Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE: TALLES ANDRÉ FEITOSA DE CARVALHO
DATA: 30/03/2023
HORA: 09:00
LOCAL: Auditório do PPGQ/UFPI
TÍTULO: Lindgrenite as an efficient heterogeneous catalyst to obtain biodiesel
PALAVRAS-CHAVES: lindgrenite, soybean oil, methanol, transesterification, biodiesel.
PÁGINAS: 38
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Inorgânica
ESPECIALIDADE: Físico Química Inorgânica
RESUMO:

In the context of using biodiesel as a sustainable and renewable alternative of fossil fuels in order to combat global energy crisis, lindgrenite, Cu3(MoO4)2(OH)2, presents considerable potential to be used as a catalyst for obtaining biodiesel from soybean oil and methanol. Lindgrenite samples have been synthesized in laboratory using conventional coprecipitation and ultrasound-assisted coprecipitation method. Several catalytic tests were performed to reach the optimal conditions (methanol/oil molar ratio: 45/1, catalyst mass: 1%, reaction time: 4 hours, reaction temperature: 180°C) for obtaining biodiesel, with a 96% conversion efficiency in the first catalytic cycle and 85% conversion efficiency in its tenth catalytic cycle. The possibility of reusing the heterogeneous catalyst in several reaction cycles favors the production of biodiesel on a large scale. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) of the biodiesel obtained by catalytic method revealed negligible amount of leached metal ions (less than 1 ppm of Cu2+ and less than 3 ppm of Mo6+) with the catalyst obtained by ultrasound-assisted coprecipitation method. The similarity between the FTIR spectra of industrial biodiesel and that obtained in this work confirms the effectiveness of using lindgrenite as a catalyst for the transesterification reaction of soybean oil and methanol in order to prepare biodiesel. 

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Cadastrada em: 21/03/2023