| Titre : | Production of AlN by carbothermal and methanothermal reduction of Al2O3 in a N2 flow using concentrated thermal radiation (2009) |
| Auteurs : | M. E Gálvez, Éditeur scientifique ; A. Frei, Éditeur scientifique ; F. Meier, Éditeur scientifique |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 48 N°1, Janvier 2009) |
| Article en page(s) : | P. 528-533 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Tags : | Production of AlN Carbothermal and Methanothermal Reduction Thermal Radiation Carbon 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 |
