Banca de QUALIFICAÇÃO: EVELLYN PATRICIA SANTOS DA SILVA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : EVELLYN PATRICIA SANTOS DA SILVA
DATE: 31/08/2023
TIME: 13:30
LOCAL: PLATAFORMA RNP
TITLE:

CATALYSIS IN BIORREFINING ROUTES: STUDY OF THE REACTION OF LEVULINIC ACID WITH GLYCEROL IN THE PRESENCE OF Sn(IV)-BASED CATALYZERS

KEY WORDS:

catalysis; organotins (IV); polyol; acylglycerols

PAGES: 50
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUMMARY:

The use of fossil sources is associated with environmental, economic and geopolitical impacts, and questions are being raised about their finiteness. Currently, several public policies to encourage and subsidize the use of chemical inputs and fuels from renewable sources, such as biomass, have been discussed and applied worldwide, of which we can highlight the development of biorefineries focused on the production of esters from the reaction between glycerol and levulinic acid, in which both are derived from lignocellulosic biomass. As a way to meet the high energy demands and the synthesis of new products, these esters have emerged as promising biopolymers and fuel additives. Therefore, in this work, Sn(IV)-based catalytic systems were employed to esterify levulinic acid with the alcoholysis agent (glycerol), in which aiming at a green process, no organic solvents were used during the reactions. The catalytic efficiency in terms of conversion and yield were evaluated and the reactions were conducted with the variation of reaction parameters, always in comparison with the reactions in the absence of the catalysts. The reactions were monitored by gas chromatography coupled with flame ionization detector (GC-FID) and the products obtained were identified by GC coupled with mass spectrometry.

BANKING MEMBERS:
Externo(a) à Instituição - ANTONIO OSIMAR SOUSA DA SILVA
Interno(a) - 1869296 - CINTYA D'ANGELES DO ESPIRITO SANTO BARBOSA
Interno(a) - 1904678 - JANAINA HEBERLE BORTOLUZZI
Presidente - 1515173 - SIMONI MARGARETI PLENTZ MENEGHETTI
Externo(a) ao Programa - 3298566 - THATIANE VERISSIMO DOS SANTOS MARTINS
Interno(a) - 1697766 - WANDER GUSTAVO BOTERO