Author, as appears in the article.: Gebretsadik, F. B.; Cesteros, Y.; Salagre, P.; Gimenez-Manogil, J.; Garcia-Garcia, A.; Bueno-Lopez, A.;
Department: Química Física i Inorgànica
URV's Author/s: Cesteros Fernández, Yolanda / Salagre Carnero, María Pilar
Keywords: Saponite Polymer Physicochemical properties Oxidation Microwave-assisted synthesis Hectorites Emissions Clay-minerals Catalysts
Abstract: H- and Na-saponite supports have been prepared by several synthesis approaches. 5% Cu/saponite catalysts have been prepared and tested for soot combustion in a NOx + O-2 + N-2 gas flow and with soot and catalyst mixed in loose contact mode. XRD, FT-IR, N-2 adsorption and TEM characterization results revealed that the use of either surfactant or microwaves during the synthesis led to delamination of the saponite support, yielding high surface area and small crystallite size materials. The degree of delamination affected further copper oxide dispersion and soot combustion capacity of the Cu/saponite catalysts. All Cu/saponite catalysts were active for soot combustion, and the NO2-assisted mechanism seemed to prevail. The best activity was achieved with copper oxide supported on a Na-saponite prepared at pH 13 and with surfactant. This best activity was attributed to the efficient copper oxide dispersion on the high surface area delaminated saponite (603 m(2) g(-1)) and to the presence of Na. Copper oxide reduction in H-2-TPR experiments occurred at lower temperature for the Na-containing catalysts than for the H-containing counterparts, and all Cu/Na-saponite catalysts were more active for soot combustion than the corresponding Cu/H-saponite catalysts.
Thematic Areas: Química Materiais Farmacia Engenharias ii Engenharias i Ciências biológicas ii Ciências biológicas i Ciências agrárias i Ciência de alimentos Chemistry, physical Catalysis Biotecnología Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: yolanda.cesteros@urv.cat
Author identifier: 0000-0002-5439-9358
Record's date: 2024-09-07
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://pubs.rsc.org/en/content/articlelanding/2016/cy/c5cy00811e
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Catalysis Science & Technology. 6 (2): 507-514
APA: Gebretsadik, F. B.; Cesteros, Y.; Salagre, P.; Gimenez-Manogil, J.; Garcia-Garcia, A.; Bueno-Lopez, A.; (2016). Potential of Cu-saponitecatalystsfor soot combustion. Catalysis Science & Technology, 6(2), 507-514. DOI: 10.1039/C5CY00811E
Article's DOI: 10.1039/C5CY00811E
Entity: Universitat Rovira i Virgili
Journal publication year: 2016
Publication Type: Journal Publications