Banca de DEFESA: VENANCIO VITOR LIMA DA SILVA BEZERRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : VENANCIO VITOR LIMA DA SILVA BEZERRA
DATE: 17/08/2022
TIME: 08:00
LOCAL: Videoconferência
TITLE:

OBTAINING BIOCHAR FROM CATALYTIC PYROLYSIS OF LIGNOCELLULOSIC RESIDUE FROM 2G ETHANOL TIPS AND STRAWS

KEY WORDS:

Lignocellulose, Pyrolysis, Adsorption, Kinetics, Spectroscopy

PAGES: 92
BIG AREA: Engenharias
AREA: Engenharia Química
SUMMARY:

Second generation ethanol (2G ethanol) is one of the main technological innovations in the sugar and alcohol sector and also in the state of Alagoas. The use of sugarcane tips and straws to expand alcohol production is surrounded by economic and social advantages, which also encourages the research and innovation sectors. Despite the great advantages and benefits, the production of 2G Ethanol presents as problematic the generation of solid waste, which are applied to the burning for the generation of electricity of the unit. These residues have a large amount of lignin, called Lignocellulosic Residue (RLC), having an interesting chemical structure with vast industrial and economic applicability. Due to these characteristics, it was decided to evaluate the possibility of transforming these residues into adsorbent materials, with application in effluent treatment. To this end, the RLC was submitted to the process of degradation by controlled heating, in a process called pyrolysis. Aiming at higher quantitative yields related to solid phase production (called biochar), the pyrolysis technique was performed with the addition of NaOH, which acts as catalyst. Seeking to evaluate the adsorptive efficiency of biochar for effluent treatment, it was decided to study the adsorption of biochar in the removal of dyes, using Methylene Blue as a model pollutant. In this work, the viability of the solid pyrolysis product for this process was evaluated based on studies of the phenomenon of adsorption isotherm, and also on the aspects of transport rates, referring to adsorption kinetics. The pyrolytic process studies were modeled using a 3k Planning, using Temperature, NaOH Quantity and Biomass Particle Diameter as independent variables, and product yield as response variable for optimization of the biochar degradation process. The biochar that presented the best performance in the pyrolysis process were used for adsorptive studies of Kinetics, Isotherm and Adsorption Thermodynamics. The results showed that the addition of catalyst in rlc reduced the amount of degraded mass, and the biochar generated from a biomass heated to 500°C, with the addition of NaOH equivalent to 100.0% Of RLC, with a diameter of 300μm plus suiting in quantitative terms. Spectroscopic analyses proved the degradation efficiency as well as the determination of the biochar activator profile due to the amount of existing pores. In the adsorptive study, the biochar showed a higher tendency to the mathematical model of Sips and second order transport rate. Due to the results obtained, it was concluded that the generation of biochar by catalytic pyrolysis attributes to the RLC alternative applicability, in addition to its burning.

BANKING MEMBERS:
Presidente - 1314677 - CARMEM LUCIA DE PAIVA E SILVA ZANTA
Externo à Instituição - JOAN MANUEL RODRÍGUEZ DÍAZ
Interno - 1121112 - JOAO INACIO SOLETTI
Interno - 1797785 - LUCAS MEILI
Externo à Instituição - MOZART DALTRO BISPO - Tiradentes
Interno - 3182573 - RODOLFO JUNQUEIRA BRANDAO