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- W1968522043 abstract "The pyrolysis of sewage sludge was examined by thermogravimetric analysis using different heating rates, particle sizes and final temperatures. A semi-empirical model was developed with four global consecutive/competitive reactions to volatile and solid products including also a heat balance. This model was extrapolated to isothermal reactor conditions and compared to experimental data on fluidized bed pyrolysis. Depending on the particle size and reactor temperature, about 90% of the maximum conversion in a fluidized bed takes place under external heat transfer control, the rest under kinetic control. Incomplete conversion occurs at short particle residence times, which were calculated approximately by the model. On a étudié la pyrolyse de boues d'eaux usées par l'analyse thermogravimétrique avec différentes vitesses de chauffe, tailles de particules et températures finales. Un modèle semi-empirique a été mis au point avec quatre réactions globales consécutives et compétitives donnant des produits solides et volatiles qui inclue également un équilibre de chaleur. Ce modèle est extrapolé pour les conditions d'un réacteur isotherme et comparé aux données expérimentales sur la pyrolyse en lit fluidisé. Selon la taille des particules et la température du réacteur, environ 90% de la conversion maximum pour les lits fluidisés se produit dans des conditions de contrǒle de transfer de chaleur externe, le reste dans des conditions de contrǒle cinétique. La conversion incomplète a lieu pour des faibles temps de séjour des particules, qui ont été calculès approximativement par le modèle." @default.
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- W1968522043 date "1991-08-01" @default.
- W1968522043 modified "2023-10-03" @default.
- W1968522043 title "Kinetic studies of the pyrolysis of sewage sludge by tga and comparison with fluidized beds" @default.
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- W1968522043 doi "https://doi.org/10.1002/cjce.5450690418" @default.
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