Gondim, Amanda DuarteStossberg, Misson Marques2019-07-222021-09-272019-07-222021-09-272018-12-06STOSSBERG, Misson Marques. Produção de Biodiesel a partir da Reação de Transesterificação por Rota Metílica utilizando Óxido Bimetálico (Ca/Nb). 2018. 74f. Trabalho de Conclusão de Curso (Graduação em Química Bacharelado) - Centro de Ciências Exatas da Terra, Instituto de Química, Universidade Federal do Rio Grande do Norte, Natal, 2018.https://repositorio.ufrn.br/handle/123456789/38200In modern times, there is a great demand for renewable energies due to the use of fossil fuels cause environmental problems such as the emission of the greenhouse effect. Thus, biodiesel becomes an alternative to diesel replacement. Biodiesel consists of a fuel derived from vegetable oils and animal fats, which are formed by alkyl esters, fatty acid esters and long chain carboxylic acids through the transesterification reaction. The catalysts most used for the transesterification process are the homogeneous ones, but they present a high toxicity and difficulty for the separation of the final product. Therefore, a heterogeneous catalyst (CaO / Nb2O5) was used in this work, which has as main objective to synthesize and characterize the catalyst (CaO / Nb2O5), besides applying the catalyst in the transesterification reaction of the cotton oil in search of better reactions. The biodiesel obtained was evaluated by thermal analysis (TGA / DTG), Fourier transform infrared (FTIR), density, viscosity, acidity index and nuclear magnetic resonance (NMR). The synthesis of the bi-metallic oxide was made in the 1: 1 molar ratio of Ca / Nb and then calcined at 600 ° C. The X-ray diffraction (XRD), Thermal Analysis (TGA / DTG), Infrared Spectroscopy with Fourier Transform (FTIR) and Scanning Electron Microscopy (SEM) techniques were applied to confirm the catalyst acquisition. The cotton oil was analyzed by thermogravimetry to obtain mass loss with temperature variation as a function of time, in addition to all other analyzes made with biodiesis. The catalyst was applied in the transesterification reaction by a methanol: 1:15 molar ratio, 10% catalyst, for 5 hours, with temperature variation of 60ºC, 90ºC and 120ºC, and thus, the biodiesel obtained showed a small conversion rate of triglycerides to esters.BiocombustíveisBiofuels.TransesterificaçãoBiodieselCatalisador heterogêneoÓxido bi metálicoTransesterificationBiodieselHeterogeneous catalystBi-metallic oxidebachelorThesisCiências Exatas e da Terra