Banca de DEFESA: MARCELA CRISTINA PEREIRA DOS SANTOS ALMEIDA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MARCELA CRISTINA PEREIRA DOS SANTOS ALMEIDA
DATE: 24/02/2022
TIME: 14:00
LOCAL: Remota
TITLE:

Energy valorization of suppressed species in the implementation of a wind energy project

KEY WORDS:

Plant suppression, caatinga, fast pyrolysis, biomass valorization

PAGES: 60
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Energia de Biomassa Florestal
SUMMARY:

The need to diversify the Brazilian energy matrix, due to water scarcity and the need for low carbon energy sources, has awakened research in the search for renewable alternatives for energy generation. In view of the growing wind potential, mainly in the Northeast region and in the state of Rio Grande do Norte, there is a considerable growth of plant suppression, due to the installation of wind farms. The present work seeks to present alternatives for energy recovery of the species suppressed during the installation of a wind farm in the region of Mato Grande, through energy characterization and analytical rapid pyrolysis. The data that supported the work were provided by an environmental consulting company from the state of Rio Grande do Sul, and for the energetic characterization of the residues produced during the suppression of native species of the caatinga, immediate analysis, calorific value, apparent density, thermogravimetric analysis and cellulose composition were carried out, hemicellulose and lignin. Analytical fast pyrolysis was developed at 500 °C in a CDS Analytical HP-R 5200 pyrolyser coupled to a gas chromatograph to identify the pyrolysis products. The calorific value of pear, imburana and catingueira were 18.39 MJ/kg-1, 17.99 MJ/kg-1 and 17.47 MJ/kg-1, respectively, depending on their energy potential. The pyrolysis results show the presence of several oxygenated compounds characteristic of the decomposition of lignocellulosic materials, such as phenols, ketones and light oxygenated compounds, containing between 1-4 carbon atoms, which comprise carboxylic acids. The materials have a high calorific value and can be applied for direct combustion, such as in the manufacture of briquettes and pellets. While the pyrolysis results reveal the potential for obtaining renewable chemicals as an attractive product for several areas of industry, the paint, phenolic resin and pesticide industries. And because it has a considerable amount of oxygenated compounds in its composition, as is the case of the classes of ketones and phenols, it reveals its potential for the use of pyrolysis products in the chemical industry, as well as the direct application of these biomasses in thermochemical processes of conversion of energy.

BANKING MEMBERS:
Presidente - 1979301 - RENATA MARTINS BRAGA
Interno - 1079298 - ALEXANDRE SANTOS PIMENTA
Externo à Instituição - JANDUIR EGITO DA SILVA - IFRN