Banca de DEFESA: JOHNATHAN HERBERT FREIRE DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JOHNATHAN HERBERT FREIRE DA SILVA
DATE: 29/11/2024
TIME: 09:00
LOCAL: Auditório do LABPROBIO
TITLE:

ELECTROCHEMICAL DECARBOXYLATION OF FATTY ACIDS FROM SAFFLOWER OIL FOR PRODUCTION OF RENEWABLE HYDROCARBONS

KEY WORDS:

Biofuels. Electrosynthesis. Electrodecarboxylation. Fatty acids. Safflower

PAGES: 69
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Orgânica
SPECIALTY: Síntese Orgânica
SUMMARY:

Currently, a large part of the world's energy matrix comes from fossil fuels such as oil, coal and natural gas. However, as these are non-renewable raw materials, the latent scarcity of these sources, together with the increase in greenhouse gas emissions from the burning of these fuels, makes the search for alternative energy sources extremely important for global environmental and economic sustainability. Among the possible energy sources, safflower oil has shown promising properties for the production of biofuels. In general, the use of this raw material as a biofuel requires an oil deoxygenation step that can be obtained through catalytic pyrolysis techniques. Despite being widely used, catalytic pyrolysis has some technical disadvantages, such as prior preparation of the catalyst, high temperatures, high pressure and specific reactors. In this context, the search for new methods of deoxygenation of safflower oil is extremely important for the viability of this material as a biofuel. This work presents a new strategy for the decarboxylation of the respective fatty acids from the hydrolysis of safflower oil, using the electrochemical technique. The reactions were performed on the bench and the obtained products were analyzed by gas chromatography coupled with mass spectrometry (GC/MS). Dispensing with the use of metal catalysts or redox reagents, the electrochemical system allowed the conversion of fatty acids, with 100% conversion and 80% yield, into mixtures composed mainly of C6-C18 hydrocarbons and C6-C19 alcohols, using graphite electrodes as cathode and anode, under mild temperature and pressure conditions (25º C and 1 atm). The system demonstrated high potential to act as a complementary synthesis route in conjunction with thermocatalytic processes to obtain hydrocarbons and alcohols from renewable sources.

COMMITTEE MEMBERS:
Presidente - 1645110 - CARLOS ALBERTO MARTINEZ HUITLE
Interna - 2140818 - AMANDA DUARTE GONDIM
Interno - 2087667 - TIAGO PINHEIRO BRAGA
Externa ao Programa - 2140775 - LIVIA NUNES CAVALCANTI - UFRNExterno à Instituição - JOSÉ EUDES LIMA SANTOS - UFRN