Catalytic and Noncatalytic Wet Oxidation of Formaldehyde. A Novel Kinetic Model
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/10587 https://doi.org/10.1021/ie030090r |
Resumo: | Formaldehyde is a carcinogen compound and one of the most important pollutants contained in wastewaters. Three different treatments were evaluated in a high-pressure batch reactor for the total organic carbon (TOC) degradation of formaldehyde solutions: thermolysis, noncatalytic wet oxidation, and catalytic wet oxidation over a CuO−ZnO/Al2O3 catalyst. The absence of the catalyst leads to a predominant induction period (30 min) without changes in TOC concentrations, while the catalytic treatment leads to significant enhancement in TOC reduction. In the catalytic experiments, an asymptotic behavior was observed with a final TOC reduction of approximately 80%, with the remaining nonoxidizable TOC being due to methanol, a refractory compound contained in the formaldehyde solution that is resistant to oxidation even with increasing temperature and pressure. Formic acid was identified as an intermediary compound, and a new kinetic model was developed, designed as the modified generalized kinetic model, to account for refractory and nonoxidizable compounds. Moreover, leaching of the catalyst in the liquid phase was not significant, and the carbon adsorption capacity was not detected. |
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7160 |
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Catalytic and Noncatalytic Wet Oxidation of Formaldehyde. A Novel Kinetic ModelFormaldehyde is a carcinogen compound and one of the most important pollutants contained in wastewaters. Three different treatments were evaluated in a high-pressure batch reactor for the total organic carbon (TOC) degradation of formaldehyde solutions: thermolysis, noncatalytic wet oxidation, and catalytic wet oxidation over a CuO−ZnO/Al2O3 catalyst. The absence of the catalyst leads to a predominant induction period (30 min) without changes in TOC concentrations, while the catalytic treatment leads to significant enhancement in TOC reduction. In the catalytic experiments, an asymptotic behavior was observed with a final TOC reduction of approximately 80%, with the remaining nonoxidizable TOC being due to methanol, a refractory compound contained in the formaldehyde solution that is resistant to oxidation even with increasing temperature and pressure. Formic acid was identified as an intermediary compound, and a new kinetic model was developed, designed as the modified generalized kinetic model, to account for refractory and nonoxidizable compounds. Moreover, leaching of the catalyst in the liquid phase was not significant, and the carbon adsorption capacity was not detected.American Chemical Society2003-10-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/10587http://hdl.handle.net/10316/10587https://doi.org/10.1021/ie030090rengIndustrial & Engineering Chemistry Research. 42:21 (2003) 5099-51080888-5885Silva, Adrián M. T.Quinta-Ferreira, Rosa M.Levec, Janezinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-05-29T09:42:38Zoai:estudogeral.uc.pt:10316/10587Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:59:20.069719Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Catalytic and Noncatalytic Wet Oxidation of Formaldehyde. A Novel Kinetic Model |
title |
Catalytic and Noncatalytic Wet Oxidation of Formaldehyde. A Novel Kinetic Model |
spellingShingle |
Catalytic and Noncatalytic Wet Oxidation of Formaldehyde. A Novel Kinetic Model Silva, Adrián M. T. |
title_short |
Catalytic and Noncatalytic Wet Oxidation of Formaldehyde. A Novel Kinetic Model |
title_full |
Catalytic and Noncatalytic Wet Oxidation of Formaldehyde. A Novel Kinetic Model |
title_fullStr |
Catalytic and Noncatalytic Wet Oxidation of Formaldehyde. A Novel Kinetic Model |
title_full_unstemmed |
Catalytic and Noncatalytic Wet Oxidation of Formaldehyde. A Novel Kinetic Model |
title_sort |
Catalytic and Noncatalytic Wet Oxidation of Formaldehyde. A Novel Kinetic Model |
author |
Silva, Adrián M. T. |
author_facet |
Silva, Adrián M. T. Quinta-Ferreira, Rosa M. Levec, Janez |
author_role |
author |
author2 |
Quinta-Ferreira, Rosa M. Levec, Janez |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Silva, Adrián M. T. Quinta-Ferreira, Rosa M. Levec, Janez |
description |
Formaldehyde is a carcinogen compound and one of the most important pollutants contained in wastewaters. Three different treatments were evaluated in a high-pressure batch reactor for the total organic carbon (TOC) degradation of formaldehyde solutions: thermolysis, noncatalytic wet oxidation, and catalytic wet oxidation over a CuO−ZnO/Al2O3 catalyst. The absence of the catalyst leads to a predominant induction period (30 min) without changes in TOC concentrations, while the catalytic treatment leads to significant enhancement in TOC reduction. In the catalytic experiments, an asymptotic behavior was observed with a final TOC reduction of approximately 80%, with the remaining nonoxidizable TOC being due to methanol, a refractory compound contained in the formaldehyde solution that is resistant to oxidation even with increasing temperature and pressure. Formic acid was identified as an intermediary compound, and a new kinetic model was developed, designed as the modified generalized kinetic model, to account for refractory and nonoxidizable compounds. Moreover, leaching of the catalyst in the liquid phase was not significant, and the carbon adsorption capacity was not detected. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-10-15 |
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 |
http://hdl.handle.net/10316/10587 http://hdl.handle.net/10316/10587 https://doi.org/10.1021/ie030090r |
url |
http://hdl.handle.net/10316/10587 https://doi.org/10.1021/ie030090r |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Industrial & Engineering Chemistry Research. 42:21 (2003) 5099-5108 0888-5885 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
American Chemical Society |
publisher.none.fl_str_mv |
American Chemical Society |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799133884200255488 |