The chemical percolation devolatilization model applied to the devolatilization of coal in high intensity acoustic fields
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/195716 |
Resumo: | The chemical percolation devolatilization model (CPD) was extended for the prediction of drying and devolatilization of coal particles in high intensity acoustic fields found in Rijke tube reactors. The acoustic oscillations enhance the heat and mass transfer processes in the fuel bed as well as in the freeboard, above the grate. The results from simulations in a Rijke tube combustor have shown an increase in the rate of water evaporation and thermal degradation of the particles. The devolatilization model, based on chemical percolation, applied in pulsating regime allowed the dynamic prediction on the yields of CO, CO2, CH4, H2O, other light gases as well as tar which are important on ignition and stabilization of flames. The model predicted the quantity and form of nitrogen containing species generated during devolatilization, for which knowledge is strategically indispensable for reducing pollutant emissions (NOx) in flames under acoustic excitation. |
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The chemical percolation devolatilization model applied to the devolatilization of coal in high intensity acoustic fieldschemical percolation devolatilization modelacoustic fieldsRijke tubeThe chemical percolation devolatilization model (CPD) was extended for the prediction of drying and devolatilization of coal particles in high intensity acoustic fields found in Rijke tube reactors. The acoustic oscillations enhance the heat and mass transfer processes in the fuel bed as well as in the freeboard, above the grate. The results from simulations in a Rijke tube combustor have shown an increase in the rate of water evaporation and thermal degradation of the particles. The devolatilization model, based on chemical percolation, applied in pulsating regime allowed the dynamic prediction on the yields of CO, CO2, CH4, H2O, other light gases as well as tar which are important on ignition and stabilization of flames. The model predicted the quantity and form of nitrogen containing species generated during devolatilization, for which knowledge is strategically indispensable for reducing pollutant emissions (NOx) in flames under acoustic excitation.Univ Estadual Paulista, Dept Energia, BR-12516410 Guaratingueta, SP, BrazilUniv Brasilia, Dept Engn Mecan, BR-70910900 Brasilia, DF, BrazilInst Nacl Pesquisas Espaciais, Lab Assoc Combustao & Prop, BR-12630000 Cachoeira Paulista, SP, BrazilUniv Estadual Paulista, Dept Energia, BR-12516410 Guaratingueta, SP, BrazilSoc Brasileira QuimicaUniversidade Estadual Paulista (Unesp)Universidade de Brasília (UnB)Inst Nacl Pesquisas EspaciaisVeras, CAGCarvalho, J. A.Ferreira, M. A.2020-12-10T18:01:09Z2020-12-10T18:01:09Z2002-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article358-367Journal Of The Brazilian Chemical Society. Sao Paulo: Soc Brasileira Quimica, v. 13, n. 3, p. 358-367, 2002.0103-5053http://hdl.handle.net/11449/195716WOS:000175620200010Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of The Brazilian Chemical Societyinfo:eu-repo/semantics/openAccess2024-07-01T19:29:49Zoai:repositorio.unesp.br:11449/195716Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:32:01.489522Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
The chemical percolation devolatilization model applied to the devolatilization of coal in high intensity acoustic fields |
title |
The chemical percolation devolatilization model applied to the devolatilization of coal in high intensity acoustic fields |
spellingShingle |
The chemical percolation devolatilization model applied to the devolatilization of coal in high intensity acoustic fields Veras, CAG chemical percolation devolatilization model acoustic fields Rijke tube |
title_short |
The chemical percolation devolatilization model applied to the devolatilization of coal in high intensity acoustic fields |
title_full |
The chemical percolation devolatilization model applied to the devolatilization of coal in high intensity acoustic fields |
title_fullStr |
The chemical percolation devolatilization model applied to the devolatilization of coal in high intensity acoustic fields |
title_full_unstemmed |
The chemical percolation devolatilization model applied to the devolatilization of coal in high intensity acoustic fields |
title_sort |
The chemical percolation devolatilization model applied to the devolatilization of coal in high intensity acoustic fields |
author |
Veras, CAG |
author_facet |
Veras, CAG Carvalho, J. A. Ferreira, M. A. |
author_role |
author |
author2 |
Carvalho, J. A. Ferreira, M. A. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade de Brasília (UnB) Inst Nacl Pesquisas Espaciais |
dc.contributor.author.fl_str_mv |
Veras, CAG Carvalho, J. A. Ferreira, M. A. |
dc.subject.por.fl_str_mv |
chemical percolation devolatilization model acoustic fields Rijke tube |
topic |
chemical percolation devolatilization model acoustic fields Rijke tube |
description |
The chemical percolation devolatilization model (CPD) was extended for the prediction of drying and devolatilization of coal particles in high intensity acoustic fields found in Rijke tube reactors. The acoustic oscillations enhance the heat and mass transfer processes in the fuel bed as well as in the freeboard, above the grate. The results from simulations in a Rijke tube combustor have shown an increase in the rate of water evaporation and thermal degradation of the particles. The devolatilization model, based on chemical percolation, applied in pulsating regime allowed the dynamic prediction on the yields of CO, CO2, CH4, H2O, other light gases as well as tar which are important on ignition and stabilization of flames. The model predicted the quantity and form of nitrogen containing species generated during devolatilization, for which knowledge is strategically indispensable for reducing pollutant emissions (NOx) in flames under acoustic excitation. |
publishDate |
2002 |
dc.date.none.fl_str_mv |
2002-05-01 2020-12-10T18:01:09Z 2020-12-10T18:01:09Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Journal Of The Brazilian Chemical Society. Sao Paulo: Soc Brasileira Quimica, v. 13, n. 3, p. 358-367, 2002. 0103-5053 http://hdl.handle.net/11449/195716 WOS:000175620200010 |
identifier_str_mv |
Journal Of The Brazilian Chemical Society. Sao Paulo: Soc Brasileira Quimica, v. 13, n. 3, p. 358-367, 2002. 0103-5053 WOS:000175620200010 |
url |
http://hdl.handle.net/11449/195716 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal Of The Brazilian Chemical Society |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
358-367 |
dc.publisher.none.fl_str_mv |
Soc Brasileira Quimica |
publisher.none.fl_str_mv |
Soc Brasileira Quimica |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128668272164864 |