English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/170940
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 | DATACITE
Exportar a otros formatos:


Low-cost hierarchical micro/macroporous carbon foams as efficient sorbents for CO2 capture

AuthorsRodríguez Vázquez, Elena CSIC ORCID ; García Fernández, Roberto
KeywordsCarbon foams
Carbon dioxide
Chemical activation
Issue Date16-Sep-2016
CitationFuel Processing Technology 156: 235-245 (2017)
AbstractHierarchical coal-based carbon foams with a low production cost and a high carbon yield have been synthesised using ZnCl2 and KOH as activation agents and tested as adsorbents for CO2, and a relation has been established between CO2 uptake and their textural and chemical properties. The foams showed a porous structure consisting of macropores in the range of 100–10 μm, a surface area of 534–866 m2 g− 1 and a total micropore volume of 0.21–0.25 cm3 g− 1. The foams activated with ZnCl2 at 500 °C, which displayed a homogeneous microporosity in the range of 0.8–1.2 nm, showed moderate values of CO2 uptake, ranging from 1.6 to 2.1 mmol g− 1. The CO2 adsorption capacity of the foams prepared by KOH activation was as high as 2.8 mmol g− 1, as a result of their higher proportion of narrow micropores (< 0.7 nm). This value is superior to those attained by commercial activated carbons and the highest ever reported for carbon foams. Regarding the chemical surface, the presence of acidic functionalities reduced the uptake of CO2. The foam prepared with a low coal/KOH ratio (0.5) showed a very good selectivity for CO2 adsorption over N2, a low regeneration energy expenditure and a good recyclability.
Publisher version (URL)https://doi.org/10.1016/j.fuproc.2016.09.002
Appears in Collections:(INCAR) Artículos
Files in This Item:
File Description SizeFormat 
Low-cost_carbon _foams_Rodriguez.pdf1,26 MBAdobe PDFThumbnail
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.