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[Display omitted] • LTA type membranes were fabricated on capillary and tubular supports. • Fluorescence confocal optical microscopy revealed no defects in the membranes. • Membrane worked well for azeotropic H 2 O/isopropanol/epichlorohydrin mixtures. • Use of capillary supports with thinner wall thickness allowed for a high H 2 O flux. • Capillary-supported membranes showed marked dehydration even at low H 2 O contents. 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 H 2 O 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 fluorescence confocal optical microscopy analysis. Accordingly, both membranes effectively dehydrated an azeotropic ternary mixture of H 2 O/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 H 2 O flux was ca. 8.02 ± 0.94 kg·m−2·h−1 for the azeotropic ternary mixture (20 wt% H 2 O/30 wt% IPA/50 wt% ECH) at 70 °C (vs. 4.26 ± 0.39 kg·m−2·h−1 through the LTA membrane on the conventional tube). Further, the H 2 O/IPA and H 2 O/ECH separation factors exceeded approximately 10,000. Finally, a comparison with the literature data revealed that the capillary-supported LTA membrane had higher H 2 O flux and selectivity for H 2 O/IPA mixtures than other LTA membranes prepared on conventional discs/sheets/tubes. [ABSTRACT FROM AUTHOR]