Banca de DEFESA: GABRIELLE MATHIAS REIS

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : GABRIELLE MATHIAS REIS
Date: 30/03/2026
TIME: 09:00
LOCAL: https://conferenciaweb.rnp.br/webconf/wagner-27
TITLE:

Valorization of terpenes through catalytic isomerization using sulfonated carbon as a sustainable catalyst

PAGES: 162
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Físico-Química
SPECIALTY: Cinética Química e Catálise
SUMMARY:

In this work, sulfonated carbons were prepared from renewable precursors through carbonization and sulfonation steps, resulting in materials containing different surface acidic groups, such as sulfonic, carboxylic, lactonic, and phenolic groups. Initially, the catalysts were characterized using appropriate physicochemical techniques to determine their total acidity and textural properties. Subsequently, these materials were applied to the isomerization of limonene, which was employed as a model reaction for the preliminary evaluation of the catalytic performance of the sulfonated carbons. Based on these results, the reaction conditions for limonene conversion were optimized, allowing a systematic investigation of the influence of operational variables on the activity and selectivity of the system. Subsequently, the isomerization of α-pinene oxide was used as a more complex reaction, aiming to deepen the understanding of the role of nature and strength of the acid sites, as well as the carbocation intermediates involved in the reaction mechanism. Additionally, experimental design and multivariate analysis tools were employed to correlate the physicochemical properties of the catalysts with their catalytic performance. Overall, the results demonstrate that sulfonated carbons constitute efficient, versatile, and promising systems for the catalytic valorization of terpenes from renewable sources.

COMMITTEE MEMBERS:
Presidente - Interno ao Programa - 1601156 - WAGNER ALVES CARVALHO
Membro Titular - Examinador(a) Interno ao Programa - 2351974 - JULIANA DOS SANTOS DE SOUZA SILVA
Membro Titular - Examinador(a) Externo à Instituição - RAPHAEL RODRIGUES - UFGD
Membro Titular - Examinador(a) Externo à Instituição - TIAGO DANIEL PEREIRA ADRIANO FERNANDES - UAL
Membro Titular - Examinador(a) Externo à Instituição - MARINA KIRILLOVA
Membro Suplente - Examinador(a) Interno ao Programa - ***.691.308-** - YVAN JESUS OLORTIGA ASENCIOS - USP
Membro Suplente - Examinador(a) Externo à Instituição - THIAGO DE MELO LIMA - UFF
Membro Suplente - Examinador(a) Externo à Instituição - FÁBIO GODOY DELOLO - UFMG