English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/164894
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Standing out the key role of ultramicroporosity to tailor biomass-derived carbons for CO2 capture

AuthorsQuerejeta Montes, Nausika ; Gil Matellanes, María Victoria ; Pevida García, Covadonga ; Álvarez Centeno, Teresa
KeywordsCO2 capture
Adsorption
Ultramicroporosity
Activated carbon
Biomass waste
Issue Date26-Apr-2018
PublisherElsevier
CitationJournal of CO2 Utilization 26: 1-7 (2018)
AbstractThe successful tailoring of the ultramicroporosity remarkably increases the CO2 uptake capacity of low cost-carbons derived by a simple one-pot physical activation of olive stones, coffee grounds, almond shells and grape seeds. A porous network dominated by ∼40–46% of ultramicropores below 0.5 nm and no significant presence of pores above 0.7 nm boosts the CO2 uptake at 1 bar and 298 K around 40% compared to materials with similar micropore volume. A slight ultramicropore widening causes the drop to a standard pattern that depends mainly on the micropore volume. The detailed analysis of the CO2 isotherms within the Dubinin´s theory provides simple clues for the optimization of carbons for CO2 capture at ambient temperature and atmospheric pressure. Thus, a general pattern of around 7.2 mmol of CO2 captured per cm3 of ultramicropores is found for a variety of activated carbons and carbide derived-carbons with characteristic energy Eo of 29–22 kJ/mol. This feature is typical of materials with average micropore sizes from 0.65 to 1 nm. An enhancement of up to 10 mmol CO2/cm3 is achieved by carbons with Eo ranging between 30 and 32 kJ/mol which correlates with an extremely homogeneous porosity with average dimensions around 0.5 nm. The excellent fit of the present carbons into general patterns exclusively based on the textural features reveals no significant influence of their surface functionalities on the CO2 adsorption performance.
Publisher version (URL)https://doi.org/10.1016/j.jcou.2018.04.016
URIhttp://hdl.handle.net/10261/164894
DOI10.1016/j.jcou.2018.04.016
E-ISSN2212-9820
Appears in Collections:(INCAR) Artículos
Files in This Item:
File Description SizeFormat 
Standing_out_Key_Querejeta_2018.pdf991,05 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.