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Development of a CaO-based CO2 sorbent with improved cyclic stability / Karl O. Albrecht in Industrial & engineering chemistry research, Vol. 47 N°20 (Octobre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°20 (Octobre 2008) . - P. 7841-7848 Titre : Development of a CaO-based CO2 sorbent with improved cyclic stability Type de document : texte imprimé Auteurs : Karl O. Albrecht, Auteur ; Kyle S. Wagenbach, Auteur ; Justinus A. Satrio, Auteur Année de publication : 2008 Article en page(s) : P. 7841-7848 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : CaO-based  CO2 Résumé : The carbonation of CaO is an attractive method for removing CO2 from hot gas mixtures. However, regeneration and reuse of a CaO-based sorbent causes a gradual decline in absorption capacity, which ultimately limits the life of the material. Various methods have been proposed for increasing the life cycle performance of a CaO-based sorbent. Two of these methods were selected for further investigation. One method incorporates an “inert” material in the sorbent, while a second method stabilizes the sorbent through controlled sintering. Promising results were achieved with both methods when they were applied separately to a sorbent derived from a natural limestone. In one case MgO was finely dispersed within the sorbent, where it served as an “inert” material in the sense that it did not absorb CO2. A concentration of approximately 20 wt % appeared to be nearly optimal. In a second case the sorbent was stabilized by calcining the material at 1100 °C for 5 h. Although neither method produced a completely stable material, the stability of the sorbents was improved sufficiently so that by the end of a 1200-cycle test the absorption capacity of either of the treated sorbents was 45% greater than that of an untreated sorbent and the rate of decline was very small. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8007743 [article] Development of a CaO-based CO2 sorbent with improved cyclic stability [texte imprimé] / Karl O. Albrecht, Auteur ; Kyle S. Wagenbach, Auteur ; Justinus A. Satrio, Auteur . - 2008 . - P. 7841-7848. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°20 (Octobre 2008) . - P. 7841-7848 Mots-clés : CaO-based  CO2 Résumé : The carbonation of CaO is an attractive method for removing CO2 from hot gas mixtures. However, regeneration and reuse of a CaO-based sorbent causes a gradual decline in absorption capacity, which ultimately limits the life of the material. Various methods have been proposed for increasing the life cycle performance of a CaO-based sorbent. Two of these methods were selected for further investigation. One method incorporates an “inert” material in the sorbent, while a second method stabilizes the sorbent through controlled sintering. Promising results were achieved with both methods when they were applied separately to a sorbent derived from a natural limestone. In one case MgO was finely dispersed within the sorbent, where it served as an “inert” material in the sense that it did not absorb CO2. A concentration of approximately 20 wt % appeared to be nearly optimal. In a second case the sorbent was stabilized by calcining the material at 1100 °C for 5 h. Although neither method produced a completely stable material, the stability of the sorbents was improved sufficiently so that by the end of a 1200-cycle test the absorption capacity of either of the treated sorbents was 45% greater than that of an untreated sorbent and the rate of decline was very small. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8007743