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Título : Unburnt carbon from coal fly ashes as a precursos of activated carbon for nitric oxide removal
Autor : Rubio Villa, Begoña; Izquierdo Pantoja, María Teresa
Palabras clave : Coal fly ash
Activated Carbon
NO removal
Fecha de publicación : 2007
Editor: Elsevier
Resumen: The aim of this work is to evaluate the characteristics of an activated carbon obtained from unburnt carbon in coal fly ashes to be used in the removal of NO. Carbon-rich fraction was obtained by mechanical sieving of fly ashes. The mineral matter was removed by conventional HCl and HF desmineralization procedure. Activation was carried out with steam at 900ºC in order to develop porosity onto the sample. Characterization of samples was performed by several techniques with a main objective: to follow the mineral matter content, composition and distribution on the samples in order to better understand how to remove it from unburnt carbon in fly ashes. To study the use of this unburnt carbon as a precursor for the preparation of activated carbons for gas cleaning, the NO removal by ammonia using activated carbon as a catalyst at low temperature was performed. Results show a good performance of activated carbon in this reaction that is in relationship with BET surface area.
URI : http://hdl.handle.net/10261/4206
DOI: 10.1016/j.jhazmat.2006.09.074
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