Résumé -Effet des cendres sur l'activité des porteurs d'oxygène dans la combustion du charbon en boucle chimique -L'application de la combustion en boucle chimique (CLC) aux combustibles solides est actuellement étudiée à l'Université du Kentucky, au Centre de Recherche de l'Energie Appliquée (CAER) dans le but de développer un procédé de gazéification/combustion en boucle chimique pressurisé (PCLC/G) afin de générer de l'électricité à partir de charbon. Un des principaux aspects de la combustion en boucle chimique de combustibles solides est la compréhension de l'effet des cendres sur la réactivité des porteurs d'oxygène (OCs). L'effet des cendres sur la capacité de transfert
Activated carbons were used to selectively remove NOx from simulated flue gas at temperatures between 25 and 125 °C. Processing conditions and physical/chemical characteristics of the carbons which affected NOx adsorption, storage, and release were investigated. Oxygen as a coreactant was necessary to maximize the conversion of NO to NO2 and condensation of NO2 within the pores of the carbons. A NO-to-NO2 conversion mechanism is presented and discussed relative to previous research. A process for selectively removing NOx and concentrating it as NO2 in an alternate process stream is outlined. The purified NO2 stream could be used for chemicals manufacturing.
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