This paper deals with steam hydration as a reactivation technique of the CO2 capture potential of spent limestone-based sorbents from FB calcium looping (CaL) systems. A reference, high-calcium, reactive limestone was deactivated by carrying out lab-scale FB CaL tests (calcination at 940°C in a 70% CO2 atmosphere; carbonation at 650°C in a 15% CO2 atmosphere), and then steam hydrated (at 250°C in a 50% steam atmosphere) in the same FB, for times ranging from 10 to 60 min. On-line flue gas analysis, continuous capture of the elutriated fines and particle size distribution analysis were performed on the reactivated sorbents upon additional CaL tests, while thermogravimetry, scanning electron microscopy and porosimetry were employed as experimental techniques to characterize the spent and the steam hydrated sorbents. In this way, it was possible to investigate the effect of the hydration time on: the changes in the physico–chemical and microstructural properties induced by the hydration treatment; the reactivation of the sorbent CO2 capture capacity; the attrition/fragmentation tendency of the reactivated materials.

Steam hydration of FB calcium looping sorbents / Coppola, A.; Scala, Fabrizio; Montagnaro, Fabio; Palladino, L.; Salatino, Piero. - (2015), pp. 936-942. (Intervento presentato al convegno 22nd International Conference on Fluidized Bed Conversion tenutosi a Turku, Finland nel 14-17 Giugno 2015).

Steam hydration of FB calcium looping sorbents

SCALA, FABRIZIO;MONTAGNARO, FABIO;SALATINO, PIERO
2015

Abstract

This paper deals with steam hydration as a reactivation technique of the CO2 capture potential of spent limestone-based sorbents from FB calcium looping (CaL) systems. A reference, high-calcium, reactive limestone was deactivated by carrying out lab-scale FB CaL tests (calcination at 940°C in a 70% CO2 atmosphere; carbonation at 650°C in a 15% CO2 atmosphere), and then steam hydrated (at 250°C in a 50% steam atmosphere) in the same FB, for times ranging from 10 to 60 min. On-line flue gas analysis, continuous capture of the elutriated fines and particle size distribution analysis were performed on the reactivated sorbents upon additional CaL tests, while thermogravimetry, scanning electron microscopy and porosimetry were employed as experimental techniques to characterize the spent and the steam hydrated sorbents. In this way, it was possible to investigate the effect of the hydration time on: the changes in the physico–chemical and microstructural properties induced by the hydration treatment; the reactivation of the sorbent CO2 capture capacity; the attrition/fragmentation tendency of the reactivated materials.
2015
978-952-12-3223-7
Steam hydration of FB calcium looping sorbents / Coppola, A.; Scala, Fabrizio; Montagnaro, Fabio; Palladino, L.; Salatino, Piero. - (2015), pp. 936-942. (Intervento presentato al convegno 22nd International Conference on Fluidized Bed Conversion tenutosi a Turku, Finland nel 14-17 Giugno 2015).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/621389
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