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One-step ethylene production from a four-component gas mixture by a single physisorbent.

ABSTRACT: One-step adsorptive purification of ethylene (C2H4) from four-component gas mixtures comprising acetylene (C2H2), ethylene (C2H4), ethane (C2H6) and carbon dioxide (CO2) is an unmet challenge in the area of commodity purification. Herein, we report that the ultramicroporous sorbent Zn-atz-oba (H2oba = 4,4-dicarboxyl diphenyl ether; Hatz = 3-amino-1,2,4-triazole) enables selective adsorption of C2H2, C2H6 and CO2 over C2H4 thanks to the binding sites that lie in its undulating pores. Molecular simulations provide insight into the binding sites in Zn-atz-oba that are responsible for coadsorption of C2H2, C2H6 and CO2 over C2H4. Dynamic breakthrough experiments demonstrate that the selective binding exhibited by Zn-atz-oba can produce polymer-grade purity (>99.95%) C2H4 from binary (1:1 for C2H4/C2H6), ternary (1:1:1 for C2H2/C2H4/C2H6) and quaternary (1:1:1:1 for C2H2/C2H4/C2H6/CO2) gas mixtures in a single step.

SUBMITTER: Cao JW 

PROVIDER: S-EPMC8586343 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature

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One-step ethylene production from a four-component gas mixture by a single physisorbent.

Cao Jian-Wei JW   Mukherjee Soumya S   Pham Tony T   Wang Yu Y   Wang Teng T   Zhang Tao T   Jiang Xue X   Tang Hui-Juan HJ   Forrest Katherine A KA   Space Brian B   Zaworotko Michael J MJ   Chen Kai-Jie KJ  

Nature communications 20211111 1

One-step adsorptive purification of ethylene (C<sub>2</sub>H<sub>4</sub>) from four-component gas mixtures comprising acetylene (C<sub>2</sub>H<sub>2</sub>), ethylene (C<sub>2</sub>H<sub>4</sub>), ethane (C<sub>2</sub>H<sub>6</sub>) and carbon dioxide (CO<sub>2</sub>) is an unmet challenge in the area of commodity purification. Herein, we report that the ultramicroporous sorbent Zn-atz-oba (H<sub>2</sub>oba = 4,4-dicarboxyl diphenyl ether; Hatz = 3-amino-1,2,4-triazole) enables selective adsorpt  ...[more]

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