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Reversible chemisorbents for carbon dioxide and their potential applications / ki bong lee Michael in Industrial & engineering chemistry research, Vol. 47 n°21 (Novembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p 8048–8062 Titre : Reversible chemisorbents for carbon dioxide and their potential applications Type de document : texte imprimé Auteurs : ki bong lee Michael, Auteur ; G.Beaver Hugo, Auteur Année de publication : 2008 Article en page(s) : p 8048–8062 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : PhysisorbentsChemisorbents Résumé : Physisorbents like zeolites, activated carbons, silica, and alumina gels have been traditionally used for separation of bulk or trace carbon dioxide from a gas mixture using a pressure or a thermal swing adsorption process. These processes are generally operated at near ambient or at moderate temperatures (say <100 °C) because the equilibrium sorption capacity and selectivity of sorption of CO2 on the physi-sorbents rapidly decrease at higher temperatures. Recently, a variety of reversible CO2 chemisorbents have been developed which offer decent sorption capacity and high selectivity for CO2 at relatively higher temperatures (∼150 to 500 °C). Some of these chemisorbents even exhibit high selectivity of CO2 sorption in the presence of H2O which is mechanistically impossible for a physisorbent. Consequently, these chemisorbents can be used in (a) sorption enhanced reaction (SER) concepts for production of fuel-cell grade H2 from natural gas by low temperature steam-methane reformation reaction at ca. 400−500 °C or from synthesis gas by water−gas shift reaction at ca. 200−400 °C, and (b) removal and recovery of CO2 from a flue gas at a temperature of 150−200 °C without precooling, predrying, and precompression. A comprehensive review of this subject is presented. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800795y [article] Reversible chemisorbents for carbon dioxide and their potential applications [texte imprimé] / ki bong lee Michael, Auteur ; G.Beaver Hugo, Auteur . - 2008 . - p 8048–8062. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p 8048–8062 Mots-clés : PhysisorbentsChemisorbents Résumé : Physisorbents like zeolites, activated carbons, silica, and alumina gels have been traditionally used for separation of bulk or trace carbon dioxide from a gas mixture using a pressure or a thermal swing adsorption process. These processes are generally operated at near ambient or at moderate temperatures (say <100 °C) because the equilibrium sorption capacity and selectivity of sorption of CO2 on the physi-sorbents rapidly decrease at higher temperatures. Recently, a variety of reversible CO2 chemisorbents have been developed which offer decent sorption capacity and high selectivity for CO2 at relatively higher temperatures (∼150 to 500 °C). Some of these chemisorbents even exhibit high selectivity of CO2 sorption in the presence of H2O which is mechanistically impossible for a physisorbent. Consequently, these chemisorbents can be used in (a) sorption enhanced reaction (SER) concepts for production of fuel-cell grade H2 from natural gas by low temperature steam-methane reformation reaction at ca. 400−500 °C or from synthesis gas by water−gas shift reaction at ca. 200−400 °C, and (b) removal and recovery of CO2 from a flue gas at a temperature of 150−200 °C without precooling, predrying, and precompression. A comprehensive review of this subject is presented. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800795y