Yang Shaowei, Min Byunghyun, Fu Qiang, Jones Christopher W, Nair Sankar
School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW, Atlanta, GA 30332, USA.
Current address: Chemical and Biomedical Engineering Department, Cleveland State University, Cleveland, OH 44115, USA.
Angew Chem Int Ed Engl. 2022 Jul 18;61(29):e202204265. doi: 10.1002/anie.202204265. Epub 2022 May 31.
Zeolite membranes show great potential for gas and hydrocarbon separations, but high manufacturing cost has been one of the main hurdles in their industrial application. Here we demonstrate a method termed viscosity-confined dry gel conversion (VCDGC) for zeolite hollow fiber membrane fabrication. We demonstrate in detail the VCDGC synthesis of small-pore CHA zeolite membranes. Extensive permeation measurements reveal that dry gel-processed CHA zeolite hollow fiber membranes have excellent gas and hydrocarbon separation characteristics well exceeding or comparable to current membranes. Medium-pore MFI membranes are also fabricated, and their favorable hydrocarbon separation characteristics indicate the versatility and reliability of the VCDGC method.
沸石膜在气体和碳氢化合物分离方面显示出巨大潜力，但高制造成本一直是其工业应用的主要障碍之一。在此，我们展示了一种用于制备沸石中空纤维膜的方法，称为粘度受限干凝胶转化法（VCDGC）。我们详细展示了小孔径CHA沸石膜的VCDGC合成过程。大量的渗透测量结果表明，干凝胶法制备的CHA沸石中空纤维膜具有优异的气体和碳氢化合物分离特性，远远超过或可与目前的膜相媲美。中孔径MFI膜也已制备成功，其良好的碳氢化合物分离特性表明了VCDGC方法的通用性和可靠性。
