Nitrous oxide decomposition in a real nitric acid plant gas stream with a RhOx/Ce0.9Pr0.1O2/alumina catalyst

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Title: Nitrous oxide decomposition in a real nitric acid plant gas stream with a RhOx/Ce0.9Pr0.1O2/alumina catalyst
Authors: Inger, Marek | Wilk, Marcin | Parres Esclapez, Sonia | Illán-Gómez, María José | Salinas Martínez de Lecea, Concepción | Bueno López, Agustín
Research Group/s: Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: N2O decomposition | Nitric acid plant | Greenhouse gas | Rh catalyst | Ce–Pr mixed oxide
Knowledge Area: Química Inorgánica
Issue Date: Dec-2013
Publisher: Wiley
Citation: Journal of Chemical Technology and Biotechnology. 2013, 88(12): 2233-2238. doi:10.1002/jctb.4092
Abstract: Background: N2O is a powerful greenhouse gas emitted in nitric acid plants, and emission control technologies are required. Results: A 0.25%Rh/50%Ce0.9Pr0.1O2/γ-Al2O3 catalyst has been prepared and tested for N2O decomposition in a real nitric acid plant gas stream. The catalyst is active enough to achieve 100% N2O removal, maintaining a constant catalytic activity after 40 h operation without deactivating. Characterization of the fresh and used catalyst, using different techniques, revealed no changes during the N2O decomposition experiments: (i) XRD and Raman spectroscopy show the fluorite structure of the Ce–Pr mixed oxide before and after the catalytic tests, (ii) the crystal size of the Ce–Pr mixed oxide particles and the BET surface area of the catalyst is maintained, evidencing no sintering of ceria particles, (iii) H2-TPR indicates that the reducibility of the catalyst is similar before and after the catalytic tests, revealing chemical stability, and (iv) TEM and XPS analysis indicated the high stability of the rhodium particle size and oxidation state. Conclusion: An active and stable catalyst with formulation 0.25%Rh/50%Ce0.9Pr0.1O2/γ-Al2O3 has been prepared and successfully tested for N2O decomposition in a real nitric acid plant gas stream.
Sponsor: The authors acknowledge the financial support of Generalitat Valenciana (Project Prometeo 2009/047) and EU (FEDER), and S. Parres the University of Alicante-CAM-Unión FENOSA for her thesis grant.
URI: http://hdl.handle.net/10045/40181
ISSN: 0268-2575 (Print) | 1097-4660 (Online)
DOI: 10.1002/jctb.4092
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2013 Society of Chemical Industry
Peer Review: si
Publisher version: http://dx.doi.org/10.1002/jctb.4092
Appears in Collections:INV - MCMA - Artículos de Revistas

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