Documents disponibles écrits par cet auteur

Biomass combustion with in situ CO2 capture by CaO. II. experimental results / Mónica Alonson in Industrial & engineering chemistry research, Vol. 50 N° 11 (Juin 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp. 6982-6989 Titre : Biomass combustion with in situ CO2 capture by CaO. II. experimental results Type de document : texte imprimé Auteurs : Mónica Alonson, Auteur ; Nuria Rodriguez, Auteur ; Belén Gonzalez, Auteur Année de publication : 2011 Article en page(s) : pp. 6982-6989 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Carbon  dioxide  In  situ  Combustion  Biomass Résumé : Experiments to test the concept of biomass combustion with in situ CO2 capture by CaO have been conducted in a 30 kW interconnected fluidized-bed test facility. The CO2 capture efficiency in a combustor―carbonator reactor was measured over a range of operating conditions, using three biomass feeds (olive pits, saw dust, and pellets). Overall CO2 capture efficiencies higher than 80% were achieved with sufficiently high solids circulation rates of CaO and solids inventories in the combustor―carbonator. Emissions of CO and CH4 were detected during the experiments, possibly because of pulse feeding and/or an inappropriate air/fuel mixture. The application of a simple reactor model for combining biomass combustion and CO2 capture allows an effectiveness factor of 0.74 to be derived for all of the experiments. This could be valuable for scaling-up purposes. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24199917 [article] Biomass combustion with in situ CO2 capture by CaO. II. experimental results [texte imprimé] / Mónica Alonson, Auteur ; Nuria Rodriguez, Auteur ; Belén Gonzalez, Auteur . - 2011 . - pp. 6982-6989. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp. 6982-6989 Mots-clés : Carbon  dioxide  In  situ  Combustion  Biomass Résumé : Experiments to test the concept of biomass combustion with in situ CO2 capture by CaO have been conducted in a 30 kW interconnected fluidized-bed test facility. The CO2 capture efficiency in a combustor―carbonator reactor was measured over a range of operating conditions, using three biomass feeds (olive pits, saw dust, and pellets). Overall CO2 capture efficiencies higher than 80% were achieved with sufficiently high solids circulation rates of CaO and solids inventories in the combustor―carbonator. Emissions of CO and CH4 were detected during the experiments, possibly because of pulse feeding and/or an inappropriate air/fuel mixture. The application of a simple reactor model for combining biomass combustion and CO2 capture allows an effectiveness factor of 0.74 to be derived for all of the experiments. This could be valuable for scaling-up purposes. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24199917

Modeling of the deactivation of CaO in a carbonate loop at high temperatures of calcination / Belén Gonzalez in Industrial & engineering chemistry research, Vol. 47 N° 23 (Décembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9256–9262 Titre : Modeling of the deactivation of CaO in a carbonate loop at high temperatures of calcination Type de document : texte imprimé Auteurs : Belén Gonzalez, Auteur ; Gemma Grasa, Auteur ; Monica Alonso, Auteur Année de publication : 2009 Article en page(s) : p. 9256–9262 Note générale : Chemistry engineering Langues : Anglais (eng) Mots-clés : CaO  Carbonate  Loop  High  Temperatures  of  Calcination Résumé : Calcium oxide is being proposed as a regenerable sorbent for CO2 at high temperatures via a carbonation/calcination loop. It is well-known that natural sorbents lose their capacity to capture CO2 as the number of the carbonation/calcination cycles increases. The equations proposed in the literature to describe this decay are limited to moderate calcination temperatures (typically well below 950 °C). This work studies the effect of the calcination temperature and calcination time when the temperatures exceed 950 °C. Such high regeneration temperatures are necessary in some of the most efficient processes proposed, and they are shown to strongly affect sorbent performance. We propose a model to describe maximum sorbent conversion as a function of the number of cycles, the calcination temperature, and the calcination time. This model combines existing knowledge about the decay of sorbent activity under moderate calcination temperatures with the effect of sintering in each cycle. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8009318 [article] Modeling of the deactivation of CaO in a carbonate loop at high temperatures of calcination [texte imprimé] / Belén Gonzalez, Auteur ; Gemma Grasa, Auteur ; Monica Alonso, Auteur . - 2009 . - p. 9256–9262. Chemistry engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9256–9262 Mots-clés : CaO  Carbonate  Loop  High  Temperatures  of  Calcination Résumé : Calcium oxide is being proposed as a regenerable sorbent for CO2 at high temperatures via a carbonation/calcination loop. It is well-known that natural sorbents lose their capacity to capture CO2 as the number of the carbonation/calcination cycles increases. The equations proposed in the literature to describe this decay are limited to moderate calcination temperatures (typically well below 950 °C). This work studies the effect of the calcination temperature and calcination time when the temperatures exceed 950 °C. Such high regeneration temperatures are necessary in some of the most efficient processes proposed, and they are shown to strongly affect sorbent performance. We propose a model to describe maximum sorbent conversion as a function of the number of cycles, the calcination temperature, and the calcination time. This model combines existing knowledge about the decay of sorbent activity under moderate calcination temperatures with the effect of sintering in each cycle. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8009318