Banca de DEFESA: ARTHUR LIMA MACHADO DE SANTANA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ARTHUR LIMA MACHADO DE SANTANA
DATE: 15/12/2023
TIME: 14:00
LOCAL: https://conferenciaweb.rnp.br/sala/carlos-augusto-de-moraes-pires
TITLE:

Bio-oil Recovery from sisal residue in a fixed bed system.

KEY WORDS:

Fast pyrolysis, sisal residue, bio-oil recovery, fixed bed.

PAGES: 71
BIG AREA: Engenharias
AREA: Engenharia Química
SUMMARY:

Several schemes for recovery systems for bio-oil from fast pyrolysis are found in the literature, most of which involve heat exchangers and/or electrostatic precipitators. However, some bio-oils have a high fouling rate, making their collection difficult using conventional methods. This is the case of bio-oil from solid sisal residue, which has one of the highest viscosities and pour points ever studied. This work evaluates a new process for recovering bio-oil from solid sisal residue based on a series of fixed beds coupled to shell and tube heat exchangers. The new recovery system minimized fouling by reducing sharp curves and connections, which were mainly responsible for this event. This system has two heat exchangers, followed by five vessels in series, which contain the beds and are accompanied by two more heat exchangers. The first type of experiment was carried out with beds of glass spheres, whose bio-oil was recovered in the bed by flowing the previously heated fluid. The second type of experiment was conducted in beds of water, whose accumulated bio-oil was taken to the outside of the plant along with the liquid. A series of operations were carried out in a fast pyrolysis pilot plant based on central composite factorial planning, seeking to verify the efficiency of the systems at different temperatures and biomass flow rates. Furthermore, FTIR, GC-MS, and NMR analyses were carried out on the bio-oil and water samples obtained to study the chemical separation capacity of each of the systems. This work showed that the recovery method based on fixed beds of glass spheres received the best bio-oil yield (15.08% at 550 oC and 1.556 kg/h) without presenting any operational instabilities due to encrustations in the system. On the other hand, there were no significant chemical differences in the composition of the bio-oil samples between the beds. With the water bed, the yield was low (6.8%), and despite recovering hydrophilic species in the aqueous phase, it generated a significant amount of liquid effluents. The recovery method using sphere beds proved to be promising, especially in terms of efficiency, drastic reduction in scale, and absence of liquid effluents, compared to the water column system.

COMMITTEE MEMBERS:
Presidente - 2246900 - CARLOS AUGUSTO DE MORAES PIRES
Externo à Instituição - ROBERTO BATISTA DA SILVA JUNIOR
Interna - 1817608 - ROSANGELA REGIA LIMA VIDAL
Externa à Instituição - SIRLENE BARBOSA LIMA - UFBA