Sandru Marius, Prache Marie, Macron Thomas, Căta Lidia, Ahunbay Mehmet Göktuğ, Hägg May-Britt, Maurin Guillaume, Barboiu Mihail
SINTEF Industry, SINTEF AS, NO-7465, Trondheim, Norway.
Department of Chemical Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
Sci Adv. 2024 Nov 15;10(46):eadq5024. doi: 10.1126/sciadv.adq5024. Epub 2024 Nov 13.
The capture of CO is of high interest in our society representing an essential tool to mitigate man-made climate warming. Membrane technology applied for CO capture offers several advantages in terms of energy savings, simple operation, and easy scale-up. Glassy membranes are associated with low gas permeability that negatively affect on their industrial implementation. Oppositely, rubbery membranes offer high permeability, but their selectivity is low. Here we report rubbery organic frameworks (ROFs) combining the high permeability of soft matrices with the high sieving selectivity of molecular frameworks. The best performing membranes provide a CO/N selectivity up to 104 with a CO permeability up to 1000 Barrer, representing relevant performances for industrial implementation. Water vapors have a positive effect on CO permeability, and the CO/N selectivity is higher than in dry conditions, as most of CO gas emissions are present in fully humidified gas streams. The synergetic high permeability/selectivity performances are superior to that observed with current state-of-the-art polymeric membranes.
捕获二氧化碳在我们的社会中备受关注，它是缓解人为气候变暖的一项重要工具。应用于二氧化碳捕获的膜技术在节能、操作简单和易于扩大规模方面具有诸多优势。玻璃态膜的气体渗透率较低，这对其工业应用产生了负面影响。相反，橡胶态膜具有高渗透率，但选择性较低。在此，我们报道了橡胶态有机框架材料（ROFs），它将柔软基质的高渗透率与分子框架的高筛分选择性结合在一起。性能最佳的膜材料提供高达104的CO/N选择性以及高达1000 Barrer的CO渗透率，代表了工业应用的相关性能。水蒸气对CO渗透率有积极影响，并且CO/N选择性高于干燥条件下的情况，因为大多数CO气体排放存在于完全湿润的气流中。这种协同的高渗透率/选择性性能优于目前最先进的聚合物膜。
