Dual pore-size sieving in a novel oxygenate-pillared microporous adsorbent for C6 alkane isomers separation

Yun Su; Rundao Chen; Peixin Zhang; Xiao He; Xing Liu; Yuan Liu; Hanting Xiong; Zhiwei Zhao; Junhui Luo; Jingwen Chen; Shixia Chen; Zeling Zeng; Zongbi Bao; Shuguang Deng; Jun Wang

doi:10.1002/aic.17937

Dual pore-size sieving in a novel oxygenate-pillared microporous adsorbent for C6 alkane isomers separation

Yun Su, Rundao Chen, Peixin Zhang, Xiao He, Xing Liu, Yuan Liu, Hanting Xiong, Zhiwei Zhao, Junhui Luo, Jingwen Chen, Shixia Chen, Zeling Zeng, Zongbi Bao, Shuguang Deng, Jun Wang

Engineering, Ira A. Fulton Schools of (IAFSE)

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

2 Scopus citations

Abstract

Adsorbents executing molecular sieving mechanisms for the efficient separation of n-hexane (C6) alkane isomers require delicate pore size control, but afford unsatisfactory single-component separations according to their branch degrees. Herein, we report a novel oxygenate-pillared microporous adsorbent, MoOFOUR-Co-tpb, ([Co(tpb)₂MoO₄], tpb = 1,2,4,5-tetra(pyridin-4-yl) benzene), with three gourd-shaped channels for dual pore-size sieving of C6 isomers. In particular, MoOFOUR-Co-tpb excludes 2,2-dimethylbutane, while 3-methylpentane (3MP) can enter one channel showing a high uptake of 82.6 mg g⁻¹, contrasting to the n-hexane (nHEX) adsorption by two channels (136 mg g⁻¹). This dual pore-size control strategy renders a record high equilibrium–kinetic combined selectivity for nHEX/3MP (30.2). Moreover, three- and five-component breakthrough experiments confirm the practical separation performances and cycling stability. Multiple theoretical simulations reveal the separation mechanism and adsorption sites.

Original language	English (US)
Article number	e17937
Journal	AIChE Journal
Volume	69
Issue number	3
DOIs	https://doi.org/10.1002/aic.17937
State	Published - Mar 2023

Keywords

C6 alkanes
adsorptive separation
equilibrium–kinetic effect
metal–organic framework
molecular sieving

ASJC Scopus subject areas

Biotechnology
Environmental Engineering
Chemical Engineering(all)

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10.1002/aic.17937

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@article{eef431606c1844308772608d013f2b0c,

title = "Dual pore-size sieving in a novel oxygenate-pillared microporous adsorbent for C6 alkane isomers separation",

abstract = "Adsorbents executing molecular sieving mechanisms for the efficient separation of n-hexane (C6) alkane isomers require delicate pore size control, but afford unsatisfactory single-component separations according to their branch degrees. Herein, we report a novel oxygenate-pillared microporous adsorbent, MoOFOUR-Co-tpb, ([Co(tpb)2MoO4], tpb = 1,2,4,5-tetra(pyridin-4-yl) benzene), with three gourd-shaped channels for dual pore-size sieving of C6 isomers. In particular, MoOFOUR-Co-tpb excludes 2,2-dimethylbutane, while 3-methylpentane (3MP) can enter one channel showing a high uptake of 82.6 mg g−1, contrasting to the n-hexane (nHEX) adsorption by two channels (136 mg g−1). This dual pore-size control strategy renders a record high equilibrium–kinetic combined selectivity for nHEX/3MP (30.2). Moreover, three- and five-component breakthrough experiments confirm the practical separation performances and cycling stability. Multiple theoretical simulations reveal the separation mechanism and adsorption sites.",

keywords = "C6 alkanes, adsorptive separation, equilibrium–kinetic effect, metal–organic framework, molecular sieving",

author = "Yun Su and Rundao Chen and Peixin Zhang and Xiao He and Xing Liu and Yuan Liu and Hanting Xiong and Zhiwei Zhao and Junhui Luo and Jingwen Chen and Shixia Chen and Zeling Zeng and Zongbi Bao and Shuguang Deng and Jun Wang",

note = "Funding Information: This study was supported by the National Natural Science Foundation of China (Nos. 21908090, 22008099, 22008101, 22108243, and 22168023). Funding Information: National Natural Science Foundation of China, Grant/Award Numbers: 21908090, 22008099, 22008101, 22108243, 22168023 Funding information Publisher Copyright: {\textcopyright} 2022 American Institute of Chemical Engineers.",

year = "2023",

month = mar,

doi = "10.1002/aic.17937",

language = "English (US)",

volume = "69",

journal = "AIChE Journal",

issn = "0001-1541",

publisher = "American Institute of Chemical Engineers",

number = "3",

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TY - JOUR

T1 - Dual pore-size sieving in a novel oxygenate-pillared microporous adsorbent for C6 alkane isomers separation

AU - Su, Yun

AU - Chen, Rundao

AU - Zhang, Peixin

AU - He, Xiao

AU - Liu, Xing

AU - Liu, Yuan

AU - Xiong, Hanting

AU - Zhao, Zhiwei

AU - Luo, Junhui

AU - Chen, Jingwen

AU - Chen, Shixia

AU - Zeng, Zeling

AU - Bao, Zongbi

AU - Deng, Shuguang

AU - Wang, Jun

N1 - Funding Information: This study was supported by the National Natural Science Foundation of China (Nos. 21908090, 22008099, 22008101, 22108243, and 22168023). Funding Information: National Natural Science Foundation of China, Grant/Award Numbers: 21908090, 22008099, 22008101, 22108243, 22168023 Funding information Publisher Copyright: © 2022 American Institute of Chemical Engineers.

PY - 2023/3

Y1 - 2023/3

N2 - Adsorbents executing molecular sieving mechanisms for the efficient separation of n-hexane (C6) alkane isomers require delicate pore size control, but afford unsatisfactory single-component separations according to their branch degrees. Herein, we report a novel oxygenate-pillared microporous adsorbent, MoOFOUR-Co-tpb, ([Co(tpb)2MoO4], tpb = 1,2,4,5-tetra(pyridin-4-yl) benzene), with three gourd-shaped channels for dual pore-size sieving of C6 isomers. In particular, MoOFOUR-Co-tpb excludes 2,2-dimethylbutane, while 3-methylpentane (3MP) can enter one channel showing a high uptake of 82.6 mg g−1, contrasting to the n-hexane (nHEX) adsorption by two channels (136 mg g−1). This dual pore-size control strategy renders a record high equilibrium–kinetic combined selectivity for nHEX/3MP (30.2). Moreover, three- and five-component breakthrough experiments confirm the practical separation performances and cycling stability. Multiple theoretical simulations reveal the separation mechanism and adsorption sites.

AB - Adsorbents executing molecular sieving mechanisms for the efficient separation of n-hexane (C6) alkane isomers require delicate pore size control, but afford unsatisfactory single-component separations according to their branch degrees. Herein, we report a novel oxygenate-pillared microporous adsorbent, MoOFOUR-Co-tpb, ([Co(tpb)2MoO4], tpb = 1,2,4,5-tetra(pyridin-4-yl) benzene), with three gourd-shaped channels for dual pore-size sieving of C6 isomers. In particular, MoOFOUR-Co-tpb excludes 2,2-dimethylbutane, while 3-methylpentane (3MP) can enter one channel showing a high uptake of 82.6 mg g−1, contrasting to the n-hexane (nHEX) adsorption by two channels (136 mg g−1). This dual pore-size control strategy renders a record high equilibrium–kinetic combined selectivity for nHEX/3MP (30.2). Moreover, three- and five-component breakthrough experiments confirm the practical separation performances and cycling stability. Multiple theoretical simulations reveal the separation mechanism and adsorption sites.

KW - C6 alkanes

KW - adsorptive separation

KW - equilibrium–kinetic effect

KW - metal–organic framework

KW - molecular sieving

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DO - 10.1002/aic.17937

M3 - Article

AN - SCOPUS:85141345194

SN - 0001-1541

VL - 69

JO - AIChE Journal

JF - AIChE Journal

IS - 3

M1 - e17937

ER -

Dual pore-size sieving in a novel oxygenate-pillared microporous adsorbent for C6 alkane isomers separation

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