Porous structure and morphology of granular chars from flash and conventional pyrolysis of grape seeds
Entity
UAM. Departamento de Ingeniería QuímicaPublisher
ElsevierDate
2013-04-18Citation
10.1016/j.biombioe.2013.03.020
Biomass and Bioenergy 54 (2013): 123-132
ISSN
0961-9534 (print); 1873-2909 (online)DOI
10.1016/j.biombioe.2013.03.020Funded by
The authors greatly appreciate financial support from the Spanish Ministerio de Ciencia e Innovación (CTQ2009-09983)Project
Gobierno de España. CTQ2009-09983Editor's Version
https://doi.org/10.1016/j.biombioe.2013.03.020GetSubjects
Biomass; Char; Microporous carbon; Pyrolysis; Vitis vinifera; QuímicaRights
© 2013 Elsevier Ltd.Esta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional.
Abstract
This work studies the influence of the operating conditions used in the pyrolysis of grape seeds on the morphology and textural properties of the chars resulting. Flash and conventional (283Kmin-1 heating rate) pyrolysis have been used within a wide range of temperature (300-1000°C). The effect of a pretreatment for oil extraction has also been studied. The porous structure of the chars was characterized by adsorption of N2 at 77K, Ar at 77K and 87K, and CO2 at 273K and mercury intrusion porosimetry. The morphology was analyzed by scanning electron microscopy. All the materials prepared revealed an essentially microporous structure, with a poor or even negligible contribution of mesopores. Increasing pyrolysis temperature led to higher specific surface areas and lower pore size. The highest specific surface area values occurred within 700-800°C, reaching up to 500m2g-1 with pore sizes in the 0.4-1.1nm range. No significant morphological changes were observed upon carbonization so that the resulting chars were granular materials of similar size than the starting grape seeds. The hollow core structure of the chars, with most of the material allocated at the periphery of the granules can help to overcome the mass transfer limitations of most common (solid or massive) granular activated carbons. The chars showed a good mechanical strength during attrition tests. These chars can be potential candidates for the preparation of granular carbons molecular sieve or activated carbons raw materials
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Google Scholar:Jimenez-Cordero, Diana
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Heras Muñoz, Francisco
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Alonso Morales, Noelia
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Gilarranz Redondo, Miguel Ángel
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Rodriguez, Juan J.
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