Franch Martí, C.; Alonso Escobar, C.; Jorda Moret, JL.; Peral, I.; Hernandez Fenollosa, J.; Corma Canós, A.; Palomares Gimeno, AE.... (2012). TNU-9, a new zeolite for the selective catalytic reduction of NO: An in-situ X-ray absorption spectroscopy study. Journal of Catalysis. 295:22-30. https://doi.org/10.1016/j.jcat.2012.07.011
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/105412
Título:
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TNU-9, a new zeolite for the selective catalytic reduction of NO: An in-situ X-ray absorption spectroscopy study
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Autor:
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Franch Martí, Cristina
Alonso Escobar, Cristina
Jorda Moret, Jose Luis
Peral, Inmaculada
Hernandez Fenollosa, Juan
Corma Canós, Avelino
Palomares Gimeno, Antonio Eduardo
Rey Garcia, Fernando
Guilera, Gemma
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Entidad UPV:
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Universitat Politècnica de València. Departamento de Ingeniería Química y Nuclear - Departament d'Enginyeria Química i Nuclear
Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química
Universitat Politècnica de València. Departamento de Química - Departament de Química
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Fecha difusión:
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Resumen:
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[EN] The medium-pore zeolite TNU-9 was prepared and studied for the selective catalytic reduction (SCR) of NO using C3H8 as the reducing agent. The catalytic activities of copper- and cobalt-exchanged TNU-9 zeolites are ...[+]
[EN] The medium-pore zeolite TNU-9 was prepared and studied for the selective catalytic reduction (SCR) of NO using C3H8 as the reducing agent. The catalytic activities of copper- and cobalt-exchanged TNU-9 zeolites are compared with those of other active metal-exchanged zeolites previously studied, such as Cu- and Co-Beta, IM-5, and ZSM-5. The catalytic results obtained on TNU-9 zeolites at different oxygen content and different temperatures are similar to those observed with the other known highly active zeolites but with the advantage of TNU-9 having almost the same catalytic performance in the presence of H2O during the reaction. The nature and behavior of Cu and Co active sites contained in the TNU-9 catalysts have been studied under operating conditions using X-ray absorption spectroscopy. After catalyst activation at 550 degrees C under He, mostly reduced Cu1+ and Co2-x species are detected. Nevertheless, the activated catalysts show a very low reaction rate for the SCR of NOx in the absence of O-2. However, when O-2 is introduced into the reaction stream, a mixed-valence system is observed, as well as an important increase in the catalytic reaction rate. The results obtained show that the presence of metal sites having different oxidation states in the catalyst is mandatory for obtaining good results in the NOx SCR reaction. (C) 2012 Elsevier Inc. All rights reserved.
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Palabras clave:
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NO SCR
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TNU-9
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Cobalt
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Copper
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In-situ XAS zeolite
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Propane
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Derechos de uso:
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Cerrado |
Fuente:
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Journal of Catalysis. (issn:
0021-9517
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DOI:
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10.1016/j.jcat.2012.07.011
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Editorial:
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ACADEMIC PRESS INC ELSEVIER SCIENCE
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Versión del editor:
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http://doi.org/10.1016/j.jcat.2012.07.011
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Código del Proyecto:
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info:eu-repo/grantAgreement/MICINN//MAT2009-14528-C02-01/ES/Sintesis, Caracterizacion Avanzada Y Empleo En Procesos Industriales De Nuevas Zeolitas Obtenidos Con Cationes Organicos No Convencionales Como Agentes Directores De Estructura/
info:eu-repo/grantAgreement/MINECO//BES-2013-064347/ES/BES-2013-064347/
info:eu-repo/grantAgreement/MICINN//ICTS-2008-18/ES/Celdas de reacción para estudio catalizadores/
info:eu-repo/grantAgreement/MICINN//MAT2009-14528-C02-02/ES/Subproyecto: Caracterizacion De Catalizadores Porosos Mediante Tecnicas De Luz Sincrotron/
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Agradecimientos:
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We acknowledge the MICINN (Projects ICTS-2008-18, MAT2009-14528-C02-01, and MAT2009-14528-C02-02) for financial support. C.A.E thanks MICINN for a FPI fellowship. The authors thank the SLS and the ESRF synchrotron facilities ...[+]
We acknowledge the MICINN (Projects ICTS-2008-18, MAT2009-14528-C02-01, and MAT2009-14528-C02-02) for financial support. C.A.E thanks MICINN for a FPI fellowship. The authors thank the SLS and the ESRF synchrotron facilities for the beamtime allocated, and M. Nachtegaal and I. da Silva for the support given at the Super-XAS (SLS) and SpLine (ESRF) beamlines, respectively. We thank J. J. Cortes for his work on the construction of the in situ cells. The authors thank Dr. Susana Valencia for supplying the IM-5 and TNU-9 samples used in this work.
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Tipo:
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Artículo
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