TY - JOUR
T1 - Template-free fabrication of large-scale and highly water-selective monolithic chabazite membranes for water/ethanol separation
AU - Chen, Liang
AU - Yu, Shilei
AU - Wang, Renxiang
AU - Zhang, Pengfei
AU - Xue, Zhigang
AU - Wang, Bin
AU - Liu, Bo
AU - Zhou, Rongfei
N1 - Publisher Copyright:
© 2025
PY - 2025/6
Y1 - 2025/6
N2 - The fabrication of large-scale membranes with precisely controlled nanochannel dimensions and exceptional water-steam selectivity remains a formidable challenge. In this study, we have demonstrated the synthesis of high-quality of water-permeable chabazite membranes on 19-channel monolithic supports, which owned a large membrane area of 550 cm2 and a high surface-to-volume ratio of 311 m2/m3. The area of pilot-scale monolithic membrane was 50 % higher than the commercialized tubular membrane. Intergrown chabazite membranes were prepared on the large-area monolithic supports by optimizing synthesis parameters such as seeding and gel composition. The best membrane on large-area support prepared under optimized conditions exhibited water flux, water permeance and water/ethanol selectivity of 1.6 kg/(m2 h), 3.4 × 10−7 mol/(m2 s Pa) and 22,000 at 393 K by vapor permeation (VP), respectively. The effects of temperature and feed composition on separation performance were comprehensively investigated by VP and PV. Furthermore, the membranes displayed remarkable hydrothermal stability even in a high-water-content ethanol aqueous solution with 50 wt% water in PV model at 358 K and in VP model at 393 K for 6 days. The robust monolithic chabazite membranes, characterized by high surface-to-volume ratio, strong mechanical integrity, large area, and high separation performance, show the great potentials for water/organic separations.
AB - The fabrication of large-scale membranes with precisely controlled nanochannel dimensions and exceptional water-steam selectivity remains a formidable challenge. In this study, we have demonstrated the synthesis of high-quality of water-permeable chabazite membranes on 19-channel monolithic supports, which owned a large membrane area of 550 cm2 and a high surface-to-volume ratio of 311 m2/m3. The area of pilot-scale monolithic membrane was 50 % higher than the commercialized tubular membrane. Intergrown chabazite membranes were prepared on the large-area monolithic supports by optimizing synthesis parameters such as seeding and gel composition. The best membrane on large-area support prepared under optimized conditions exhibited water flux, water permeance and water/ethanol selectivity of 1.6 kg/(m2 h), 3.4 × 10−7 mol/(m2 s Pa) and 22,000 at 393 K by vapor permeation (VP), respectively. The effects of temperature and feed composition on separation performance were comprehensively investigated by VP and PV. Furthermore, the membranes displayed remarkable hydrothermal stability even in a high-water-content ethanol aqueous solution with 50 wt% water in PV model at 358 K and in VP model at 393 K for 6 days. The robust monolithic chabazite membranes, characterized by high surface-to-volume ratio, strong mechanical integrity, large area, and high separation performance, show the great potentials for water/organic separations.
KW - Chabazite
KW - Monolithic
KW - Pervaporation
KW - Vapor permeation
KW - Zeolite membrane
UR - http://www.scopus.com/inward/record.url?scp=105003577086&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2025.124150
DO - 10.1016/j.memsci.2025.124150
M3 - 文章
AN - SCOPUS:105003577086
SN - 0376-7388
VL - 728
JO - Journal of Membrane Science
JF - Journal of Membrane Science
M1 - 124150
ER -