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

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

14 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
General Chemical Engineering

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10.1002/aic.17937

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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",

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year = "2023",

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doi = "10.1002/aic.17937",

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volume = "69",

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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

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

Abstract

Keywords

ASJC Scopus subject areas

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CCDC 2072716: Experimental Crystal Structure Determination

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

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

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Datasets

CCDC 2072716: Experimental Crystal Structure Determination

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