Banca de DEFESA: LUIS GABRIEL GOMES PEREIRA
Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.STUDENT : LUIS GABRIEL GOMES PEREIRA
DATE: 15/09/2023
TIME: 14:00
LOCAL: https://conferenciaweb.rnp.br/sala/carlos-augusto-de-moraes-pires
TITLE:
BIO-OIL UPGRADE FROM SISAL RESIDUE
KEY WORDS:
bio-oil, sisal residue, fast pyrolysis, fluidized bed, catalytic transformation, O/C ratio, phenolic, aromatic.
PAGES: 112
BIG AREA: Engenharias
AREA: Engenharia Química
SUMMARY:
The sisal residue bio-oil, produced by the fast pyrolysis process in a fluidized bed, presented unusual viscosity and flow characteristics in relation to the typical bio-oils found in the literature. The characterization performed in the bio-oil showed that it has a differentiated composition, which stands out due to the low O/C ratio and the high phenolic content, which varied according to the process operating conditions. The present work has the objective of evaluating the reduction of oxygen species in the sisal residue bio-oil from the influence of the operational variables of the fast pyrolysis process and its catalytic transformation by Cu-Al/MCM-41 type catalysts. The bio-oils were produced from N2 (8-9 Nm³/h), reaction temperature (450-500 ºC), biomass injection flow rate (610-1000 g/h) and (50-1700 mmH2O). The bio-oil that provided the lowest oxygen-to-carbon ratio (O/C) elements, besides having the highest content of aromatics, was obtained with N2 flow rate of 8 Nm³/h, temperature of 450 °C, biomass flow rate of 1000 g/h and system pressure of 50 mmH2O. The bio-oil with the highest phenolic content (14,2 wt%), in turn, was obtained with the lowest N2 flow rate of 8 Nm³/h, biomass flow rate of 610 g/h and reaction temperature of 500 ºC. In this last operating condition, a product with a lower average molecular weight (~ 362 g/mol) was obtained, which indicated the favoring of the depolymerization of the bio-oil. In general, the oxygen contents obtained were much lower than those reported for pyrolysis oils; while the sisal residue bio-oil obtained an O/C ratio of 0,13, without catalyst, the other oils obtained 1,5 on average. These preliminary results showed that the sisal residue bio-oil presents a composition with high contents of phenolic compounds. It has, therefore, great potential for obtaining biofuels and/or aromatics and phenols of high added value through catalytic modification, due to the low oxygen content and high degree of depolymerization.
COMMITTEE MEMBERS:
Presidente - 2246900 - CARLOS AUGUSTO DE MORAES PIRES
Interna - ***.575.865-** - MARIA DO CARMO RANGEL SANTOS VARELA - UFBA
Interna - ***.919.627-** - LEILA MARIA AGUILERA CAMPOS - UFBA
Externa ao Programa - ***.621.895-** - SIRLENE BARBOSA LIMA - UFBA
Externo à Instituição - ROBERTO BATISTA DA SILVA JUNIOR
Externo à Instituição - JORGE OTÁVIO TRIERWEILER