Banca de DEFESA: MIRTES FERNANDA SOBRINHO DE FREITAS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MIRTES FERNANDA SOBRINHO DE FREITAS
DATE: 07/08/2023
TIME: 14:00
LOCAL: Sala de Seminários do Instituto de Química - UFBA
TITLE:

CONVERSION OF FURFURAL USING DOUBLE CATALYTIC BED OF CUY E NIY TO OBTAIN SUSTAINABLE CHEMICALS

 

KEY WORDS:

Furfural, Hydrodeoxygenation, 2-Methylfuran, Heterogeneous catalysts, Double catalytic bed.

PAGES: 105
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Inorgânica
SUMMARY:

The quest for a sustainable society has generated significant interest in research and development on the conversion of biomass into chemical products with high added value. Furfural is a reagent that can be obtained from inedible lignocellulosic biomass and its derivatives are products of interest in the biorefinery. This study was developed with the objective of investigating the conversion of furfural (FF) through the hydrodeoxygenation reaction using a double catalytic bed of CuY and NiY. The products of interest were: furfuryl alcohol, 2-methylfuran, 2-methyltetrahydrofuran and tetrahydrofurfuryl alcohol. The monometallic catalysts supported on HY zeolite were prepared by the impregnation method with 10, 20 and 30% copper and 10% nickel and were characterized by XRD, TG/DTA, SEM, ASAP, FITR, DRS-UV-Vis and TPR- H2. The catalysts were evaluated in the range of 180 to 260°C, using a fixed bed benchtop reactor, packed with a single catalyst bed or a double bed, composed of CuY and NiY catalysts, forming double beds with different configurations. The pattern of preferential activity of the CuY catalyst for activation of the C=O group of furfural was observed, while on NiY, reaction products in the C=C and C=O groups were observed. Furfural conversions close to 100% were observed over CuY and 37% over the NiY catalyst, in a single beds. High yields of up to 87% of furfuryl alcohol were obtained with the CuY catalyst at 180°C, while the use of the 20CuYQZ10NiY double bed made it possible to obtain 2-methylfuran with a yield above 80%, at 220°C, with high stability for 10 hours. Regardless of the reactor packing order, after the reaction, the double beds showed a smaller volume of coke deposits than the CuY catalyst, suggesting greater stability in relation to coking when the double bed is used.

COMMITTEE MEMBERS:
Interno - 2356272 - ARTUR JOSE SANTOS MASCARENHAS
Externo à Instituição - CESARIO FRANCISCO DAS VIRGENS
Interna - 282610 - HELOYSA MARTINS CARVALHO ANDRADE
Interna - 1299469 - LUCIANA ALMEIDA DA SILVA
Interno - 2362069 - RAILDO ALVES FIUZA JUNIOR
Externa à Instituição - TEREZA SIMONNE MASCARENHAS SANTOS - UEFS