Fluidized Bed Combustion of High Ash Chars

The behavior of the fluidized bed combustion of high ash chars is analyzed by applying the two-phase theory, the gas flowing in plug flow both in the emulsion and bubble phases. The ash is assumed to remain attached to the char particle and therefore the shrinking core model is considered. Combustio...

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Detalles Bibliográficos
Autor principal: Lemcoff, Norberto Oscar
Publicado: 1988
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00102202_v62_n4-6_p131_Lemcoff
http://hdl.handle.net/20.500.12110/paper_00102202_v62_n4-6_p131_Lemcoff
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00102202_v62_n4-6_p131_Lemcoff
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spelling paper:paper_00102202_v62_n4-6_p131_Lemcoff2023-06-08T14:34:17Z Fluidized Bed Combustion of High Ash Chars Lemcoff, Norberto Oscar The behavior of the fluidized bed combustion of high ash chars is analyzed by applying the two-phase theory, the gas flowing in plug flow both in the emulsion and bubble phases. The ash is assumed to remain attached to the char particle and therefore the shrinking core model is considered. Combustion efficiency increases with bed temperature, excess air and ash content of char, as well as when the char mass flow rate and particle diameter decrease. The effect of excess air on the exit concentration is found to be related to the interphase mass transfer coefficient. The carbon monoxide concentration is reduced in the freeboard by two orders of magnitude due to its oxidation to carbon dioxide. These emissions are further reduced when preheated secondary air is introduced. © 1988, Taylor & Francis Group, LLC. All rights reserved. Fil:Lemcoff, N.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1988 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00102202_v62_n4-6_p131_Lemcoff http://hdl.handle.net/20.500.12110/paper_00102202_v62_n4-6_p131_Lemcoff
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The behavior of the fluidized bed combustion of high ash chars is analyzed by applying the two-phase theory, the gas flowing in plug flow both in the emulsion and bubble phases. The ash is assumed to remain attached to the char particle and therefore the shrinking core model is considered. Combustion efficiency increases with bed temperature, excess air and ash content of char, as well as when the char mass flow rate and particle diameter decrease. The effect of excess air on the exit concentration is found to be related to the interphase mass transfer coefficient. The carbon monoxide concentration is reduced in the freeboard by two orders of magnitude due to its oxidation to carbon dioxide. These emissions are further reduced when preheated secondary air is introduced. © 1988, Taylor & Francis Group, LLC. All rights reserved.
author Lemcoff, Norberto Oscar
spellingShingle Lemcoff, Norberto Oscar
Fluidized Bed Combustion of High Ash Chars
author_facet Lemcoff, Norberto Oscar
author_sort Lemcoff, Norberto Oscar
title Fluidized Bed Combustion of High Ash Chars
title_short Fluidized Bed Combustion of High Ash Chars
title_full Fluidized Bed Combustion of High Ash Chars
title_fullStr Fluidized Bed Combustion of High Ash Chars
title_full_unstemmed Fluidized Bed Combustion of High Ash Chars
title_sort fluidized bed combustion of high ash chars
publishDate 1988
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00102202_v62_n4-6_p131_Lemcoff
http://hdl.handle.net/20.500.12110/paper_00102202_v62_n4-6_p131_Lemcoff
work_keys_str_mv AT lemcoffnorbertooscar fluidizedbedcombustionofhighashchars
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