Insight into hydroxides-activated coals: chemical or physical activation?
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Título: | Insight into hydroxides-activated coals: chemical or physical activation? |
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Autor/es: | Alcañiz-Monge, Juan | Illán-Gómez, María José |
Grupo/s de investigación o GITE: | Materiales Carbonosos y Medioambiente |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Inorgánica |
Palabras clave: | Activated carbon | Chemical activation | Thermal analysis | Microporosity |
Área/s de conocimiento: | Química Inorgánica |
Fecha de publicación: | 1-feb-2008 |
Editor: | Elsevier |
Cita bibliográfica: | ALCAÑIZ MONGE, Juan; ILLÁN GÓMEZ, María José. "Insight into hydroxides-activated coals: chemical or physical activation?". Journal of Colloid and Interface Science. Vol. 318, Issue 1 (1 Febr. 2008). ISSN 0021-9797, pp. 35-41 |
Resumen: | The objective of this paper is to get an insight into the chemical activation mechanism using KOH and NaOH as activated agents. Three coals have been selected as carbon precursors. It was found that KOH and NaOH develop a similar narrow microporosity, independently of the coal rank, whereas only KOH generates supermicroporosity. Temperature-programmed desorption experiments, carried out with impregnated anthracite, show differences on the gas evolved during the activated carbon preparation using the two activating agents. Thus, whereas hydrogen profiles are quite similar for both activated agents, the CO and H2O profiles are different. It is remarkable the high amount of H2O evolved at the maximum treatment temperature for both activating agents. The results obtained allow concluding that the chemical activation is due to a combination of different process driving the development of material porosity. |
Patrocinador/es: | Spanish Government (project CTQ-2005-01358) and the GV (projects GV/2007/144 and ARVIV/2007/067). |
URI: | http://hdl.handle.net/10045/8190 |
ISSN: | 0021-9797 |
DOI: | 10.1016/j.jcis.2007.10.017 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.jcis.2007.10.017 |
Aparece en las colecciones: | INV - MCMA - Artículos de Revistas |
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