Zeolite Membrane for Dehydration of Isopropylalcohol–Water Mixture by Vapor Permeation

Abstract

Highly stable FAU-type zeolite membrane for the separation of isopropanol (IPA)-water mixture by pervaporation is described. FAU membrane showed high water permselectivity and permeance. Comparison of FAU membrane with a conventional LTA-type zeolite membrane revealed superior stability of FAU zeolite membrane in a mixture containing a large water content.

FAU zeolite membranes for dewatering of amine‐based post‐combustion CO2 capture solutions

“…The cross‐sectional Si/Al ratio indicated by line scan was consistent (0.93 ± 0.17 and 0.94 ± 0.13) with the membrane surface (0.94 ± 0.01). The SEM images of M15 treated with deionized water (Figure 8a,b) indicated a distinct change for external crystal morphology, from the typical octahedral crystals to a pitted surface, consistent with the morphology of FAU membrane (Si/Al = 1.4) immersed in 50/50 wt% IPA/water mixture at 130°C, 42 hr reported by Sawamura et al 23 A significant Si/Al ratio decrease from 0.94 ± 0.01 to 0.42 ± 0.10 was measured on the membrane surface (Table S2). However, a lower degree of membrane damage was found in post‐treatment solvents with lower water content.…”

“…Among these zeolites, FAU zeolite membranes with 0.74 nm pore size and 12‐membered rings, are well suited for the separation of large molecules which cannot be handled by MFI or LTA with the advantage of its relatively larger pore size. In addition, FAU zeolite membranes display high hydrophilicity due to a relatively low Si/Al ratio of 1–3, which is helpful for the adsorption and diffusion of water molecules, meaning they can be effectively utilized in the dehydration of organic solvents like isopropanol/water, tetrahydrofuran/water, methanol/methyl methacrylate, and ethanol/ethyl tert‐butyl ether 23‐25 . However, a limited number of studies regarding applying zeolite membranes in the dewatering of amine‐based CO 2 capture solutions have been reported 10 .…”

Covalent and Selective Grafting of Polyethylene Glycol Brushes at the Surface of ZIF-8 for the Processing of Membranes for Pervaporation

“…However, its current production involves an energy-intensive azeotropic distillation process and it is of high interest to replace it by low-energy demanding process such as membrane-based dehydration unit. 57 PEG-g-ZIF-8/PVA membranes were thus elaborated for the separation of IPA-H 2 O mixture by pervaporation. However, as shown by STEM-HAADF, composite films of PEG 5000 -g-ZIF-8/PVA that were cast directly from PEG-g-ZIF-8/PVA suspensions, consist of aggregates with a diameter of a few hundred nanometers ( Figure S9 of SI).…”

A Review on Catalytic Membranes Production and Applications

“…Wang et al [36] studied a novel method in to deposit the nanoparticles on the polymeric membrane surface using the roll to roll process [36]. Polymer membranes have low fabricating costs due to use the roll-to-roll fabrication process [37,38]. Also, this process can be applied for nanoparticle alignment on membrane support and pattern printing on membrane films [39].…”