Highly selective CO2separation from a CO2/C2H2mixture using a diamine-appended metal-organic framework

Doo San Choi; Dae Won Kim; Dong Won Kang; Minjung Kang; Yun Seok Chae; Chang Seop Hong

doi:10.1039/d1ta05869j

Highly selective CO₂separation from a CO₂/C₂H₂mixture using a diamine-appended metal-organic framework

Doo San Choi, Dae Won Kim, Dong Won Kang, Minjung Kang, Yun Seok Chae, Chang Seop Hong

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

31 Citations (Scopus)

Abstract

The effective separation of carbon dioxide (CO₂) from acetylene (C₂H₂) in a gas mixture (CO₂/C₂H₂) during the purification process is an important industrial demand since C₂H₂is widely used in chemical products but is challenging due to the similar physicochemical properties of both gases. Herein, we report highly selective chemisorptive CO₂/C₂H₂separation using diamine-appended metal-organic frameworks (MOFs) with strong acid-base interactions between CO₂and amine groups, enabling specific recognition of CO₂over C₂H₂. These functionalized MOFs exhibited preferential uptake of CO₂over C₂H₂at 298 K and 1 bar. They showed the highest CO₂adsorption capacities (3.58-3.82 mmol g⁻¹) at 30 mbar, which is the partial pressure of CO₂during the C₂H₂purification process. Furthermore, the adsorption selectivity and recyclability of these MOFs for CO₂over C₂H₂in the gas mixture were verified by dynamic breakthrough experiments. This work demonstrates that diamine-appended MOFs are promising adsorbents to produce high-purity C₂H₂by means of selective capture of CO₂from a CO₂/C₂H₂mixture.

Original language	English
Pages (from-to)	21424-21428
Number of pages	5
Journal	Journal of Materials Chemistry A
Volume	9
Issue number	37
DOIs	https://doi.org/10.1039/d1ta05869j
Publication status	Published - 2021 Oct 7

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2021R1A2B5B03086313) and the Priority Research Centers Program (NRF-2019R1A6A1A11044070). We thank the Institute for Basic Science (IBS) Center for Molecular Spectroscopy and Dynamics (IBS-R023-D1) for providing NMR spectrometry and professional technical support.

Publisher Copyright:
© The Royal Society of Chemistry 2021.

ASJC Scopus subject areas

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

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This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1039/d1ta05869j

Cite this

@article{4f78f67624834d2e9f34617b8ce7518a,

title = "Highly selective CO2separation from a CO2/C2H2mixture using a diamine-appended metal-organic framework",

abstract = "The effective separation of carbon dioxide (CO2) from acetylene (C2H2) in a gas mixture (CO2/C2H2) during the purification process is an important industrial demand since C2H2is widely used in chemical products but is challenging due to the similar physicochemical properties of both gases. Herein, we report highly selective chemisorptive CO2/C2H2separation using diamine-appended metal-organic frameworks (MOFs) with strong acid-base interactions between CO2and amine groups, enabling specific recognition of CO2over C2H2. These functionalized MOFs exhibited preferential uptake of CO2over C2H2at 298 K and 1 bar. They showed the highest CO2adsorption capacities (3.58-3.82 mmol g−1) at 30 mbar, which is the partial pressure of CO2during the C2H2purification process. Furthermore, the adsorption selectivity and recyclability of these MOFs for CO2over C2H2in the gas mixture were verified by dynamic breakthrough experiments. This work demonstrates that diamine-appended MOFs are promising adsorbents to produce high-purity C2H2by means of selective capture of CO2from a CO2/C2H2mixture.",

author = "Choi, {Doo San} and Kim, {Dae Won} and Kang, {Dong Won} and Minjung Kang and Chae, {Yun Seok} and Hong, {Chang Seop}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2021R1A2B5B03086313) and the Priority Research Centers Program (NRF-2019R1A6A1A11044070). We thank the Institute for Basic Science (IBS) Center for Molecular Spectroscopy and Dynamics (IBS-R023-D1) for providing NMR spectrometry and professional technical support. Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2021.",

year = "2021",

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AU - Choi, Doo San

AU - Kim, Dae Won

AU - Kang, Dong Won

AU - Kang, Minjung

AU - Chae, Yun Seok

AU - Hong, Chang Seop

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2021R1A2B5B03086313) and the Priority Research Centers Program (NRF-2019R1A6A1A11044070). We thank the Institute for Basic Science (IBS) Center for Molecular Spectroscopy and Dynamics (IBS-R023-D1) for providing NMR spectrometry and professional technical support. Publisher Copyright: © The Royal Society of Chemistry 2021.

PY - 2021/10/7

Y1 - 2021/10/7

N2 - The effective separation of carbon dioxide (CO2) from acetylene (C2H2) in a gas mixture (CO2/C2H2) during the purification process is an important industrial demand since C2H2is widely used in chemical products but is challenging due to the similar physicochemical properties of both gases. Herein, we report highly selective chemisorptive CO2/C2H2separation using diamine-appended metal-organic frameworks (MOFs) with strong acid-base interactions between CO2and amine groups, enabling specific recognition of CO2over C2H2. These functionalized MOFs exhibited preferential uptake of CO2over C2H2at 298 K and 1 bar. They showed the highest CO2adsorption capacities (3.58-3.82 mmol g−1) at 30 mbar, which is the partial pressure of CO2during the C2H2purification process. Furthermore, the adsorption selectivity and recyclability of these MOFs for CO2over C2H2in the gas mixture were verified by dynamic breakthrough experiments. This work demonstrates that diamine-appended MOFs are promising adsorbents to produce high-purity C2H2by means of selective capture of CO2from a CO2/C2H2mixture.

AB - The effective separation of carbon dioxide (CO2) from acetylene (C2H2) in a gas mixture (CO2/C2H2) during the purification process is an important industrial demand since C2H2is widely used in chemical products but is challenging due to the similar physicochemical properties of both gases. Herein, we report highly selective chemisorptive CO2/C2H2separation using diamine-appended metal-organic frameworks (MOFs) with strong acid-base interactions between CO2and amine groups, enabling specific recognition of CO2over C2H2. These functionalized MOFs exhibited preferential uptake of CO2over C2H2at 298 K and 1 bar. They showed the highest CO2adsorption capacities (3.58-3.82 mmol g−1) at 30 mbar, which is the partial pressure of CO2during the C2H2purification process. Furthermore, the adsorption selectivity and recyclability of these MOFs for CO2over C2H2in the gas mixture were verified by dynamic breakthrough experiments. This work demonstrates that diamine-appended MOFs are promising adsorbents to produce high-purity C2H2by means of selective capture of CO2from a CO2/C2H2mixture.

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