Super-activated CNB for CO2 capture: The development of the nitrogen containing porous carbon by chlorination and post KOH-activation

•Nanoporous boron and nitrogen co-doped carbon (CNB) having high oxidation stability.•Simultaneous increase in micropore volume and nitrogen content of CNB by activation.•Activated CNB exhibiting outstanding CO2 capturing capacity among carbon materials.•The need for improving CO2 uptakes per unit m...

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Bibliographic Details
Published in:Journal of alloys and compounds 2021-04, Vol.861, p.158358, Article 158358
Main Authors: Ha, Daegwon, Lee, Hyunjae, Han, Jisun, Kim, Jinhong
Format: Article
Language:English
Subjects:
Activated carbon
Activation
Ambient temperature
Boron
Boron and nitrogen co-doped carbon
Carbon dioxide
Carbon sequestration
Carbonitride-derived carbon
Chlorination
CO2 adsorption
Functional groups
Hierarchical structure
Nitrogen
Oxidation
Porous materials
Selectivity
Titanium carbonitride
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Summary:•Nanoporous boron and nitrogen co-doped carbon (CNB) having high oxidation stability.•Simultaneous increase in micropore volume and nitrogen content of CNB by activation.•Activated CNB exhibiting outstanding CO2 capturing capacity among carbon materials.•The need for improving CO2 uptakes per unit micropore volume in carbonous adsorbent. [Display omitted] Minimization of carbon dioxide (CO2) emissions into the atmosphere is a prerequisite to solving climate change. Tremendous research has been conducted to capture the CO2 from pre- and post-combustion using nanoporous materials. Nitrogen-doped porous carbon is one of the most promising CO2 adsorbents. Achieving high nitrogen content and high micropore volume is essential to CO2 adsorption properties. In this study, super activated nitrogen and boron co-doped porous carbons (K-CNBs) are successfully synthesized by the chlorination and the subsequent KOH chemical activation. Nitrogen and boron co-doped porous carbons (CNBs) are synthesized by the chlorination of titanium carbonitride and boride mixture. CNBs good thermal and oxidation stability that induces an increase in the nitrogen content as well as an increase in the micropore volume even after the activation. K-CNBs, having both high micropore volume and abundant pyridonic-N functional group, show superior CO2 uptake at ambient temperature at atmospheric pressure with excellent CO2/N2 selectivity. K-CNBs are the best CO2 capturer among the nitrogen-containing carbon materials, reaching the threshold of CO2 uptakes performance.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2020.158358