Banca de QUALIFICAÇÃO: THALITA MEDEIROS BARROS

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : THALITA MEDEIROS BARROS
DATE: 17/12/2024
TIME: 09:00
LOCAL: Auditório do NUPPRAR
TITLE:

Selective electrochemical degradation of biomass into vanillic acid

KEY WORDS:

Cork, oxidants, electroconversion, biomass, persulfate

PAGES: 37
BIG AREA: Engenharias
AREA: Engenharia Química
SUMMARY:

The process for obtaining high-value-added phenolic compounds from natural materials has been discussed in academic and industrial circles. Biopolymers, such as lignin, are materials that can undergo depolymerization to obtain smaller organic fractions. However, this type of method requires a prior process to obtain the lignocellulosic fraction. This study proposes a methodological route for directly obtaining high-value-added phenolic compounds from cork biomass. In this sense, the study aims to evaluate different parameters and optimize them to promote the extraction of the phenolic compounds of interest. To this end, different green electrogenerated oxidizing agents will be studied, as well as their different proportions in the reaction medium, given that the presence of this substance tends to imply the catalytic cleavage of molecules that make up the cork biomass. Which can generate the desired phenolic products, such as: vanillic acid, vanillin, syringic acid, p-coumaric acid and transfeluric acid. Together, variables such as: temperature used in the system and reaction time, will also be studied to understand the extraction process of these organic compounds. In addition, the qualification and quantification methodology of these phenolic compounds will be carried out through High Performance Liquid Chromatography (HPLC), in order to analytically validate the quantity and which phenolic compounds are generated through cork biomass. In addition, the aim is to develop a green electrochemical sensor capable of detecting and quantifying different organic compounds via electroanalysis, in order to have a fast, low-cost analysis life and low detection and quantification limits. It is in this sense that the study aims to promote the concept of circular economy and connect different industrial segments in a sustainable way.

COMMITTEE MEMBERS:
Presidente - 2275848 - ELISAMA VIEIRA DOS SANTOS
Interna - ***.673.134-** - JUSSARA CÂMARA CARDOZO - UFRN
Externo ao Programa - 1645110 - CARLOS ALBERTO MARTINEZ HUITLE - UFRN