TY - JOUR
T1 - Two novel 4,6-connected anion-pillared metal-organic frameworks for simultaneous separation of C3 and C4 olefins
AU - Liu, Yuan
AU - Zhang, Yan
AU - Zhang, Peixin
AU - Peng, Yong
AU - Liu, Xing
AU - Chen, Jingwen
AU - Chen, Shixia
AU - Zeng, Zheling
AU - Wang, Jun
AU - Deng, Shuguang
N1 - Funding Information:
This study was supported by the National Natural Science Foundation of China (No. 21908090 , 22008099 , 22108243 ) and the Natural Science Foundation of Jiangxi Province (No. 20192ACB21015 ).
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/2
Y1 - 2022/2
N2 - The adsorptive separation of C3 (propane/propylene) and C4 olefins (1,3-butadiene/C4 alkenes) by a single material are of great commercial significance to make full use of these raw chemicals and adsorbents; however, the precise fabrication of porous materials with fine-tuning pores and multiple binding sites to discriminate these guest molecules remain challenging. Herein, we report two new 4,6-connected fsc-net anion-pillared copper MOFs (TIFSIX-Cu-TPB and SIFSIX-Cu-TPB) for which the cavity and functional sites can be tuned by altering the anion pillars. The unique pore structure and abundant electronegative anions, as well as aromatic rings of MFSIX-Cu-TPB (M = Ti, Si), enabled the selective discrimination of both propylene/propane (C3H6/C3H8) and 1,3-butadiene/C4 olefins, displaying high propylene (2.85 mmol g−1) and 1,3-butadiene (3.35 mmol g−1) uptake at 1 bar and 298 K. Their separation performances are confirmed by breakthrough experiments, and the adsorption sites are identified by DFT-D calculations. To the best of our knowledge, the MFSIX-Cu-TPB (M = Ti, Si) represent the first example of anion-pillared MOFs that demonstrate the high separation efficiency in C3 and C4 olefin separations.
AB - The adsorptive separation of C3 (propane/propylene) and C4 olefins (1,3-butadiene/C4 alkenes) by a single material are of great commercial significance to make full use of these raw chemicals and adsorbents; however, the precise fabrication of porous materials with fine-tuning pores and multiple binding sites to discriminate these guest molecules remain challenging. Herein, we report two new 4,6-connected fsc-net anion-pillared copper MOFs (TIFSIX-Cu-TPB and SIFSIX-Cu-TPB) for which the cavity and functional sites can be tuned by altering the anion pillars. The unique pore structure and abundant electronegative anions, as well as aromatic rings of MFSIX-Cu-TPB (M = Ti, Si), enabled the selective discrimination of both propylene/propane (C3H6/C3H8) and 1,3-butadiene/C4 olefins, displaying high propylene (2.85 mmol g−1) and 1,3-butadiene (3.35 mmol g−1) uptake at 1 bar and 298 K. Their separation performances are confirmed by breakthrough experiments, and the adsorption sites are identified by DFT-D calculations. To the best of our knowledge, the MFSIX-Cu-TPB (M = Ti, Si) represent the first example of anion-pillared MOFs that demonstrate the high separation efficiency in C3 and C4 olefin separations.
KW - 1,3-butadiene
KW - Adsorptive separation
KW - Metal-organic frameworks
KW - Propylene
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U2 - 10.1016/j.cep.2021.108768
DO - 10.1016/j.cep.2021.108768
M3 - Article
AN - SCOPUS:85122125755
SN - 0255-2701
VL - 172
JO - Chemical Engineering and Processing - Process Intensification
JF - Chemical Engineering and Processing - Process Intensification
M1 - 108768
ER -