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dc.contributor.author
Lovato, Maria Eugenia
dc.contributor.author
Martin, Carlos Alberto
dc.contributor.author
Cassano, Alberto Enrique
dc.date.available
2017-07-28T20:54:47Z
dc.date.issued
2009-12
dc.identifier.citation
Lovato, Maria Eugenia; Martin, Carlos Alberto; Cassano, Alberto Enrique; A Reaction Kinetic Model for Ozone Decomposition in Aqueous Media valid for Neutral and Acidic pH; Elsevier Science Sa; Chemical Engineering Journal; 146; 3; 12-2009; 486-497
dc.identifier.issn
1385-8947
dc.identifier.uri
http://hdl.handle.net/11336/21604
dc.description.abstract
A kinetic scheme for ozone decomposition in aqueous media has been developed. It can be applied for an extended range of pHs from acidic to neutral operating conditions. All experiments were made in a homogeneous medium under an assured kinetic controlling regime. Under no circumstances, a headspace existed in the reactor volume. The starting point of the reaction was always under the prerequisite of a true state of initial equilibrium conditions for the mixture water?ozone?oxygen. The model, that is not intended to be a true reaction mechanism,was derived fromthe 18 reaction steps mechanism proposed by Bühler et al. [R.E. Bühler, J. Staehelin, J. Hoigné, Ozone decomposition inwater studied by pulse radiolysis. 1. HO2/O2− and HO3/O3− as intermediates, J. Phys. Chem. 88 (1984) 2560?2564] and Staehelin et al. [J. Staehelin, R.E. Bühler, J. Hoigné, Ozone decomposition inwater studied by pulse radiolysis. 2. OH and HO4 as chain intermediates, J. Phys. Chem. 88 (1984) 5999?6004]. Most of the kinetic constants are known, but unfortunately they have not been obtained at the same pH (variations from 0.9 to almost 13 exist) and in one particular case was the result of a parametric estimation resorting to assumptions about the value of four other unknown constants in the proposed reaction sequence. With an accurate phenomenological modification represented by an analytical expression, a function of pH was introduced in what was found to be the most critical constant of the previously mentioned mechanism. The resulting set of reactions steps reproduces with very good agreement experiments made at pH 3, 4.8 and 6.3. These results should be useful to be applied as background information to analyze the use of ozone to degrading chlorinated organic compounds that render reaction by products (HCl), which reduce the pH of the reacting medium along the reaction evolution. Thus, the ultimate objective of this work is to derive a working and practical reaction sequence valid under these variable operating conditions.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science Sa
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Ozone
dc.subject
Thermal Decomposition
dc.subject
Semi-Empirical Kinetic Model
dc.subject
Acidic And Neutral Conditions
dc.subject.classification
Ingeniería Química
dc.subject.classification
Ingeniería Química
dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
dc.title
A Reaction Kinetic Model for Ozone Decomposition in Aqueous Media valid for Neutral and Acidic pH
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-07-28T15:14:55Z
dc.journal.volume
146
dc.journal.number
3
dc.journal.pagination
486-497
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Lovato, Maria Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
dc.description.fil
Fil: Martin, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
dc.description.fil
Fil: Cassano, Alberto Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
dc.journal.title
Chemical Engineering Journal
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.cej.2008.11.001
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1385894708007134


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