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Comparison of mercury retention by fly ashes using different experimental devices / M. Antonia López-Antón in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10702–10707 Titre : Comparison of mercury retention by fly ashes using different experimental devices Type de document : texte imprimé Auteurs : M. Antonia López-Antón, Auteur ; Patricia Abad-Valle, Auteur ; Mercedes Díaz-Somoano, Auteur Année de publication : 2010 Article en page(s) : pp. 10702–10707 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Comparison--Mercury  Retention--Fly  Ashes--Using--Different--Experimental--Devices Résumé : To study mercury (Hg) retention in solid sorbents, researchers generally employ similar laboratory-scale devices. However, despite their similarities, these devices are generally used under different experimental conditions. The Hg concentration in the gas phase, gas flow, and sorbent-bed characteristics are variables that influence the contact time, mass transfer, and kinetics and may greatly modify the quantities of Hg retained when the same sorbents are compared. These differences in the experimental conditions do not impede an evaluation of the sorbents as long as the results obtained points toward the same qualitative conclusions. However, the extent of variation needs to be defined to avoid misinterpretation. To illustrate the range of interpretations, the results of a preliminary approach using four experimental devices in two laboratories have been compared in this work. All the experiments were carried out under a nitrogen atmosphere and Hg0 in the gas phase. The same sorbents were employed in all the devices. These were fly ashes obtained from the combustion of coals of different rank and with different unburned carbon contents. From the results obtained it can be inferred that it is necessary to strictly control the influence of the experimental variables to infer a correct interpretation of the results. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900766y [article] Comparison of mercury retention by fly ashes using different experimental devices [texte imprimé] / M. Antonia López-Antón, Auteur ; Patricia Abad-Valle, Auteur ; Mercedes Díaz-Somoano, Auteur . - 2010 . - pp. 10702–10707. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10702–10707 Mots-clés : Comparison--Mercury  Retention--Fly  Ashes--Using--Different--Experimental--Devices Résumé : To study mercury (Hg) retention in solid sorbents, researchers generally employ similar laboratory-scale devices. However, despite their similarities, these devices are generally used under different experimental conditions. The Hg concentration in the gas phase, gas flow, and sorbent-bed characteristics are variables that influence the contact time, mass transfer, and kinetics and may greatly modify the quantities of Hg retained when the same sorbents are compared. These differences in the experimental conditions do not impede an evaluation of the sorbents as long as the results obtained points toward the same qualitative conclusions. However, the extent of variation needs to be defined to avoid misinterpretation. To illustrate the range of interpretations, the results of a preliminary approach using four experimental devices in two laboratories have been compared in this work. All the experiments were carried out under a nitrogen atmosphere and Hg0 in the gas phase. The same sorbents were employed in all the devices. These were fly ashes obtained from the combustion of coals of different rank and with different unburned carbon contents. From the results obtained it can be inferred that it is necessary to strictly control the influence of the experimental variables to infer a correct interpretation of the results. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900766y