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Silver impregnated carbon for adsorption and desorption of elemental mercury vapors

Journal of Environmental Sciences 2011年第9期23卷 1578-1583页

作者： Despina Karatza Marina Prisciandaro Amedeo Lancia Dino Musmarra Dipartimento di Ingegneria Chimica Universitàdi Napoli "Federico II" Dipartimento di Chimica Ingegneria Chimica e MaterialiUniversitàde L’Aquila Centro Interdipartimentale di Ricerca in Ingegneria Ambientale Dipartimento di Ingegneria CivileSeconda Universitàdegli Studi di NapoliReal Casa dell’AnnunziataVia Roma 2981031 Aversa (CE)Italy

The Hg 0 vapor adsorption experimental results on a novel sorbent obtained by impregnating a commercially available activated carbon （Darco G60 from BDH） with silver nitrate were *** study was performed by using a fundamental approach,in an apparatus at laboratory scale in which a synthetic flue gas,formed by Hg 0 vapors in a nitrogen gas stream,at a given temperature and mercury concentration,was flowed through a fixed bed of adsorbent *** curves and adsorption isotherms were obtained for bed temperatures of 90,120 and 150°C and for Hg 0 concentrations in the gas varying in the range of 0.8–5.0 mg/m 3 .The experimental gas-solid equilibrium data were used to evaluate the Langmuir parameters and the heat of *** experimental results showed that silver impregnated carbon was very effective to capture elemental mercury and the amount of mercury adsorbed by the carbon decreased as the bed temperature *** addition,to evaluate the possibility of adsorbent recovery,desorption was also *** runs showed that both the adsorbing material and the mercury could be easily recovered,since at the end of desorption the residue on solid was almost *** material balance on mercury and the constitutive equations of the adsorption phenomenon were integrated,leading to the evaluation of only one kinetic parameter which fits well both the experimentally determined breakthrough and desorption curves.

关键词： mercury carbon msw incinerators adsorption desorption silver nitrate

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