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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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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)