Gondim, Amanda DuarteFerreira, Isabelle Mariane de Lima2018-12-062018-12-062018-07-24FERREIRA, Isabelle Mariane de Lima. Estudo da pirólise catalítica da biomassa de microalga para obtenção de biocombustíveis renováveis utilizando materiais mesoporosos com níquel e molibdênio. 2018. 77f. Dissertação (Mestrado em Química) - Centro de Ciências Exatas e da Terra, Universidade Federal do Rio Grande do Norte, Natal, 2018.https://repositorio.ufrn.br/jspui/handle/123456789/26253The use of microalgae has been prominent in the context of sustainable innovation in order to use them for the production of biofuels, due to its great biomass production capacity and its cultivation developed in adverse conditions, such as in wastewater. Therefore, the synthesis and characterization of the mesoporous material AlSBA-15, with the incorporation of nickel and molybdenum metals, was studied in order to optimize the pyrolysis products of the microalgae biomass for the generation of renewable biofuels. The catalysts were synthesized and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermal analysis (TGA/DTG), scanning electron microscopy (SEM) and dispersive energy spectroscopy EDS). The microalgae biomass was subjected to an acetylation reaction to facilitate the fiber opening and analyzed by TGA/DTG and Fourier transform infrared coupled thermogravimetric analysis (TG-FTIR). The catalysts presented reflections on X-ray diffractograms, characteristic of the hexagonal P6mm structure of the SBA-15, demonstrating that the incorporation of the metals did not modify the structure of the molecular sieve. In addition, the high-angle diffractograms present diffraction peaks that demonstrate the presence of the metals in the material. In addition, the mapping via EDS evidenced the presence of nickel and molybdenum metals in AlSBA-15. TG-FTIR from the acetylated biomass sample showed a greater variety of gaseous products than non-acetylated biomass, confirming that the acetylation reaction favors the decomposition of the biomass. Also, it was verified that from 300 °C appeared bands with vibration peaks centered between 2400 and 2250 cm-1 attributed to the stretching vibrations of the functional group C=O, referring to CO2 elimination. Where the best results with very high absorption bands were obtained when the microalgae biomass sample was in the presence of the catalysts with nickel and molybdenum metals, an indicative of deoxygenation by decarboxylation, which reflects an improvement of the fuel produced.Acesso AbertoBiocombustíveisMicroalgaAlSBA-15AcetilaçãoDesoxigenaçãomasterThesisCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA