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dc.contributor.author
Lónyi, Ferenc
dc.contributor.author
Solt, Hanna E.
dc.contributor.author
Valyon, József
dc.contributor.author
Boix, Alicia Viviana
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dc.contributor.author
Gutierrez, Laura Beatriz
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dc.date.available
2018-07-23T18:56:22Z
dc.date.issued
2012-05
dc.identifier.citation
Lónyi, Ferenc; Solt, Hanna E.; Valyon, József; Boix, Alicia Viviana; Gutierrez, Laura Beatriz; The SCR of NO with methane over In,H- and Co,In,H-ZSM-5 catalysts: The promotional effect of cobalt; Elsevier Science; Applied Catalysis B: Environmental; 117-118; 5-2012; 212-223
dc.identifier.issn
0926-3373
dc.identifier.uri
http://hdl.handle.net/11336/52867
dc.description.abstract
Zeolite In,H-, Co,H-, and Co,In,H-ZSM-5 were characterized by operando diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), temperature-programmed reduction by hydrogen (H2-TPR), X-ray photoelectron spectroscopy (XPS), and activity in the selective catalytic reduction of NO (NO-SCR) by methane. The catalysts were shown to contain indium as [InO]+/[InOH]2+ cations, whereas cobalt was in the form of Co2+/[Co-OH]+ cations or Co-oxide clusters in amounts controlled by the applied preparation method. The NO-SCR by methane was shown to proceed in two coupled processes on distinctly different catalytic sites. One of the processes is the oxidation of NO to NO2 by oxygen over Brønsted acid sites and/or cobalt-oxide species giving NO/NO2 gas mixture (NO-COX reaction). The other process is the N2 formation, which is the result of the reaction of methane and the NO/NO2 mixture (CH4/NO-SCR reaction). Molecules of NO and NO2 were shown to become activated together as NO+/NO3− ion pair in reaction with [InO]+/[InOH]2+ or Co2+/[Co-OH]+ sites. Operando DRIFTS results suggested that the reaction of methane and NO3− generates an intermediate that rapidly reacts with the NO+ to give N2. The promoting effect of the cobalt was related to the significantly higher NO-COX activity of Co-oxide clusters than that of the Brønsted acid sites. The accelerated NO-COX reaction speeds up the formation of NO+/NO3− species and the rate of the methane activation, being the rate-determining step of the NO-SCR reaction. It was also shown that the NO-SCR reaction can proceed if NO-COX and CH4/NO-SCR active sites are separated in space. In order to avoid rate controlling NO2 transport between the sites close proximity of the sites is favorable.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
In,H-Zsm-5 Catalyst
dc.subject
Operando Drifts
dc.subject
No-Scr by Ch4
dc.subject
Promotion by Co
dc.subject.classification
Otras Ingeniería Química
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dc.subject.classification
Ingeniería Química
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
The SCR of NO with methane over In,H- and Co,In,H-ZSM-5 catalysts: The promotional effect of cobalt
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-07-20T14:18:13Z
dc.journal.volume
117-118
dc.journal.pagination
212-223
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Lónyi, Ferenc. Hungarian Academy of Sciences; Hungría
dc.description.fil
Fil: Solt, Hanna E.. Hungarian Academy of Sciences; Hungría
dc.description.fil
Fil: Valyon, József. Hungarian Academy of Sciences; Hungría
dc.description.fil
Fil: Boix, Alicia Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina
dc.description.fil
Fil: Gutierrez, Laura Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina
dc.journal.title
Applied Catalysis B: Environmental
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.apcatb.2012.01.022
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0926337312000239
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