Breaking trade-off effect of Xe/Kr separation on microporous and heteroatoms-rich carbon adsorbents

Zhenning Deng; Yi Liu; Mingwei Wan; Shengya Ge; Zhiwei Zhao; Jingwen Chen; Shixia Chen; Shuguang Deng; Jun Wang

doi:10.1016/j.seppur.2022.122942

Breaking trade-off effect of Xe/Kr separation on microporous and heteroatoms-rich carbon adsorbents

Zhenning Deng, Yi Liu, Mingwei Wan, Shengya Ge, Zhiwei Zhao, Jingwen Chen, Shixia Chen, Shuguang Deng, Jun Wang

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

8 Scopus citations

Abstract

Energy-efficient adsorptive separation of xenon (Xe) and krypton (Kr) based on stable carbon adsorbents is a promising technology. Developing high-capacity adsorbents with excellent selectivity remains a significant challenge. Herein, we report Chlorella-derived heteroatoms-rich microporous carbons with suitable micropore sizes comparable to the kinetic diameter of Xe for highly efficient Xe/Kr separation. The optimized porous carbon, CK-700-1, exhibits high binding affinity for more polarizable Xe, which breaks the trade-off effect by showing benchmark Xe adsorption capacity (5.84 mmol g⁻¹) and excellent Xe/Kr selectivity (13.4) at 298 K and 1.0 bar. Dynamic breakthrough experiments further confirm its practical feasibility for Xe/Kr separation even under low-concentration and humid conditions with excellent cyclability.

Original language	English (US)
Article number	122942
Journal	Separation and Purification Technology
Volume	308
DOIs	https://doi.org/10.1016/j.seppur.2022.122942
State	Published - Mar 1 2023

Keywords

Carbon
Microporous adsorbents
Rich heteroatoms
UNF off-gas
Xe/Kr separation

ASJC Scopus subject areas

Analytical Chemistry
Filtration and Separation

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title = "Breaking trade-off effect of Xe/Kr separation on microporous and heteroatoms-rich carbon adsorbents",

abstract = "Energy-efficient adsorptive separation of xenon (Xe) and krypton (Kr) based on stable carbon adsorbents is a promising technology. Developing high-capacity adsorbents with excellent selectivity remains a significant challenge. Herein, we report Chlorella-derived heteroatoms-rich microporous carbons with suitable micropore sizes comparable to the kinetic diameter of Xe for highly efficient Xe/Kr separation. The optimized porous carbon, CK-700-1, exhibits high binding affinity for more polarizable Xe, which breaks the trade-off effect by showing benchmark Xe adsorption capacity (5.84 mmol g−1) and excellent Xe/Kr selectivity (13.4) at 298 K and 1.0 bar. Dynamic breakthrough experiments further confirm its practical feasibility for Xe/Kr separation even under low-concentration and humid conditions with excellent cyclability.",

keywords = "Carbon, Microporous adsorbents, Rich heteroatoms, UNF off-gas, Xe/Kr separation",

author = "Zhenning Deng and Yi Liu and Mingwei Wan and Shengya Ge and Zhiwei Zhao and Jingwen Chen and Shixia Chen and Shuguang Deng and Jun Wang",

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year = "2023",

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doi = "10.1016/j.seppur.2022.122942",

language = "English (US)",

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T1 - Breaking trade-off effect of Xe/Kr separation on microporous and heteroatoms-rich carbon adsorbents

AU - Deng, Zhenning

AU - Liu, Yi

AU - Wan, Mingwei

AU - Ge, Shengya

AU - Zhao, Zhiwei

AU - Chen, Jingwen

AU - Chen, Shixia

AU - Deng, Shuguang

AU - Wang, Jun

PY - 2023/3/1

Y1 - 2023/3/1

N2 - Energy-efficient adsorptive separation of xenon (Xe) and krypton (Kr) based on stable carbon adsorbents is a promising technology. Developing high-capacity adsorbents with excellent selectivity remains a significant challenge. Herein, we report Chlorella-derived heteroatoms-rich microporous carbons with suitable micropore sizes comparable to the kinetic diameter of Xe for highly efficient Xe/Kr separation. The optimized porous carbon, CK-700-1, exhibits high binding affinity for more polarizable Xe, which breaks the trade-off effect by showing benchmark Xe adsorption capacity (5.84 mmol g−1) and excellent Xe/Kr selectivity (13.4) at 298 K and 1.0 bar. Dynamic breakthrough experiments further confirm its practical feasibility for Xe/Kr separation even under low-concentration and humid conditions with excellent cyclability.

AB - Energy-efficient adsorptive separation of xenon (Xe) and krypton (Kr) based on stable carbon adsorbents is a promising technology. Developing high-capacity adsorbents with excellent selectivity remains a significant challenge. Herein, we report Chlorella-derived heteroatoms-rich microporous carbons with suitable micropore sizes comparable to the kinetic diameter of Xe for highly efficient Xe/Kr separation. The optimized porous carbon, CK-700-1, exhibits high binding affinity for more polarizable Xe, which breaks the trade-off effect by showing benchmark Xe adsorption capacity (5.84 mmol g−1) and excellent Xe/Kr selectivity (13.4) at 298 K and 1.0 bar. Dynamic breakthrough experiments further confirm its practical feasibility for Xe/Kr separation even under low-concentration and humid conditions with excellent cyclability.

KW - Carbon

KW - Microporous adsorbents

KW - Rich heteroatoms

KW - UNF off-gas

KW - Xe/Kr separation

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U2 - 10.1016/j.seppur.2022.122942

DO - 10.1016/j.seppur.2022.122942

M3 - Article

AN - SCOPUS:85144339293

SN - 1383-5866

VL - 308

JO - Separation and Purification Technology

JF - Separation and Purification Technology

M1 - 122942

ER -

Breaking trade-off effect of Xe/Kr separation on microporous and heteroatoms-rich carbon adsorbents

Abstract

Keywords

ASJC Scopus subject areas

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