Nano-encapsulated solvent via pickering emulsion in NaOH aqueous solution for indoor CO2 capture

Seonggon Kim; Minjae Kim; Ronghuan Xu; Jong Ha Park; Jae Won Lee; Yong Tae Kang

doi:10.1016/j.jcou.2021.101637

Nano-encapsulated solvent via pickering emulsion in NaOH aqueous solution for indoor CO₂ capture

Seonggon Kim, Minjae Kim, Ronghuan Xu, Jong Ha Park, Jae Won Lee, Yong Tae Kang

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

12 Citations (Scopus)

Abstract

Considering the limitations of indoor ventilation owing to air pollution, CO₂ concentration rises rapidly to 3000 ppm, which is a level that can affect human health. It is essential to develop materials to reduce naturally occurring CO₂ in the buildings. Herein, a nano-encapsulated solvent (NES) via Pickering emulsion is proposed for indoor CO₂ capture. NaOH aqueous solution is wrapped with hydrophobic surface-functionalized SiO₂ (HS-SiO₂) nanoparticles, and the corrosiveness of NaOH is not caused by HS-SiO₂ wall. CO₂ capture capacity of NES-NaOH is evaluated as 7.57 mmol-CO₂/g-solvent which is the highest compared to other solvents including metal-organic frameworks (MOFs); it exhibits excellent structural stability in terms of temperature, time, moisture, and CO₂ reaction. NES-NaOH presents high selectivity toward CO₂ molecules due to the characteristics of NaOH with high gas permeability of macroporous silica wall and it is dispersed in a silicone oil harmless to human body. It is concluded that NES-NaOH can be successfully applied to air purifier filter to control the CO₂ concentration in buildings.

Original language	English
Article number	101637
Journal	Journal of CO2 Utilization
Volume	51
DOIs	https://doi.org/10.1016/j.jcou.2021.101637
Publication status	Published - 2021 Sept

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (Grant number: 2019R1A2B5B03069991 and No. 2020R1A5A118153 ).

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

CO capture filter
Indoor CO capture
NaOH aqueous solution
Nano-encapsulated solvent
Pickering emulsion

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Waste Management and Disposal
Process Chemistry and Technology

UN SDGs

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

Access to Document

10.1016/j.jcou.2021.101637

Cite this

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title = "Nano-encapsulated solvent via pickering emulsion in NaOH aqueous solution for indoor CO2 capture",

abstract = "Considering the limitations of indoor ventilation owing to air pollution, CO2 concentration rises rapidly to 3000 ppm, which is a level that can affect human health. It is essential to develop materials to reduce naturally occurring CO2 in the buildings. Herein, a nano-encapsulated solvent (NES) via Pickering emulsion is proposed for indoor CO2 capture. NaOH aqueous solution is wrapped with hydrophobic surface-functionalized SiO2 (HS-SiO2) nanoparticles, and the corrosiveness of NaOH is not caused by HS-SiO2 wall. CO2 capture capacity of NES-NaOH is evaluated as 7.57 mmol-CO2/g-solvent which is the highest compared to other solvents including metal-organic frameworks (MOFs); it exhibits excellent structural stability in terms of temperature, time, moisture, and CO2 reaction. NES-NaOH presents high selectivity toward CO2 molecules due to the characteristics of NaOH with high gas permeability of macroporous silica wall and it is dispersed in a silicone oil harmless to human body. It is concluded that NES-NaOH can be successfully applied to air purifier filter to control the CO2 concentration in buildings.",

keywords = "CO capture filter, Indoor CO capture, NaOH aqueous solution, Nano-encapsulated solvent, Pickering emulsion",

author = "Seonggon Kim and Minjae Kim and Ronghuan Xu and Park, {Jong Ha} and Lee, {Jae Won} and Kang, {Yong Tae}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (Grant number: 2019R1A2B5B03069991 and No. 2020R1A5A118153 ). Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

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T1 - Nano-encapsulated solvent via pickering emulsion in NaOH aqueous solution for indoor CO2 capture

AU - Kim, Seonggon

AU - Kim, Minjae

AU - Xu, Ronghuan

AU - Park, Jong Ha

AU - Lee, Jae Won

AU - Kang, Yong Tae

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (Grant number: 2019R1A2B5B03069991 and No. 2020R1A5A118153 ). Publisher Copyright: © 2021 Elsevier Ltd

PY - 2021/9

Y1 - 2021/9

N2 - Considering the limitations of indoor ventilation owing to air pollution, CO2 concentration rises rapidly to 3000 ppm, which is a level that can affect human health. It is essential to develop materials to reduce naturally occurring CO2 in the buildings. Herein, a nano-encapsulated solvent (NES) via Pickering emulsion is proposed for indoor CO2 capture. NaOH aqueous solution is wrapped with hydrophobic surface-functionalized SiO2 (HS-SiO2) nanoparticles, and the corrosiveness of NaOH is not caused by HS-SiO2 wall. CO2 capture capacity of NES-NaOH is evaluated as 7.57 mmol-CO2/g-solvent which is the highest compared to other solvents including metal-organic frameworks (MOFs); it exhibits excellent structural stability in terms of temperature, time, moisture, and CO2 reaction. NES-NaOH presents high selectivity toward CO2 molecules due to the characteristics of NaOH with high gas permeability of macroporous silica wall and it is dispersed in a silicone oil harmless to human body. It is concluded that NES-NaOH can be successfully applied to air purifier filter to control the CO2 concentration in buildings.

AB - Considering the limitations of indoor ventilation owing to air pollution, CO2 concentration rises rapidly to 3000 ppm, which is a level that can affect human health. It is essential to develop materials to reduce naturally occurring CO2 in the buildings. Herein, a nano-encapsulated solvent (NES) via Pickering emulsion is proposed for indoor CO2 capture. NaOH aqueous solution is wrapped with hydrophobic surface-functionalized SiO2 (HS-SiO2) nanoparticles, and the corrosiveness of NaOH is not caused by HS-SiO2 wall. CO2 capture capacity of NES-NaOH is evaluated as 7.57 mmol-CO2/g-solvent which is the highest compared to other solvents including metal-organic frameworks (MOFs); it exhibits excellent structural stability in terms of temperature, time, moisture, and CO2 reaction. NES-NaOH presents high selectivity toward CO2 molecules due to the characteristics of NaOH with high gas permeability of macroporous silica wall and it is dispersed in a silicone oil harmless to human body. It is concluded that NES-NaOH can be successfully applied to air purifier filter to control the CO2 concentration in buildings.

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KW - Indoor CO capture

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KW - Nano-encapsulated solvent

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