Direct air capture of CO2 by KOH-activated bamboo biochar

Chen Zhang; Shuzhuang Sun; Su He; Chunfei Wu

doi:10.1016/j.joei.2022.10.017

Direct air capture of CO₂ by KOH-activated bamboo biochar

Chen Zhang, Shuzhuang Sun, Su He, Chunfei Wu^*

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

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

1 Citation (Scopus)

12 Downloads (Pure)

Abstract

Direct air capture (DAC) of CO₂ is considered one of the most promising carbon capture methods to reduce ambient CO₂ concentration for climate change mitigation. Biochar represents an attractive adsorbent for DAC because it is environmentally friendly and cost-effective. In this work, KOH-activated bamboo biochar shows the CO₂ capture capacity of 3.49 mmol g⁻¹ (25 °C, 1 bar), and it is used as an adsorbent to perform direct air capture using a fixed-bed reactor with an ambient CO₂ capture capacity of up to 51.74 μmol g⁻¹. Furthermore, the effect of relative humidity on CO₂ adsorption by biochar was investigated and exhibited promising stability under 2.7% relative humidity. However, the biochar activity for CO₂ capture is reduced to 63.88% under 67.1% humidity after 50 cycles.

Original language	English
Pages (from-to)	399-405
Number of pages	7
Journal	Journal of the Energy Institute
Volume	105
Early online date	03 Nov 2022
DOIs	https://doi.org/10.1016/j.joei.2022.10.017
Publication status	Published - Dec 2022

Bibliographical note

Funding Information:
This project was supported by the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 823745 .

Publisher Copyright:
© 2022 The Authors

Keywords

Bamboo
Biochar
Direct air capture
Relative humidity
Sorbent stability

ASJC Scopus subject areas

Control and Systems Engineering
Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

UN SDGs

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

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Direct air capture of CO2 by KOH-activated bamboo biochar
Copyright 2022 The Authors. This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
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Cite this

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title = "Direct air capture of CO2 by KOH-activated bamboo biochar",

abstract = "Direct air capture (DAC) of CO2 is considered one of the most promising carbon capture methods to reduce ambient CO2 concentration for climate change mitigation. Biochar represents an attractive adsorbent for DAC because it is environmentally friendly and cost-effective. In this work, KOH-activated bamboo biochar shows the CO2 capture capacity of 3.49 mmol g−1 (25 °C, 1 bar), and it is used as an adsorbent to perform direct air capture using a fixed-bed reactor with an ambient CO2 capture capacity of up to 51.74 μmol g−1. Furthermore, the effect of relative humidity on CO2 adsorption by biochar was investigated and exhibited promising stability under 2.7% relative humidity. However, the biochar activity for CO2 capture is reduced to 63.88% under 67.1% humidity after 50 cycles.",

keywords = "Bamboo, Biochar, Direct air capture, Relative humidity, Sorbent stability",

author = "Chen Zhang and Shuzhuang Sun and Su He and Chunfei Wu",

note = "Funding Information: This project was supported by the European Union's Horizon 2020 research and innovation programme under the Marie Sk{\l}odowska-Curie grant agreement No. 823745 . Publisher Copyright: {\textcopyright} 2022 The Authors",

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doi = "10.1016/j.joei.2022.10.017",

language = "English",

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AU - Zhang, Chen

AU - Sun, Shuzhuang

AU - He, Su

AU - Wu, Chunfei

N1 - Funding Information: This project was supported by the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 823745 . Publisher Copyright: © 2022 The Authors

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AB - Direct air capture (DAC) of CO2 is considered one of the most promising carbon capture methods to reduce ambient CO2 concentration for climate change mitigation. Biochar represents an attractive adsorbent for DAC because it is environmentally friendly and cost-effective. In this work, KOH-activated bamboo biochar shows the CO2 capture capacity of 3.49 mmol g−1 (25 °C, 1 bar), and it is used as an adsorbent to perform direct air capture using a fixed-bed reactor with an ambient CO2 capture capacity of up to 51.74 μmol g−1. Furthermore, the effect of relative humidity on CO2 adsorption by biochar was investigated and exhibited promising stability under 2.7% relative humidity. However, the biochar activity for CO2 capture is reduced to 63.88% under 67.1% humidity after 50 cycles.

KW - Bamboo

KW - Biochar

KW - Direct air capture

KW - Relative humidity

KW - Sorbent stability

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DO - 10.1016/j.joei.2022.10.017

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