Banca de QUALIFICAÇÃO: JONATHAN NASPER BENTO DA SILVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : JONATHAN NASPER BENTO DA SILVA
DATE: 26/08/2022
TIME: 14:00
LOCAL: AUDITORIO DO NUPEG
TITLE:

PRODUCTION OF BIODIESEL BY SUPERCRITICAL TRANSESTERIFICATION OF SESAME OIL IN A CONTINUOUS-FLOW REACTOR

KEY WORDS:

Biodiesel; Sesame oil; Transesterification; Continuous reaction; Supercritical conditions.

PAGES: 60
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Tecnologia Química
SPECIALTY: Petróleo e Petroquímica
SUMMARY:

In view of the environmental conditions in the world today, the demand for renewable energy sources has increased more and more due to the need to reduce the pollution generated to the environment when using fossil fuels. Biodiesel stands out as one of these new energy sources due to its great variety in the raw materials that can be used in its production and also because of its biodegradability. The sesame seed presents in its composition a high oil content and its cultivation is favorable due to its ability to adapt to regions with a dry climate. Initially used in the food industry, the oleaginous seed shows potential as a natural source for biodiesel production, and this process has received substantial incentive through tax benefits on the purchase of biofuel from this plant. The transesterification reaction of sesame oil under supercritical conditions appears as an alternative to the most common method of biodiesel production, the catalytic transesterification, because there is no need to use a catalyst in the reaction, resulting in a simplification and possible savings in the process. The proposal of this work consisted in the use of sesame oil and ethyl alcohol as reactants in the biodiesel production process under the operational conditions of supercritical fluids. A continuous flow reactor of 15 mL volume was used in the experiments, the system pressure was kept at 100 bars, varying the reaction temperature in the range of 310-390 °C, with a residence time of 15-45 minutes and a molar ratio oil:ethanol of 1:30-1:50. The physical-chemical properties of sesame oil were also analyzed, obtaining the values for its density, acidity index, free fatty acids content, viscosity and humidity. Finally, statistical analysis of the experimental data was performed based on the variation of the operational parameters and the yield of the biodiesel formed. The oil properties analyzed indicated the viability of its use for biofuel production. The best result obtained was 87.45 % at a temperature of 390 °C, residence time of 45 minutes and oil:ethanol molar ratio of 1:40. Statistical analysis revealed a greater influence of temperature and residence time on the results.

COMMITTEE MEMBERS:
Externo à Instituição - ANDRE EZEQUIEL GOMES DO NASCIMENTO
Presidente - 1670497 - HUMBERTO NEVES MAIA DE OLIVEIRA
Externo à Instituição - SAULO HENRIQUE GOMES DE AZEVÊDO - IFRN