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Modeling kinetics of Cd, Pb, and Zn vaporization during municipal solid waste bed incineration / Abhishek Asthana in Industrial & engineering chemistry research, Vol. 49 N° 16 (Août 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp. 7605–7609 Titre : Modeling kinetics of Cd, Pb, and Zn vaporization during municipal solid waste bed incineration Type de document : texte imprimé Auteurs : Abhishek Asthana, Auteur ; Quentin Falcoz, Auteur ; Philippe Sessiecq, Auteur Année de publication : 2010 Article en page(s) : pp. 7605–7609 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Modeling  Kinetics Résumé : The fate of heavy metals contained in municipal solid waste is of major concern in the incineration process. This study is the first attempt to analyze the kinetic behavior of Cd, Pb, and Zn in a waste bed burning on the grate of an incinerator. The vaporization rates of the three heavy metals were derived from laboratory experiments. The kinetic law was then introduced into Garbed-ss, a mathematical model of the on-grate incineration of a refuse bed. Results show that the calculated vaporization of the three metals is fast, proceeds to nearly full completion, occurs at the pyrolysis front, and is indeed controlled by the thermal degradation of the waste. Alhough in agreement with thermodynamic calculations, the vaporization of lead and zinc seems to be overestimated. The model would be improved by accounting for the initial physical and chemical speciation of the heavy metals in the waste feed. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100181x [article] Modeling kinetics of Cd, Pb, and Zn vaporization during municipal solid waste bed incineration [texte imprimé] / Abhishek Asthana, Auteur ; Quentin Falcoz, Auteur ; Philippe Sessiecq, Auteur . - 2010 . - pp. 7605–7609. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp. 7605–7609 Mots-clés : Modeling  Kinetics Résumé : The fate of heavy metals contained in municipal solid waste is of major concern in the incineration process. This study is the first attempt to analyze the kinetic behavior of Cd, Pb, and Zn in a waste bed burning on the grate of an incinerator. The vaporization rates of the three heavy metals were derived from laboratory experiments. The kinetic law was then introduced into Garbed-ss, a mathematical model of the on-grate incineration of a refuse bed. Results show that the calculated vaporization of the three metals is fast, proceeds to nearly full completion, occurs at the pyrolysis front, and is indeed controlled by the thermal degradation of the waste. Alhough in agreement with thermodynamic calculations, the vaporization of lead and zinc seems to be overestimated. The model would be improved by accounting for the initial physical and chemical speciation of the heavy metals in the waste feed. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100181x

Modeling on - grate MSW incineration with experimental validation in a batch incinerator / Abhishek Asthana in Industrial & engineering chemistry research, Vol. 49 N° 16 (Août 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp 7597–7604 Titre : Modeling on - grate MSW incineration with experimental validation in a batch incinerator Type de document : texte imprimé Auteurs : Abhishek Asthana, Auteur ; Yannick Ménard, Auteur ; Philippe Sessiecq, Auteur Année de publication : 2010 Article en page(s) : pp 7597–7604 Note générale : Industrail chemistry Langues : Anglais (eng) Mots-clés : Solid  waste  incineration Résumé : This Article presents a 2-D steady-state model developed for simulating on-grate municipal solid waste incineration, termed GARBED-ss. Gas−solid reactions, gas flow through the porous waste particle bed, conductive, convective, and radiative heat transfer, drying and pyrolysis of the feed, the emission of volatile species, combustion of the pyrolysis gases, the formation and oxidation of char and its gasification by water vapor and carbon dioxide, and the consequent reduction of the bed volume are described in the bed model. The kinetics of the pyrolysis of cellulosic and noncellulosic materials were experimentally derived from experimental measurements. The simulation results provide a deep insight into the various phenomena involved in incineration, for example, the complete consumption of oxygen in a large zone of the bed and a consequent char-gasification zone. The model was successfully validated against experimental measurements in a laboratory batch reactor, using an adapted sister version in a transient regime. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100175e [article] Modeling on - grate MSW incineration with experimental validation in a batch incinerator [texte imprimé] / Abhishek Asthana, Auteur ; Yannick Ménard, Auteur ; Philippe Sessiecq, Auteur . - 2010 . - pp 7597–7604. Industrail chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp 7597–7604 Mots-clés : Solid  waste  incineration Résumé : This Article presents a 2-D steady-state model developed for simulating on-grate municipal solid waste incineration, termed GARBED-ss. Gas−solid reactions, gas flow through the porous waste particle bed, conductive, convective, and radiative heat transfer, drying and pyrolysis of the feed, the emission of volatile species, combustion of the pyrolysis gases, the formation and oxidation of char and its gasification by water vapor and carbon dioxide, and the consequent reduction of the bed volume are described in the bed model. The kinetics of the pyrolysis of cellulosic and noncellulosic materials were experimentally derived from experimental measurements. The simulation results provide a deep insight into the various phenomena involved in incineration, for example, the complete consumption of oxygen in a large zone of the bed and a consequent char-gasification zone. The model was successfully validated against experimental measurements in a laboratory batch reactor, using an adapted sister version in a transient regime. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100175e