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Energy estimation on CRN process of fly ash as a slow-release nitrogen fertilizer / Qi Qiu in Industrial & engineering chemistry research, Vol. 49 N° 12 (Juin 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5939–5944 Titre : Energy estimation on CRN process of fly ash as a slow-release nitrogen fertilizer Type de document : texte imprimé Auteurs : Qi Qiu, Auteur ; V. Hlavacek, Auteur Année de publication : 2010 Article en page(s) : pp. 5939–5944 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Carbothermal  reduction  and  nitridation  Nitrogen  fertilizer Résumé : Through carbothermal reduction and nitridation (CRN) reaction, nitrogen could be fixed into fly ash up to 28 wt %. Nitrided fly ash has the potential to be a source of slow release nitrogen fertilizer. To further investigate this potential, the energy consumptions were estimated for the nitridation process of fly ash. Reactors such as parallel rotary furnaces were simulated for the heat loss of radiation and convection. Material balance was carried out to determine the dimension of the rotary furnaces. Subsequently, on the basis of the dimension of the rotary furnace, the energy balance was performed from the reaction engineering aspects of the nitridation reaction of fly ash. Ultimately, the total energy was transformed into per unit nitrogen and compared with the energy consumption of the Haber−Bosch process for ammonia synthesis. The energy balance calculation suggested that there is great potential for nitrided fly ash to be slow release nitrogen fertilizer. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100391y [article] Energy estimation on CRN process of fly ash as a slow-release nitrogen fertilizer [texte imprimé] / Qi Qiu, Auteur ; V. Hlavacek, Auteur . - 2010 . - pp. 5939–5944. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5939–5944 Mots-clés : Carbothermal  reduction  and  nitridation  Nitrogen  fertilizer Résumé : Through carbothermal reduction and nitridation (CRN) reaction, nitrogen could be fixed into fly ash up to 28 wt %. Nitrided fly ash has the potential to be a source of slow release nitrogen fertilizer. To further investigate this potential, the energy consumptions were estimated for the nitridation process of fly ash. Reactors such as parallel rotary furnaces were simulated for the heat loss of radiation and convection. Material balance was carried out to determine the dimension of the rotary furnaces. Subsequently, on the basis of the dimension of the rotary furnace, the energy balance was performed from the reaction engineering aspects of the nitridation reaction of fly ash. Ultimately, the total energy was transformed into per unit nitrogen and compared with the energy consumption of the Haber−Bosch process for ammonia synthesis. The energy balance calculation suggested that there is great potential for nitrided fly ash to be slow release nitrogen fertilizer. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100391y