A Mathematic Model for Direct Causticization of Na2CO3 with TiO2 in a Semi‐batch Reactor

摘要: A mathematic model was developed for direct causticization of sodium carbonate with titanium dioxide in a semi-batch reactor. The predictions the titanate yield and pentatitanate showed reasonable agreement experimental data from pilot-scale fluidized bed operating mode. rate constant present generally consistent those obtained small-scale batch experiments literature. new considering conversion to introduced. All results provided support that solid-state follows shrinking-core diffusion model. On mis au point un modele mathematique pour la caustication directe du de avec dyoxide titane dans reacteur semi-discontinu. Les sur le rendement en et montrent accord raisonnable les donnees experimentales venant d'un lit fluidise l'echelle pilote fonctionnant mode La constante vitesse est generalement coherente celles obtenues experiences discontinues petite echelle litterature scientifique. On presente une nouvelle considerant pentatitanate. Tous resultats permettent penser que causticisation l'etat solide dioxyde semi-discontinu obeit cœur retrecissant.