Journal
APPLIED SURFACE SCIENCE
Volume 254, Issue 22, Pages 7165-7172Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2008.05.239
Keywords
activated carbon; surface modification; thermal analysis; CO2 capture; adsorption
Categories
Funding
- Spanish MEC [CTM2005-03075/TECNO]
- CSIC 13P Program
- European Social Fund
- Plan Regional de Investigacion del Principado de Asturias
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The reduction of anthropogenic CO2 emissions to address the consequences of climate change is a matter of concern for all developed countries. In the short term, one of the most viable options for reducing carbon emissions is to capture and store CO2 at large stationary sources. Adsorption with solid sorbents is one of the most promising options. In this work, two series of materials were prepared from two commercial activated carbons, C and R, by heat treatment with gaseous ammonia at temperatures in the 200-800 degrees C range. The aim was to improve the selectivity and capacity of the sorbents to capture CO2, by introducing basic nitrogen-functionalities into the carbons. The sorbents were characterised in terms of texture and chemical composition. Their surface chemistry was studied through temperature-programmed desorption tests and X-ray photoelectron spectroscopy. The capture performance of the carbons was evaluated by using a thermogravimetric analyser to record mass uptakes by the samples when exposed to a CO2 atmosphere. (C) 2008 Elsevier B.V. All rights reserved.
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