Efficient catalytic ozonation by ruthenium nanoparticles supported on SiO2 or TiO2: Towards the use of a non-woven fiber paper as original support

Handle URI:
http://hdl.handle.net/10754/592612
Title:
Efficient catalytic ozonation by ruthenium nanoparticles supported on SiO2 or TiO2: Towards the use of a non-woven fiber paper as original support
Authors:
Biard, Pierre-François; Werghi, Baraa; Soutrel, Isabelle; Orhand, Romain; Couvert, Annabelle; Denicourt-Nowicki, Audrey; Roucoux, Alain
Abstract:
This work focuses on the use of Ru(0) nanoparticles as heterogeneous catalyst for ozone decomposition and radical production. In a first set of experiments, the nanoparticles have been deposited on two inorganic supports (TiO2 or SiO2) by a wet impregnation approach. This study confirmed the high potential of Ru nanoparticles as active species for ozone decomposition at pH 3, since the ozone half-life time decreases by a factor 20-25, compared to the reference experiment carried out without any catalyst. The enhancement of the ozone decomposition kinetics provided an improved radical production and a higher transient radical concentration in a shorten ozone exposure. Consequently, lower oxidant dosage and contact time would be necessary. Thus, very significant atrazine consumption kinetics enhancements were measured. In a second set of experiments, a non-woven fiber paper composed of a TiO2/SiO2/zeolite mixture has been evaluated as an original support for ruthenium nanoparticles. Even if lower ozone decomposition kinetics was observed compared to TiO2 or SiO2, this support would be a promising alternative to inorganic powders to avoid the catalyst recovery step and to design reactors such as tubular reactors. A new numerical procedure is presented for the evaluation of the transient HO° concentration and of the Rct.
KAUST Department:
KAUST Catalysis Center (KCC)
Citation:
Efficient catalytic ozonation by ruthenium nanoparticles supported on SiO2 or TiO2: Towards the use of a non-woven fiber paper as original support 2015 Chemical Engineering Journal
Publisher:
Elsevier BV
Journal:
Chemical Engineering Journal
Issue Date:
24-Dec-2015
DOI:
10.1016/j.cej.2015.12.051
Type:
Article
ISSN:
13858947
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S1385894715017222
Appears in Collections:
Articles; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorBiard, Pierre-Françoisen
dc.contributor.authorWerghi, Baraaen
dc.contributor.authorSoutrel, Isabelleen
dc.contributor.authorOrhand, Romainen
dc.contributor.authorCouvert, Annabelleen
dc.contributor.authorDenicourt-Nowicki, Audreyen
dc.contributor.authorRoucoux, Alainen
dc.date.accessioned2015-12-27T13:38:07Zen
dc.date.available2015-12-27T13:38:07Zen
dc.date.issued2015-12-24en
dc.identifier.citationEfficient catalytic ozonation by ruthenium nanoparticles supported on SiO2 or TiO2: Towards the use of a non-woven fiber paper as original support 2015 Chemical Engineering Journalen
dc.identifier.issn13858947en
dc.identifier.doi10.1016/j.cej.2015.12.051en
dc.identifier.urihttp://hdl.handle.net/10754/592612en
dc.description.abstractThis work focuses on the use of Ru(0) nanoparticles as heterogeneous catalyst for ozone decomposition and radical production. In a first set of experiments, the nanoparticles have been deposited on two inorganic supports (TiO2 or SiO2) by a wet impregnation approach. This study confirmed the high potential of Ru nanoparticles as active species for ozone decomposition at pH 3, since the ozone half-life time decreases by a factor 20-25, compared to the reference experiment carried out without any catalyst. The enhancement of the ozone decomposition kinetics provided an improved radical production and a higher transient radical concentration in a shorten ozone exposure. Consequently, lower oxidant dosage and contact time would be necessary. Thus, very significant atrazine consumption kinetics enhancements were measured. In a second set of experiments, a non-woven fiber paper composed of a TiO2/SiO2/zeolite mixture has been evaluated as an original support for ruthenium nanoparticles. Even if lower ozone decomposition kinetics was observed compared to TiO2 or SiO2, this support would be a promising alternative to inorganic powders to avoid the catalyst recovery step and to design reactors such as tubular reactors. A new numerical procedure is presented for the evaluation of the transient HO° concentration and of the Rct.en
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S1385894715017222en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Chemical Engineering Journal. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chemical Engineering Journal, 24 December 2015. DOI: 10.1016/j.cej.2015.12.051en
dc.subjectOzoneen
dc.subjectCatalysten
dc.subjectCatalytic ozonationen
dc.subjectRuthenium nanoparticlesen
dc.subjectMicropollutionen
dc.titleEfficient catalytic ozonation by ruthenium nanoparticles supported on SiO2 or TiO2: Towards the use of a non-woven fiber paper as original supporten
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.identifier.journalChemical Engineering Journalen
dc.eprint.versionPost-printen
dc.contributor.institutionÉcole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, 11 Allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7, Franceen
dc.contributor.institutionUniversité européenne de Bretagne, 5 boulevard Laënnec, 35000 Rennes, Franceen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorWerghi, Baraaen
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