Banca de DEFESA: MANOEL BATISTA DE LIMA NETO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : MANOEL BATISTA DE LIMA NETO
DATA : 28/03/2025
HORA: 08:00
LOCAL: Sala 1 – Matemática e Biologia – FANAT/UERN
TÍTULO:

DEVELOPMENT OF NbOPO4/HZSM-5 CORE-SHELL CATALYST FOR CATALYTIC CRACKING OF MORINGA OLEIFERA LAM OIL

PALAVRAS-CHAVES:

Composite; Niobium phosphate; Zeolite; Catalytic test; Biomass.

PÁGINAS: 66
GRANDE ÁREA: Outra
ÁREA: Ciências Ambientais
RESUMO:

Zeolite ZSM-5 has been standing out as one of the most widely used catalysts for use in various types of reactions, in order to obtain products with higher added value due to its high specific area, high hydrothermal and thermal stability, and acidity. However, zeolites have limitations in their structures, such as small pore size. The hierarchy in these structures has been used to generate secondary porosity, facilitating the diffusion of molecules to the active centers. Another material that has been investigated is niobium phosphate (NbOPO4), characterized by its high thermal stability and acid strength. Therefore, the objective of this work was to develop micro and mesoporous catalysts with core-shell structure using the hierarchical zeolite H-ZSM-5 as core and NbOPO4 as shell, and applying them in the thermocatalytic cracking of Moringa Oleifera Lam oil. The ZSM-5 zeolite was synthesized by the hydrothermal method and hierarchized by alkaline treatment. According to the structural characterizations (XRD), textural and morphological analysis (SEM), it was possible to prove the formation of the materials and the generation of secondary porosity in the catalysts. In addition, there is an indication of the formation of a core-shell structure in the modified materials, being necessary to perform new characterization techniques for the proof. Based on the thermogravimetry tests, it was possible to observe that the catalysts H-ZSM-5 and NbOPO4/H-ZSM-5 presented superior catalytic activity to the materials, ZSM-5, NbOPO4, and NbOPO4/ZSM-5 in the thermocatalytic cracking of Moringa Oleifera Lam. oil, providing lower temperatures in the process when compared to the thermal cracking of the oil. Using the kinetic modeling of OFW and KAS, it was possible to calculate the activation energy of the materials, presenting better performances for the catalysts H-ZSM-5 and NbOPO4/H-ZSM-5. However, it is possible to conclude that all the materials were successfully synthesized and present good performance in the cracking of Moringa oil, and may still be promising when applied in other chemical reactions.

MEMBROS DA BANCA:
Externa à Instituição - ADRIANA PAULA BATISTA DOS SANTOS - UERN
Presidente - 7961 - ANNE GABRIELLA DIAS SANTOS CALDEIRA
Externo à Instituição - MÁRCIO CLEIVO DE MORAIS SOUZA