Kinetic and wet oxidation of phenol catalyzed by non-promoted and potassium-promoted manganese/cerium oxide

The wet oxidation of organic compounds to CO2 and H2O has been shown to be a very efficient technique in the outflows treatment. This work focuses on the interaction of the chemical element potassium with the catalyst MnO2–CeO2 in the wet degradation of phenol. The reaction has been carried out in a...

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Principais autores:	Santiago, Aristides Felipe J., Sousa, João Fernandes de, Guedes, Rodrigo Caetano, Jerônimo, Carlos Enrique de Medeiros, Benachour, Mohand
Formato:	article
Idioma:	English
Publicado em:	Elsevier
Assuntos:	Slurry reactor Kinetic model Phenol Potassium Catalytic wet oxidation
Endereço do item:	https://repositorio.ufrn.br/handle/123456789/40838
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spelling	ri-123456789-408382021-09-29T19:53:06Z Kinetic and wet oxidation of phenol catalyzed by non-promoted and potassium-promoted manganese/cerium oxide Santiago, Aristides Felipe J. Sousa, João Fernandes de Guedes, Rodrigo Caetano Jerônimo, Carlos Enrique de Medeiros Benachour, Mohand Slurry reactor Kinetic model Phenol Potassium Catalytic wet oxidation The wet oxidation of organic compounds to CO2 and H2O has been shown to be a very efficient technique in the outflows treatment. This work focuses on the interaction of the chemical element potassium with the catalyst MnO2–CeO2 in the wet degradation of phenol. The reaction has been carried out in an autoclave with a controlled system of agitation, pressure, temperature and sampling of the liquid phase. The experiments were performed in the presence of the catalysts MnO2–CeO2 and K–MnO2–CeO2 in the following operational conditions: temperature of 130 °C, P = 20.4 atm, catalyst concentration in the range 1.5–5.0 g/L, initial phenol concentration of 0.5 g/L, initial pH varying between 6.8 and 8.5, and percentage of potassium in the catalyst MnO2–CeO2 ranging between 0% and 10%. Curves indicating the profile of conversion of total organic carbon show that the phenol degradation is favored when the potassium quantity is reduced. This behaviour is confirmed by BET analysis, whereby the catalyst presents larger specific area when compared to the percentages of other components. Regardless of the catalyst used in the phenol oxidation, the kinetic constant of reaction had the same order of magnitude for two parallel stages proposed by a first-order kinetic model 2021-09-29T19:53:05Z 2021-09-29T19:53:05Z 2006-11-10 article SANTIAGO, Aristides Felipe; SOUSA, J. F.; GUEDES, Rodrigo Caetano; JERÔNIMO, Carlos Enrique de Medeiros ; BENACHOUR, Mohand . Kinetic and wet oxidation of phenol catalyzed by non-promoted and potassium-promoted manganese/cerium oxide.. Journal of Hazardous Materials (Print), v. B1, p. 325-330, 2006. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0304389406007916#!. Acesso em: 29 set. 2021. https://doi.org/10.1016/j.jhazmat.2006.05.118 0304-3894 https://repositorio.ufrn.br/handle/123456789/40838 10.1016/j.jhazmat.2006.05.118 en Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ application/pdf Elsevier
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Slurry reactor Kinetic model Phenol Potassium Catalytic wet oxidation
spellingShingle	Slurry reactor Kinetic model Phenol Potassium Catalytic wet oxidation Santiago, Aristides Felipe J. Sousa, João Fernandes de Guedes, Rodrigo Caetano Jerônimo, Carlos Enrique de Medeiros Benachour, Mohand Kinetic and wet oxidation of phenol catalyzed by non-promoted and potassium-promoted manganese/cerium oxide
description	The wet oxidation of organic compounds to CO2 and H2O has been shown to be a very efficient technique in the outflows treatment. This work focuses on the interaction of the chemical element potassium with the catalyst MnO2–CeO2 in the wet degradation of phenol. The reaction has been carried out in an autoclave with a controlled system of agitation, pressure, temperature and sampling of the liquid phase. The experiments were performed in the presence of the catalysts MnO2–CeO2 and K–MnO2–CeO2 in the following operational conditions: temperature of 130 °C, P = 20.4 atm, catalyst concentration in the range 1.5–5.0 g/L, initial phenol concentration of 0.5 g/L, initial pH varying between 6.8 and 8.5, and percentage of potassium in the catalyst MnO2–CeO2 ranging between 0% and 10%. Curves indicating the profile of conversion of total organic carbon show that the phenol degradation is favored when the potassium quantity is reduced. This behaviour is confirmed by BET analysis, whereby the catalyst presents larger specific area when compared to the percentages of other components. Regardless of the catalyst used in the phenol oxidation, the kinetic constant of reaction had the same order of magnitude for two parallel stages proposed by a first-order kinetic model
format	article
author	Santiago, Aristides Felipe J. Sousa, João Fernandes de Guedes, Rodrigo Caetano Jerônimo, Carlos Enrique de Medeiros Benachour, Mohand
author_facet	Santiago, Aristides Felipe J. Sousa, João Fernandes de Guedes, Rodrigo Caetano Jerônimo, Carlos Enrique de Medeiros Benachour, Mohand
author_sort	Santiago, Aristides Felipe J.
title	Kinetic and wet oxidation of phenol catalyzed by non-promoted and potassium-promoted manganese/cerium oxide
title_short	Kinetic and wet oxidation of phenol catalyzed by non-promoted and potassium-promoted manganese/cerium oxide
title_full	Kinetic and wet oxidation of phenol catalyzed by non-promoted and potassium-promoted manganese/cerium oxide
title_fullStr	Kinetic and wet oxidation of phenol catalyzed by non-promoted and potassium-promoted manganese/cerium oxide
title_full_unstemmed	Kinetic and wet oxidation of phenol catalyzed by non-promoted and potassium-promoted manganese/cerium oxide
title_sort	kinetic and wet oxidation of phenol catalyzed by non-promoted and potassium-promoted manganese/cerium oxide
publisher	Elsevier
publishDate	2021
url	https://repositorio.ufrn.br/handle/123456789/40838
work_keys_str_mv	AT santiagoaristidesfelipej kineticandwetoxidationofphenolcatalyzedbynonpromotedandpotassiumpromotedmanganeseceriumoxide AT sousajoaofernandesde kineticandwetoxidationofphenolcatalyzedbynonpromotedandpotassiumpromotedmanganeseceriumoxide AT guedesrodrigocaetano kineticandwetoxidationofphenolcatalyzedbynonpromotedandpotassiumpromotedmanganeseceriumoxide AT jeronimocarlosenriquedemedeiros kineticandwetoxidationofphenolcatalyzedbynonpromotedandpotassiumpromotedmanganeseceriumoxide AT benachourmohand kineticandwetoxidationofphenolcatalyzedbynonpromotedandpotassiumpromotedmanganeseceriumoxide
_version_	1773964852084080640

Kinetic and wet oxidation of phenol catalyzed by non-promoted and potassium-promoted manganese/cerium oxide

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