LTA zeolite membranes on thin-walled capillary tubes for the high-throughput dehydration of industrially important ternary water/isopropanol/epichlorohydrin mixtures

Pyoseop Kim; Yong Sung Kwon; Minseong Lee; Dae Hun Kim; You In Park; Nakwon Choi; Seung Eun Nam; Jungkyu Choi

doi:10.1016/j.seppur.2023.123733

LTA zeolite membranes on thin-walled capillary tubes for the high-throughput dehydration of industrially important ternary water/isopropanol/epichlorohydrin mixtures

Pyoseop Kim
, Yong Sung Kwon
, Minseong Lee
, Dae Hun Kim
, You In Park
, Nakwon Choi
, Seung Eun Nam^*
, Jungkyu Choi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

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 fluorescence confocal optical microscopy analysis. Accordingly, both membranes effectively dehydrated an azeotropic 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·m⁻²·h⁻¹ for the azeotropic ternary mixture (20 wt% H₂O/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 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 membranes prepared on conventional discs/sheets/tubes.

Original language	English
Article number	123733
Journal	Separation and Purification Technology
Volume	315
DOIs	https://doi.org/10.1016/j.seppur.2023.123733
Publication status	Published - 2023 Jun 15

Bibliographical note

Funding Information:
This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (no. 20202020800330). In addition, this work was supported by the Mid-Career Researcher Program (2020R1A2C1101974) through the National Research Foundation of Korea , funded by the Korea government. FCOM characterizations were carried out at the KIST, while EDX characterization were conducted at the KBSI (Seoul Center).

Funding Information:
This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (no. 20202020800330). In addition, this work was supported by the Mid-Career Researcher Program (2020R1A2C1101974) through the National Research Foundation of Korea, funded by the Korea government. FCOM characterizations were carried out at the KIST, while EDX characterization were conducted at the KBSI (Seoul Center).

Publisher Copyright:
© 2023 Elsevier B.V.

Keywords

Capillary tube
HO/isopropanol/epichlorohydrin separation
LTA zeolite membrane
Pervaporation
Secondary growth

ASJC Scopus subject areas

Analytical Chemistry
Filtration and Separation

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10.1016/j.seppur.2023.123733

Cite this

@article{8a754241f16845c587bb8ead02df7885,

title = "LTA zeolite membranes on thin-walled capillary tubes for the high-throughput dehydration of industrially important ternary water/isopropanol/epichlorohydrin mixtures",

abstract = "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 fluorescence confocal optical microscopy analysis. Accordingly, both membranes effectively dehydrated an azeotropic 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·m−2·h−1 for the azeotropic ternary mixture (20 wt\% H2O/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 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 membranes prepared on conventional discs/sheets/tubes.",

keywords = "Capillary tube, HO/isopropanol/epichlorohydrin separation, LTA zeolite membrane, Pervaporation, Secondary growth",

author = "Pyoseop Kim and Kwon, \{Yong Sung\} and Minseong Lee and Kim, \{Dae Hun\} and Park, \{You In\} and Nakwon Choi and Nam, \{Seung Eun\} and Jungkyu Choi",

note = "Funding Information: This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (no. 20202020800330). In addition, this work was supported by the Mid-Career Researcher Program (2020R1A2C1101974) through the National Research Foundation of Korea , funded by the Korea government. FCOM characterizations were carried out at the KIST, while EDX characterization were conducted at the KBSI (Seoul Center). Funding Information: This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (no. 20202020800330). In addition, this work was supported by the Mid-Career Researcher Program (2020R1A2C1101974) through the National Research Foundation of Korea, funded by the Korea government. FCOM characterizations were carried out at the KIST, while EDX characterization were conducted at the KBSI (Seoul Center). Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

year = "2023",

month = jun,

day = "15",

doi = "10.1016/j.seppur.2023.123733",

language = "English",

volume = "315",

journal = "Separation and Purification Technology",

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publisher = "Elsevier B.V.",

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T1 - LTA zeolite membranes on thin-walled capillary tubes for the high-throughput dehydration of industrially important ternary water/isopropanol/epichlorohydrin mixtures

AU - Kim, Pyoseop

AU - Kwon, Yong Sung

AU - Lee, Minseong

AU - Kim, Dae Hun

AU - Park, You In

AU - Choi, Nakwon

AU - Nam, Seung Eun

AU - Choi, Jungkyu

N1 - Funding Information: This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (no. 20202020800330). In addition, this work was supported by the Mid-Career Researcher Program (2020R1A2C1101974) through the National Research Foundation of Korea , funded by the Korea government. FCOM characterizations were carried out at the KIST, while EDX characterization were conducted at the KBSI (Seoul Center). Funding Information: This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (no. 20202020800330). In addition, this work was supported by the Mid-Career Researcher Program (2020R1A2C1101974) through the National Research Foundation of Korea, funded by the Korea government. FCOM characterizations were carried out at the KIST, while EDX characterization were conducted at the KBSI (Seoul Center). Publisher Copyright: © 2023 Elsevier B.V.

PY - 2023/6/15

Y1 - 2023/6/15

N2 - 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 fluorescence confocal optical microscopy analysis. Accordingly, both membranes effectively dehydrated an azeotropic 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·m−2·h−1 for the azeotropic ternary mixture (20 wt% H2O/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 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 membranes prepared on conventional discs/sheets/tubes.

AB - 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 fluorescence confocal optical microscopy analysis. Accordingly, both membranes effectively dehydrated an azeotropic 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·m−2·h−1 for the azeotropic ternary mixture (20 wt% H2O/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 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 membranes prepared on conventional discs/sheets/tubes.

KW - Capillary tube

KW - HO/isopropanol/epichlorohydrin separation

KW - LTA zeolite membrane

KW - Pervaporation

KW - Secondary growth

UR - https://www.scopus.com/pages/publications/85151543861

U2 - 10.1016/j.seppur.2023.123733

DO - 10.1016/j.seppur.2023.123733

M3 - Article

AN - SCOPUS:85151543861

SN - 1383-5866

VL - 315

JO - Separation and Purification Technology

JF - Separation and Purification Technology

M1 - 123733

ER -

LTA zeolite membranes on thin-walled capillary tubes for the high-throughput dehydration of industrially important ternary water/isopropanol/epichlorohydrin mixtures

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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