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Thermal and kinetic analysis of the process of thermochemical decomposition of phosphogypsum with CO and additives / Liping Ma in Industrial & engineering chemistry research, Vol. 51 N° 19 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 19 (Mai 2012) . - pp. 6680-6685 Titre : Thermal and kinetic analysis of the process of thermochemical decomposition of phosphogypsum with CO and additives Type de document : texte imprimé Auteurs : Liping Ma, Auteur ; Yalei Du, Auteur ; Xuekui Niu, Auteur Année de publication : 2012 Article en page(s) : pp. 6680-6685 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Additive  Kinetics Résumé : Phosphogypsum (PG) is a waste byproduct from the processing of phosphate rock by the "wet add method" of fertilizer production. One of the main methods for reusing PG is to decompose and recycle Ca and sulfur contained in it. However, the decomposition reaction process is very complex because of its complicated contents, and very high temperature is needed for the reaction. In this paper, to decrease the reaction temperature, CO as a main reducer and some additives were added in the decomposition process. Results show that the decomposition temperature will decrease from 1000 to 809 °C with pure CO. When CaCl2 is used as an additive, the decomposition temperature can decrease to 790 °C, and at the same time the reaction rate will be increased, the main product being CaS at this condition. The thermal and kinetic action of this process has also been discussed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25900222 [article] Thermal and kinetic analysis of the process of thermochemical decomposition of phosphogypsum with CO and additives [texte imprimé] / Liping Ma, Auteur ; Yalei Du, Auteur ; Xuekui Niu, Auteur . - 2012 . - pp. 6680-6685. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 19 (Mai 2012) . - pp. 6680-6685 Mots-clés : Additive  Kinetics Résumé : Phosphogypsum (PG) is a waste byproduct from the processing of phosphate rock by the "wet add method" of fertilizer production. One of the main methods for reusing PG is to decompose and recycle Ca and sulfur contained in it. However, the decomposition reaction process is very complex because of its complicated contents, and very high temperature is needed for the reaction. In this paper, to decrease the reaction temperature, CO as a main reducer and some additives were added in the decomposition process. Results show that the decomposition temperature will decrease from 1000 to 809 °C with pure CO. When CaCl2 is used as an additive, the decomposition temperature can decrease to 790 °C, and at the same time the reaction rate will be increased, the main product being CaS at this condition. The thermal and kinetic action of this process has also been discussed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25900222