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Título: | Preparation of nitrogen-containing carbon nanotubes and study of their performance as basic catalysts |
Autor: | Faba, Laura; Criado, Yolanda A.; Gallegos-Suárez, Esteban CSIC; Pérez-Cadenas, María; Díaz, Eva; Rodríguez-Ramos, Inmaculada CSIC ORCID ; Guerrero-Ruiz, Antonio CSIC ORCID; Ordóñez, Salvador | Palabras clave: | Ketonization Biomass upgrading Pyridinic species Decarboxylative condensation Aldol condensation Doped carbon nanotubes |
Fecha de publicación: | 10-may-2013 | Editor: | Elsevier | Citación: | Applied Catalysis A: General 458: 155-161 (2013) | Resumen: | Nitrogen-containing carbon nanotubes were prepared, characterized and used as catalysts for two reactions of interest in the biomass upgrading processes: acetone aldol and acetic acid decarboxylative condensations. N-CNT were synthesized in a fluidized bed reactor by catalytic chemical vapor decomposition of acetonitrile on iron-, cobalt- and nickel-supported catalysts. Ni-N-CNT catalyst exhibits the highest activity, attributed to the surface concentration of basic sites, particularly the pyridinic species detected by X-ray photoelectron spectra (XPS). Likewise, the selectivity toward the final products of the reaction pathway is related both to the strength of basic sites (Ni-N-CNT) and to the morphology and chemical environment of the active sites (Fe-N-CNT). Synthesized catalysts show high stability for acetone condensation, whereas for ketonic condensation the catalyst stability decreases, mainly due to acic–base interactions with the active sites. | Versión del editor: | https://doi.org/10.1016/j.apcata.2013.03.041 | URI: | http://hdl.handle.net/10261/182354 | DOI: | 10.1016/j.apcata.2013.03.041 | ISSN: | 0926-860X |
Aparece en las colecciones: | (ICP) Artículos |
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