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Surface modification of activated carbons for CO2 capture

AutorPevida García, Covadonga ; González Plaza, Marta ; Arias Rozada, Borja ; Fermoso Domínguez, Javier ; Rubiera González, Fernando ; Pis Martínez, José Juan
Palabras claveActivated Carbon
Surface modification
Thermal analysis
CO2 capture
Fecha de publicación18-may-2008
CitaciónApplied Surface Science 254(22): 7165-7172 (2008)
ResumenThe 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°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.
Descripción8 pages, 6 figures, 4 tables.-- Printed version published on Sep 15, 2008.
Versión del editorhttp://dx.doi.org/10.1016/j.apsusc.2008.05.239
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