Microwave pyrolysis of wood pellets / Robinson, J. P. in Industrial & engineering chemistry research, Vol. 49 N° 2 (Janvier 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 459–463 Titre : Microwave pyrolysis of wood pellets Type de document : texte imprimé Auteurs : Robinson, J. P., Auteur ; Kingman, S. W., Auteur ; Barranco, R., Auteur Année de publication : 2010 Article en page(s) : pp 459–463 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Pyrolysis Wood Microwave pyrolysis. Résumé : The pyrolysis of wood pellets was investigated using a single-mode microwave cavity, and the dielectric properties of the wood were measured at temperatures up to 750 °C. Below 600 °C, the only microwave-absorbing phase within wood is water. This study has shown categorically that microwave pyrolysis can be achieved without the use of carbon-rich dopants and that the heating of water alone can be used to induce pyrolysis of wood. A number of potential mechanisms are discussed that relate to the power density within the heated material. The yield of bio-oil and biogas is a function of the heating rate and power density, and for the samples used in this study, a threshold power density of 5.0 × 108 W/m3 was found, below which microwave pyrolysis did not occur. The results and hypotheses presented in this article represent the first steps in understanding the fundamental mechanisms of microwave pyrolysis. DEWEY : 660 ISSN : 0888-5858 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901336k [article] Microwave pyrolysis of wood pellets [texte imprimé] / Robinson, J. P., Auteur ; Kingman, S. W., Auteur ; Barranco, R., Auteur . - 2010 . - pp 459–463. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 459–463 Mots-clés : Pyrolysis Wood Microwave pyrolysis. Résumé : The pyrolysis of wood pellets was investigated using a single-mode microwave cavity, and the dielectric properties of the wood were measured at temperatures up to 750 °C. Below 600 °C, the only microwave-absorbing phase within wood is water. This study has shown categorically that microwave pyrolysis can be achieved without the use of carbon-rich dopants and that the heating of water alone can be used to induce pyrolysis of wood. A number of potential mechanisms are discussed that relate to the power density within the heated material. The yield of bio-oil and biogas is a function of the heating rate and power density, and for the samples used in this study, a threshold power density of 5.0 × 108 W/m3 was found, below which microwave pyrolysis did not occur. The results and hypotheses presented in this article represent the first steps in understanding the fundamental mechanisms of microwave pyrolysis. DEWEY : 660 ISSN : 0888-5858 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901336k

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