Banca de DEFESA: ISABELLE MARIANE DE LIMA FERREIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ISABELLE MARIANE DE LIMA FERREIRA
DATA : 27/07/2018
HORA: 09:00
LOCAL: Auditório do química 3
TÍTULO:

CATALYTIC PYROLYSIS OF MICROALGAE BIOMASS TO OBTAIN RENEWABLE FUELS USING MESOPOROUS MATERIALS WITH NICKEL AND MOLYBDENUM

PALAVRAS-CHAVES:

Microalgae, Biofuels, Pyrolysis, AlSBA-15.

PÁGINAS: 90
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Físico-Química
ESPECIALIDADE: Cinética Química e Catálise
RESUMO:

The 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 fuels. The catalysts were synthesized and characterized by XRD, FTIR, TGA / DTGA thermal analysis and SEM with EDS. The microalgae biomass was characterized by elemental analysis (CHN) and TGA. The catalysts presented reflections on X-ray diffractograms, characteristic of the highly ordered P6mm hexagonal structure of the SBA-15, demonstrating that the incorporation of the metals did not modify the structure of the molecular sieve. The spectrum of the catalyst showed bands in the regions of 1050 and 800 cm -1, related to the symmetrical and asymmetric elongation of the O-Si-O bonds and, at 950 and 460 cm -1, attributed to the Si-OH bond elongation and the deformations Si-O-Si, common in silicate materials. And, the mapping via EDS evidenced the presence of nickel and molybdenum metals in the structure of AlSBA-15. The thermogravimetric analysis of Fourier transform infrared (TG-FTIR) was performed to show a prediction of the gaseous products obtained by the temperature range. Thus, it was found 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 molecules. Where the best results with very high 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.

MEMBROS DA BANCA:
Presidente - 2140818 - AMANDA DUARTE GONDIM
Externo à Instituição - LUZIA PATRICIA FERNANDES DE CARVALHO GALVAO - UnP
Interno - 1308577 - SIBELE BERENICE CASTELLA PERGHER
Externo à Instituição - VINÍCIUS PATRÍCIO DA SILVA CALDEIRA - UERN