| Titre : | Effect of partial carbonation on the cyclic CaO carbonation reaction (2010) |
| Auteurs : | Gemma Grasa, Auteur ; Juan Carlos Abanades, Auteur ; Edward J. Anthony, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 48 N° 20, Octobre 2009) |
| Article en page(s) : | pp. |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Tags : | CaO particles Carbonation |
| Résumé : | CaO particles from the calcination of natural limestones can be used as regenerable solid sorbents in some CO2 capture systems. Their decay curves in terms of CO2 capture capacity have been extensively studied in the literature, always in experiments allowing particles to reach their maximum carbonation conversion for a given cycle. However, at the expected operating conditions in a CO2 capture system using the carbonation reaction, a relevant fraction of the CaO particles will not have time to fully convert in the carbonator reactor. This work investigates if there is any effect on the decay curves when CaO is only partially converted in each cycle. Experiments have been conducted in a thermobalance arranged to interrupt the carbonation reaction in each cycle before the end of the fast reaction period typical in the CaO−CO2 reaction. It is shown that, after the necessary normalization of results, the effective capacity of the sorbent to absorb CO2 during particle lifetime in the capture system slightly increases and CaO particles partially converted behave “younger” than particles fully converted after every calcination. This has beneficial implications for the design of carbonation/calcination loops. |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie900443y |
