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Direct air capture of CO2 by KOH-activated bamboo biochar.
- Source :
- Journal of the Energy Institute (Elsevier Science); Dec2022, Vol. 105, p399-405, 7p
- Publication Year :
- 2022
-
Abstract
- Direct air capture (DAC) of CO 2 is considered one of the most promising carbon capture methods to reduce ambient CO 2 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 CO 2 capture capacity of 3.49 mmol g<superscript>−1</superscript> (25 °C, 1 bar), and it is used as an adsorbent to perform direct air capture using a fixed-bed reactor with an ambient CO 2 capture capacity of up to 51.74 μmol g<superscript>−1</superscript>. Furthermore, the effect of relative humidity on CO 2 adsorption by biochar was investigated and exhibited promising stability under 2.7% relative humidity. However, the biochar activity for CO 2 capture is reduced to 63.88% under 67.1% humidity after 50 cycles. [Display omitted] • KOH was used to activate bamboo-derived biochar. • Bamboo biochar was investigated in direct air capture of CO 2. • Gas selectivity of biochar during direct air capture. • Effect of relative humidity on direct air capture efficiency. [ABSTRACT FROM AUTHOR]
- Subjects :
- CARBON sequestration
BIOCHAR
BAMBOO
CLIMATE change mitigation
HUMIDITY
CARBON dioxide
Subjects
Details
- Language :
- English
- ISSN :
- 17439671
- Volume :
- 105
- Database :
- Complementary Index
- Journal :
- Journal of the Energy Institute (Elsevier Science)
- Publication Type :
- Academic Journal
- Accession number :
- 160539169
- Full Text :
- https://doi.org/10.1016/j.joei.2022.10.017