dc.creator | Cánepa, Analía Laura | |
dc.creator | Vaschetti, Virginia María | |
dc.creator | Pájaro, Karen C. | |
dc.creator | Eimer, Griselda Alejandra | |
dc.creator | Casuscelli, Sandra Graciela | |
dc.creator | Cortés Coberán, Vicente | |
dc.date.accessioned | 2020-01-03T17:18:59Z | |
dc.date.accessioned | 2022-10-15T16:53:27Z | |
dc.date.available | 2020-01-03T17:18:59Z | |
dc.date.available | 2022-10-15T16:53:27Z | |
dc.date.created | 2020-01-03T17:18:59Z | |
dc.date.issued | 2019-10-19 | |
dc.identifier | Cánepa, Analía Laura; Vaschetti, Virginia María; Pájaro, Karen C.; Eimer, Griselda Alejandra; Casuscelli, Sandra Graciela; et al.; Selective oxidation of ethanol on V-MCM-41 catalysts; Elsevier Science; Catalysis Today; 19-10-2019 | |
dc.identifier | 0920-5861 | |
dc.identifier | http://hdl.handle.net/11336/93413 | |
dc.identifier | CONICET Digital | |
dc.identifier | CONICET | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4411807 | |
dc.description.abstract | Catalysts V-MCM-41 with different V contents (0.09-0.90 wt.%), synthesized by the template ion-exchange (TIE) method, have been investigated for acetaldehyde production by selective oxidation of ethanol, studying the effects of reaction temperature, O2/ethanol molar ratio and V content of the catalyst. The catalysts were characterized by X-ray diffraction (XRD), Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES), diffuse reflectance UV–vis spectroscopy (UV–vis-DR), N2 adsorption and Fourier transform infrared spectroscopy (FT-IR) with pyridine adsorption. All the catalysts showed good structural regularity and high specific areas. Analysis by UV–vis-DR showed the presence of different V species: isolated V cations incorporated to the siliceous structure or on the pore wall, clusters with different sizes and segregated nano-oxides in different proportions depending on the V content. Under the reaction conditions explored, the maximum acetaldehyde selectivity (90.5%) was reached at 623 K but the maximum yield (48% yield with 77% selectivity) was reached at 673 K, using a feed molar ratio O2/ethanol = 1. The activity of the catalysts decreased with the increase in V contents, due to the different type and increasing aggregation of V species, the most active catalyst being the one with the highest dispersion of isolated tetrahedral V species. | |
dc.language | eng | |
dc.publisher | Elsevier Science | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0920586119305474 | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.cattod.2019.09.052 | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/restrictedAccess | |
dc.subject | ACETALDEHYDE | |
dc.subject | ETHANOL | |
dc.subject | SELECTIVE OXIDATION | |
dc.subject | TEMPLATE-ION EXCHANGE | |
dc.subject | V-MCM-41 | |
dc.subject | VANADIUM CATALYSTS | |
dc.title | Selective oxidation of ethanol on V-MCM-41 catalysts | |
dc.type | info:eu-repo/semantics/article | |
dc.type | info:ar-repo/semantics/artículo | |
dc.type | info:eu-repo/semantics/publishedVersion | |