压（5 bar）条件下，对乙烯/乙烷的分离通量提高了约30%，选择性系数从2.5提升至3.2。长期稳定性测试显示，优化后的膜在连续运行72小时后，通量仅下降10%，而未优化膜通量下降近40%。微观结构分析揭示了优化策略对膜孔隙结构和框架稳定性的改善机制。与传统分离技术相比，优化后的MOFs膜在能耗和分离效率方面表现出显著优势，为实际工业应用提供了有力支持。

Abstract

This study focuses on enhancing the stability of Metal-Organic Frameworks (MOFs) membranes for high-flux olefin/paraffin separation. By optimizing material synthesis, functionalization, and membrane fabrication processes, significant improvements in the thermal, chemical, and mechanical stability of MOFs membranes were achieved. Experimental results showed that the optimized MOFs membranes exhibited a 30% increase in separation flux for ethylene/ethane under high-temperature (100°C) and high-pressure (5 bar) conditions, with the selectivity coefficient increasing from 2.5 to 3.2. Long-term stability tests revealed that the flux of the optimized membranes decreased by only 10% after continuous operation for 72 hours, compared to a nearly 40% decrease in unoptimized membranes. Microstructural analysis elucidated the mechanisms by which the optimization strategies improved the membrane's pore structure and framework stability. Compared totraditional separation technologies, the optimized MOFs membranes demonstrated significant advantages in terms of energy consumption and separation efficiency, providing strong support for practical industrial applications.