Carbon foam prepared by pyrolysis of olive stones under steam
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http://hdl.handle.net/10045/2660
Títol: | Carbon foam prepared by pyrolysis of olive stones under steam |
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Autors: | Vieira-Ribeiro Azzi Ríos, Rachel | Martinez-Escandell, Manuel | Molina Sabio, Miguel | Rodríguez Reinoso, Francisco |
Grups d'investigació o GITE: | Laboratorio de Materiales Avanzados |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Química Inorgánica |
Paraules clau: | Char | Pyrolysis | Porosity |
Àrees de coneixement: | Química Inorgánica |
Data de creació: | 2005 |
Data de publicació: | de juliol-2006 |
Editor: | Elsevier |
Citació bibliogràfica: | VIEIRA-RIBEIRO AZZI RÍOS, Rachel, et al. "Carbon foam prepared by pyrolysis of olive stones under steam". Carbon. Vol. 44, Issue 8 (July 2006). ISSN 0008-6223, pp. 1448-1454 |
Resum: | The experimental conditions for the pyrolysis of olive stones to produce a swelling of the particle and eventually the formation of carbon foam are described and discussed. The greatest expansion of the material occurred when 200–300 g of precursor, in the presence of steam at a pressure of 1 MPa, is introduced into a 1000 ml stainless steel reactor placed inside a sand-bath furnace previously heated to 500 °C. In a few minutes the pyrolysis begins and this exothermic process leads to a more rapid pyrolysis. A relationship between heating rate and degree of foaming for the resulting char is observed. The carbon foam obtained exhibits a low density, 0.2–0.3 g/cm3, due to the presence of meso and macropores, mainly those of size larger than 1 μm. A mechanism is suggested to explain the formation of the foam as a combination of a softening of the precursor and a fragmentation of the biopolymers to produce a ‘‘melt’’. A fast increase in temperature reduces the viscosity of the ‘‘melt’’ and facilitates the fragmentation to volatiles, responsible for the swelling of the particles and the formation of the foam. |
Patrocinadors: | Financial support of Ministerio de Educacio´n y Ciencia, Spain, project number MAT2004-03480-C02-02 is acknowledged. |
URI: | http://hdl.handle.net/10045/2660 |
ISSN: | 0008-6223 |
DOI: | 10.1016/j.carbon.2005.11.028 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Revisió científica: | si |
Versió de l'editor: | http://dx.doi.org/10.1016/j.carbon.2005.11.028 |
Apareix a la col·lecció: | INV - LMA - Artículos de Revistas |
Arxius per aquest ítem:
Arxiu | Descripció | Tamany | Format | |
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carbon_foam.pdf | Versión final (acceso restringido) | 305,63 kB | Adobe PDF | Obrir Sol·licitar una còpia |
carbon_foam_proof.pdf | Borrador revisado (acceso libre) | 301,47 kB | Adobe PDF | Obrir Vista prèvia |
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