Reducing CO2 emissions from oil shale semicoke smoldering combustion by varying the carbonate and fixed carbon contents - IMT Mines Albi-Carmaux Accéder directement au contenu
Article Dans Une Revue Combustion and Flame Année : 2011

Reducing CO2 emissions from oil shale semicoke smoldering combustion by varying the carbonate and fixed carbon contents

Résumé

One technique used to recover oil from ground oil shale, or to burn oil shale semicoke, consists of propagating a smoldering front through a packed bed. One drawback of this technique is that the mineral structure of the shale is decarbonated due to the high temperature of the front. This phenomenon causes 70% of the CO 2 emissions released during such processes. The remaining 30% result from the fixed carbon oxidation. With the aim of decreasing the front temperature and thus avoiding decarbonation at the front passage, the impact of two parameters was experimentally tested in this work: first, increasing the amount of carbonates, as they may play the role of a heat sink, and second, decreasing the amount of fixed carbon in the medium. It is shown that increasing the amount of carbonates can only decrease the front temperature to 800 °C but not lower, which is still too high to avoid decarbonation. On the other hand, the front temperature can be decreased enough for decarbonation to be almost completely avoided by reducing the amount of fixed carbon. At the low temperatures reached, almost all the fixed carbon is oxidized, but not all the oxygen transported in the air is consumed by the chemical front. The velocity of the front is consequently decreased.
Fichier principal
Vignette du fichier
reducingco2emissions.pdf (873.83 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01801118 , version 1 (01-06-2018)

Identifiants

Citer

M. Sennoune, Sylvain Salvador, Michel Quintard. Reducing CO2 emissions from oil shale semicoke smoldering combustion by varying the carbonate and fixed carbon contents. Combustion and Flame, 2011, 158 (11), pp.2272 - 2282. ⟨10.1016/j.combustflame.2011.04.004⟩. ⟨hal-01801118⟩
121 Consultations
250 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More