Modification of the porous structure along the preparation of activated carbon monoliths with H3PO4 and ZnCl2
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Título: | Modification of the porous structure along the preparation of activated carbon monoliths with H3PO4 and ZnCl2 |
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Autor/es: | Nakagawa, Yoshiteru | Molina Sabio, Miguel | Rodríguez Reinoso, Francisco |
Grupo/s de investigación o GITE: | Laboratorio de Materiales Avanzados |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Inorgánica |
Palabras clave: | Activated carbon | Activation | Calorimetry | Microporosity | Adsorption |
Área/s de conocimiento: | Química Inorgánica |
Fecha de creación: | 2006 |
Fecha de publicación: | 20-jun-2007 |
Editor: | Elsevier |
Cita bibliográfica: | NAKAGAWA, Yoshiteru; MOLINA SABIO, Miguel; RODRÍGUEZ REINOSO, Francisco. "Modification of the porous structure along the preparation of activated carbon monoliths with H3PO4 and ZnCl2". Microporous and Mesoporous Materials. Vol. 103, Issues 1-3 (20 June 2007). ISSN 1387-1811, pp. 29-34 |
Resumen: | Two series of activated carbon monoliths (discs) have been prepared by chemical activation of olive stones with phosphoric acid or zinc chloride, without the use of any binder. A conforming step was introduced between impregnation with the chemical and heat treatment. Two equivalent series of granular activated carbons were also prepared in order to analyse the effect of conforming pressure on the porosity of the final activated carbon. The evolution of microporosity and the micropore size distribution has been followed by gas adsorption (N2 at −196 °C and CO2 at 0 °C) and immersion calorimetry into three liquids with different molecular dimensions (dichloromethane, benzene and 2,2-dimethylbutane). The experimental results indicate that activation by both chemicals produces a large development of microporosity but the differences between the granular and monolithic forms are more noticeable when using phosphoric acid. Thus, there is mainly a reduction in the interparticle space and macroporosity during the formation of the discs prepared using zinc chloride whereas there is an additional reduction in the volume and dimension of the meso- and microporosity when using phosphoric acid. The different behaviour of the two chemicals has been related to their effect on the precursor along the impregnation step. |
Patrocinador/es: | Authors acknowledge the financial support from MEC (The project MAT2004-03480-C02-02). |
URI: | http://hdl.handle.net/10045/2659 |
ISSN: | 1387-1811 |
DOI: | 10.1016/j.micromeso.2007.01.029 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.micromeso.2007.01.029 |
Aparece en las colecciones: | INV - LMA - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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P_and_Zn.pdf | Versión final (acceso restringido) | 174,58 kB | Adobe PDF | Abrir Solicitar una copia |
Zn y P.pdf | Borrador revisado (acceso libre) | 161,35 kB | Adobe PDF | Abrir Vista previa |
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