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Production of AlN by carbothermal and methanothermal reduction of Al2O3 in a N2 flow using concentrated thermal radiation / M. E Gálvez in Industrial & engineering chemistry research, Vol. 48 N°1 (Janvier 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - P. 528-533 Titre : Production of AlN by carbothermal and methanothermal reduction of Al2O3 in a N2 flow using concentrated thermal radiation Type de document : texte imprimé Auteurs : M. E Gálvez, Editeur scientifique ; A. Frei, Editeur scientifique ; F. Meier, Editeur scientifique Année de publication : 2009 Article en page(s) : P. 528-533 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Production  of  AlN  Carbothermal  and  Methanothermal  Reduction  Thermal  Radiation  Carbon  and  metals  (Fe,  Ni) Résumé : The production of AlN by thermal reduction of Al2O3 in a N2 flow, with C/CH4 as reducing agents, is investigated using concentrated thermal radiation as the energy source of high-temperature process heat. Samples were directly exposed to radiative fluxes equivalent to peak solar concentration ratios exceeding 4500 suns (1 sun = 1 kW/m2) and subjected to temperatures in the 2100−2300 K range. Experimental data were fitted to an Arrhenius-type solid−solid kinetic model with an apparent activation energy of 360 kJ·mol−1. The catalytic effect of activated carbon and metals (Fe, Ni) was examined, revealing that metallic particles served as nucleation sites for carbon filamental growth. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8011193 [article] Production of AlN by carbothermal and methanothermal reduction of Al2O3 in a N2 flow using concentrated thermal radiation [texte imprimé] / M. E Gálvez, Editeur scientifique ; A. Frei, Editeur scientifique ; F. Meier, Editeur scientifique . - 2009 . - P. 528-533. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - P. 528-533 Mots-clés : Production  of  AlN  Carbothermal  and  Methanothermal  Reduction  Thermal  Radiation  Carbon  and  metals  (Fe,  Ni) Résumé : The production of AlN by thermal reduction of Al2O3 in a N2 flow, with C/CH4 as reducing agents, is investigated using concentrated thermal radiation as the energy source of high-temperature process heat. Samples were directly exposed to radiative fluxes equivalent to peak solar concentration ratios exceeding 4500 suns (1 sun = 1 kW/m2) and subjected to temperatures in the 2100−2300 K range. Experimental data were fitted to an Arrhenius-type solid−solid kinetic model with an apparent activation energy of 360 kJ·mol−1. The catalytic effect of activated carbon and metals (Fe, Ni) was examined, revealing that metallic particles served as nucleation sites for carbon filamental growth. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8011193