| Grant number: | 14/11189-0 |
| Support Opportunities: | Regular Research Grants |
| Start date: | November 01, 2014 |
| End date: | October 31, 2017 |
| Field of knowledge: | Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials |
| Principal Investigator: | Silvania Lanfredi |
| Grantee: | Silvania Lanfredi |
| Host Institution: | Faculdade de Ciências e Tecnologia (FCT). Universidade Estadual Paulista (UNESP). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil |
| Associated researchers: | Elisabeth Djurado ; Marcos Augusto de Lima Nobre |
Abstract
The main objective of this project deals, in this first step, with the synthesis by spray pyrolysis of nanopowders based on titantes of double perovskite structure with stoichiometry Ca1-xKxTiCux/2O3, where x = 0.10 to 0.50, and of KSr2Nb5O15 and NaSr2Nb5O15 niobates of tetragonal tungsten bronze structure and their solid solutions containing nickel atoms: KSr2(NixNb5-x)O15-delta, NaSr2(NixNb5-x)O15-delta where x = 0.25 to 0.75. This technique is based on pyrolysis of an aerosol produced by ultrasonic atomizer. The mounting of the system for the synthesis via spray pyrolysis will have the collaboration of the Profa. Elisabeth Djurado du Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces de Grenoble - França. Profa. E. Djurado has large experience in this method of synthesis, whose variables were studied and optimized allowing to obtain nanostructured materials and with controlled morphology. The nanoparticles will be characterized by X-ray diffraction, with the refinement of structural parameters by Rietveld method, infrared spectroscopy (FTIR), thermal analysis (TGA and DSC) and scanning electron microscope (SEM). The second step is the analysis of the catalytic activity of the powders synthesized in the production of biodiesel from vegetable oils. For evaluation of the catalytic activity of powders will be carried out the textural characterization by the N2 adsorption using the BET. Among these catalysts, the Sr0.8K0.2TiCu0.1O3 compound has shown excellent catalytic activity for the production of biodiesel. The catalytic potential, to obtaining biodiesel, of Ca1-xKxTiCux/2O3 nanoparticles,where x = 0.10 to 0.50, KSr2Nb5O15, NaSr2Nb5O15 and their solid solutions containing nickel atoms will be investigated from vegetable oils. The catalytic activity will be evaluated as a function of time and temperature of the catalyst in the reaction mixture, molar ratio of oil / alcohol and amount of catalyst. Thus, technology transfer, under this project, and studies of materials synthesized by this technique are of great importance for the production of biodiesel in the country. (AU)
| Articles published in Agência FAPESP Newsletter about the research grant: |
| More itemsLess items |
| TITULO |
| Articles published in other media outlets ( ): |
| More itemsLess items |
| VEICULO: TITULO (DATA) |
| VEICULO: TITULO (DATA) |