The aim of this work was to investigate the hydration-reactivation behaviour of spent sorbents from a calcium looping process. The following aspects were considered: the changes in the sorbent physico-chemical properties induced by hydration, the regeneration of the CO2 capture capacity and the attrition tendency of the material once reused in the looping cycle. To this end, a reference limestone was subjected to multiple calcination/carbonation cycles in a lab-scale fluidized bed reactor and then reactivated by water hydration at room temperature for different times. Physico-chemical characterization of the hydrated material indicated that 10 min hydration was long enough to effectively reactivate the spent sorbent. Results of the tests showed a renewal of the CO2 capture capacity that could be related to chemical hydration and increase in sorbent porosity. Attrition/fragmentation data referring to both as-received and reactivated sorbent are presented and critically discussed.
Water reactivation of spent sorbents from a calcium looping process / A., Coppola; Montagnaro, Fabio; Salatino, Piero; Scala, Fabrizio. - STAMPA. - 1:(2012), pp. 429-436. (Intervento presentato al convegno 21st International Conference on Fluidized Bed Combustion tenutosi a Naples, Italy nel 3-6 Giugno).
Water reactivation of spent sorbents from a calcium looping process
MONTAGNARO, FABIO;SALATINO, PIERO;SCALA, FABRIZIO
2012
Abstract
The aim of this work was to investigate the hydration-reactivation behaviour of spent sorbents from a calcium looping process. The following aspects were considered: the changes in the sorbent physico-chemical properties induced by hydration, the regeneration of the CO2 capture capacity and the attrition tendency of the material once reused in the looping cycle. To this end, a reference limestone was subjected to multiple calcination/carbonation cycles in a lab-scale fluidized bed reactor and then reactivated by water hydration at room temperature for different times. Physico-chemical characterization of the hydrated material indicated that 10 min hydration was long enough to effectively reactivate the spent sorbent. Results of the tests showed a renewal of the CO2 capture capacity that could be related to chemical hydration and increase in sorbent porosity. Attrition/fragmentation data referring to both as-received and reactivated sorbent are presented and critically discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.