Kim, Pyoseop Kwon, YongSung Lee, Minseong Kim, DaeHun Park, You-In Choi, Nakwon Nam, Seung-Eun Choi, Jungkyu 2024-01-19T09:30:11Z 2024-01-19T09:30:11Z 2023-11-15 2023-06 1383-5866 https://pubs.kist.re.kr/handle/201004/113614 Among the various zeolite membranes, hydrophilic Linde Type A (LTA) zeolite membranes (LTA membranes) are highly desirable for the dehydration of organic solvents. In particular, both high flux and separation factors for H2O can be achieved with such membranes. Therefore, in this study, we fabricated LTA membranes on thin-walled capillary tubes and compared the dehydration performance with those of LTA membranes prepared on conventional tubular supports. We found that neither LTA membrane contained noticeable defects using fluo-rescence confocal optical microscopy analysis. Accordingly, both membranes effectively dehydrated an azeo-tropic ternary mixture of H2O/isopropanol (IPA)/epichlorohydrin (ECH), an industrially important mixture. Specifically, the capillary-supported LTA membrane showed better dehydration performance than that on the conventional tubular support, mainly because of the relatively thinner support thickness (ca. 0.35 mm vs. 2 mm of the conventional tubular support). The corresponding H2O flux was ca. 8.02 +/- 0.94 kg center dot m- 2 center dot h-1 for the azeotropic ternary mixture (20 wt% H2O/30 wt% IPA/50 wt% ECH) at 70 degrees C (vs. 4.26 +/- 0.39 kg center dot m- 2 center dot h-1 through the LTA membrane on the conventional tube). Further, the H2O/IPA and H2O/ECH separation factors exceeded approximately 10,000. Finally, a comparison with the literature data revealed that the capillary-supported LTA membrane had higher H2O flux and selectivity for H2O/IPA mixtures than other LTA mem-branes prepared on conventional discs/sheets/tubes. English Pergamon Press Ltd. LTA zeolite membranes on thin-walled capillary tubes for the high-throughput dehydration of industrially important ternary water/isopropanol/epichlorohydrin mixtures Article 10.1016/j.seppur.2023.123733 1 Separation and Purification Technology, v.315 Separation and Purification Technology 315 N scie scopus 000978052900001 2-s2.0-85151543861 Engineering, Chemical Engineering Article NAA ZEOLITE HIGH-PERFORMANCE HOLLOW-FIBER NANOCOMPOSITE MEMBRANE HYDROTHERMAL SYNTHESIS MICROWAVE SYNTHESIS VAPOR PERMEATION SECONDARY GROWTH MFI MEMBRANES PERVAPORATION DEHYDRATION LTA zeolite membrane Capillary tube Secondary growth Pervaporation H 2 O isopropanol epichlorohydrin separation