Selective SF 6 /N 2 Separation with High Uptake Under Low Pressures by Stable Al-MOF

作者：Shuang Ni, Lili Xu, Xiting Zhang, Shao-Min Wang, Qing‐Yuan Yang · 发表于：Inorganic Chemistry · 年份：2025 · DOI：10.1021/acs.inorgchem.5c02614 · 被引用次数：11 · 研究领域：Metal-Organic Frameworks: Synthesis and Applications、Inorganic Fluorides and Related Compounds、Gas Sensing Nanomaterials and Sensors

Efficient and economical capture and separation of sulfur hexafluoride (SF 6 ) are critical for emissions mitigation and industrial reuse. Conventional distillation methods remain energy-intensive, prompting the need for cost-effective alternatives. Here, MOF-303, constructed from earth-abundant aluminum and low-cost linkers, features optimally sized pores (8.3 Å) that selectively adsorb SF 6 (5.5 Å) over N 2 (3.6 Å). This rational pore engineering enables MOF-303 to achieve benchmark SF 6 capture (1.91 mmol g –1 at P < 0.1 bar) with exceptional selectivity (148), while its low regeneration energy (22.9 kJ mol –1 ) ensures practical cycling. Breakthrough experiments confirm robust performance under dynamic conditions. Computational studies reveal how pore geometry enables size-exclusive recognition. Compared to noble-metal adsorbents, MOF-303’s earth-abundant components reduce costs by >70%, offering a sustainable solution for industrial SF 6 recovery.