TY - JOUR
T1 - Control of intracrystalline diffusion in a bilayered metal-organic framework for efficient kinetic separation of propylene from propane
AU - Ding, Qi
AU - Zhang, Zhaoqiang
AU - Zhang, Peixin
AU - wang, Jun
AU - Cui, Xili
AU - He, Chao Hong
AU - Deng, Shuguang
AU - Xing, Huabin
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (No. 21938011 and 21725603 ), the Zhejiang Provincial Natural Science Foundation of China (No. LR20B060001 ), the National Program for Support of Top-notch Young Professionals (H. X.) and the Research Computing Center in College of Chemical and Biological Engineering at Zhejiang University.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/4/15
Y1 - 2022/4/15
N2 - Kinetic adsorptive separation represents a promising solution to improve the energy efficiency in industrially important gas separation processes that are prevailingly accomplished by traditional thermal-driven methods. Currently, pore-size tuning is deemed as a universal strategy to prompt the kinetic adsorptive separation but still meets with limited success for gas mixtures with highly similar kinetic size. Here, we report the high-efficient kinetic separation of propylene (C3H6) and propane (C3H8) in a bilayered metal−organic framework Zn-ATA (ATA = deprotonated 5-aminotetrazole) for the first time by manipulating intracrystalline diffusion and surface permeation. Flake-like Zn-ATA crystals featuring millimetric dimension and highly oriented growth were directly synthesized by hydrothermal method. Unexpectedly, with the adsorption kinetics dominated by intracrystalline diffusion, the material affords quasi-molecular-sieving kinetic separation of C3H6 and C3H8 with an excellent selectivity of 60, which is 50 times higher than nanometric Zn-ATA crystals. Breakthrough experiments indicate that high-purity C3H6 (93%) can be separated from C3H6/C3H8 mixture within only one adsorption–desorption cycle, setting a new benchmark for kinetic C3H6/C3H8 separation. Density-functional theory calculations were conducted and revealed the separation mechanism at the molecular level.
AB - Kinetic adsorptive separation represents a promising solution to improve the energy efficiency in industrially important gas separation processes that are prevailingly accomplished by traditional thermal-driven methods. Currently, pore-size tuning is deemed as a universal strategy to prompt the kinetic adsorptive separation but still meets with limited success for gas mixtures with highly similar kinetic size. Here, we report the high-efficient kinetic separation of propylene (C3H6) and propane (C3H8) in a bilayered metal−organic framework Zn-ATA (ATA = deprotonated 5-aminotetrazole) for the first time by manipulating intracrystalline diffusion and surface permeation. Flake-like Zn-ATA crystals featuring millimetric dimension and highly oriented growth were directly synthesized by hydrothermal method. Unexpectedly, with the adsorption kinetics dominated by intracrystalline diffusion, the material affords quasi-molecular-sieving kinetic separation of C3H6 and C3H8 with an excellent selectivity of 60, which is 50 times higher than nanometric Zn-ATA crystals. Breakthrough experiments indicate that high-purity C3H6 (93%) can be separated from C3H6/C3H8 mixture within only one adsorption–desorption cycle, setting a new benchmark for kinetic C3H6/C3H8 separation. Density-functional theory calculations were conducted and revealed the separation mechanism at the molecular level.
KW - Adsorptive separation
KW - Kinetic separation
KW - Metal–organic frameworks
KW - Propane
KW - Propylene
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U2 - 10.1016/j.cej.2022.134784
DO - 10.1016/j.cej.2022.134784
M3 - Article
AN - SCOPUS:85123216241
SN - 1385-8947
VL - 434
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 134784
ER -