Banca de QUALIFICAÇÃO: CAROLINA DA SILVA COSTA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : CAROLINA DA SILVA COSTA
DATA : 14/10/2019
HORA: 14:00
LOCAL: Sala de Aula do NUPEG
TÍTULO:

Development of a catalytic system for converting γ-butyrolactone into high added value products

PALAVRAS-CHAVES:

Catalytic hydrogenation, γ-butyrolactone, 1,4-butanediol, tetrahydrofuran

PÁGINAS: 73
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
SUBÁREA: Processos Industriais de Engenharia Química
RESUMO:

Since γ-butyrolactone is an important chemical building-block for the production of 1,4-butanediol (BDO) and tetrahydrofuran (THF), the present work aimed to study the catalytic hydrogenation processes of γ-butyrolactone from nanostructured bimetallic catalysts based on palladium and rhenium supported on silica (PdRe/SiO2). The PdRe/SiO2 catalysts were synthesized by the successive impregnation method and characterized by their surface (BET) and pore volume (BJH), amount of metals (ICP-IOES), reduction temperature (TPR), crystal structure (XRD) and morphology (TEM). The reactions were evaluated for the effect of temperature and pressure from a central rotational composite design, water effect (solvent) and supercritical CO2 (reaction medium). Only the square effects of temperature and pressure for BDO selectivity were statistically significant. BDO and GBL dimers were identified as reaction products and water had a great influence on their formations. The effects of CO2-SC were more significant in increasing the selectivity of THF.

MEMBROS DA BANCA:
Presidente - 1543286 - CAMILA GAMBINI PEREIRA
Externo à Instituição - FRANCISCO WENDELL BEZERRA LOPES - UnP
Externa à Instituição - MARIA CARLENISE PAIVA DE ALENCAR MOURA - UFRN