Characterizations of nanostructured nickel aluminates as catalysts for conversion of glycerol: Influence of the preparation methods
| Autor: | Norma Amadeo, Josué Mendes Filho, Francisco F. de Sousa, Antonio S. B. Neto, María Laura Dieuzeide, Alcineia C. Oliveira, Alcemira C. Oliveira |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Coprecipitation General Chemical Engineering Aluminate Inorganic chemistry chemistry.chemical_element Nanoparticle Sintering INGENIERÍAS Y TECNOLOGÍAS 02 engineering and technology 010402 general chemistry NANOSTRUCTURES 01 natural sciences Catalysis chemistry.chemical_compound medicine Glycerol Dehydration PREPARATION METHOD CHARACTERIZATIONS GLYCEROL 021001 nanoscience & nanotechnology medicine.disease 0104 chemical sciences Ingeniería Química Nickel chemistry Chemical engineering Mechanics of Materials Otras Ingeniería Química NICKEL ALUMINATES 0210 nano-technology |
| Zdroj: | Advanced Powder Technology. 28:131-138 |
| ISSN: | 0921-8831 |
| Popis: | Three different preparation methods were applied to prepare nickel aluminates (i.e. nanocasting (NiAlN), coprecipitation (NiAlC) and wet impregnation (NiAlW) methods). All catalysts exhibited the NiAl2O4 phase besides that of NiO and γ-Al2O3. The NiAlN catalyst showed nanoparticles of the aforesaid oxides whereas NiAlxOy was the predominant phase found over NiAlW catalyst. The performances of the nickel aluminate-based catalysts were evaluated in glycerol dehydration to produce valuable chemical compounds through the dehydration of glycerol. The sintering effects were responsible for the decreased performance of NiAlC in glycerol dehydration. On the contrary, NiAlN is found to be deactivated due to the lesser stability of its supported nanoparticles, being the glycerol conversion of ca. 3.3% at the end of the reaction. Besides, the reaction efficiently proceeded on NiAlW, which had a high catalytic performance with 19.7% glycerol conversion to acetol and others products and no deactivation along of the time for 25 h of time on stream was observed. This was due to the stability of the NiAlxOy phase, which impeded phase transformation and was resistant to heavy coking. Fil: Neto, Antonio S. B.. Universidade Federal do Ceará; Brasil Fil: Oliveira, Alcemira C.. Universidade Federal do Ceará; Brasil Fil: Mendes Filho, Josué. Universidade Federal do Ceará; Brasil Fil: Amadeo, Norma Elvira. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Tecnologías del Hidrogeno y Energias Sostenibles. Universidad de Buenos Aires. Facultad de Ingeniería. Instituto de Tecnologías del Hidrogeno y Energias Sostenibles; Argentina Fil: Dieuzeide, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Tecnologías del Hidrogeno y Energias Sostenibles. Universidad de Buenos Aires. Facultad de Ingeniería. Instituto de Tecnologías del Hidrogeno y Energias Sostenibles; Argentina Fil: de Sousa, Francisco F.. Universidade Federal do Pará; Brasil Fil: Oliveira, Alcineia C.. Universidade Federal do Ceará; Brasil |
| Databáze: | OpenAIRE |
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