Banca de QUALIFICAÇÃO: MANOEL BATISTA DE LIMA NETO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : MANOEL BATISTA DE LIMA NETO
DATA : 19/02/2025
HORA: 08:00
LOCAL: meet.google.com/kqr-jeef-isn
TÍTULO:

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

PALAVRAS-CHAVES:

NbOPO4/H-ZSM-5 core-shell composite, Pyrolysis, Biomass.

PÁGINAS: 51
GRANDE ÁREA: Outra
ÁREA: Ciências Ambientais
RESUMO:

Zeolite ZSM-5 has been standing out as one of the most active and selective catalysts for obtaining products with higher added value due to its high specific area, high hydrothermal and thermal stability and acidity. However, zeolites have a disadvantage, which is their uniquely microporous structure. Studies have been developed with the aim of generating secondary porosity, improving the diffusion of molecules to the active centers. Another material that has been investigated in recent years is niobium phosphate (NbOPO4), due to its properties, such as thermal stability, acid strength and water-tolerant properties. Thus, obtaining a catalyst/composite combining the properties of these two catalysts is something interesting and innovative. Therefore, the aim 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 with sodium hydroxide (NaOH) solution. The NbOPO4 material was synthesized during the formation of the core-shell structure. According to XRD, the successful synthesis of ZSM-5, as well as the other modified materials, was proven. ZSM-5 and the NbOPO4/ZSM-5 catalyst exhibited type I isotherms. In turn, the hierarchical zeolite H-ZSM-5 and the NbOPO4/H-ZSM-5 catalyst exhibited type I with type V isotherms, proving that secondary porosity was formed in the structures of the materials. According to the SEM images, it was possible to observe the possible formation of the core-shell structure in the catalysts, and new analysis techniques are needed to confirm this fact. Based on the thermogravimetry tests, it was possible to conclude that the H-ZSM-5 and NbOPO4/H-ZSM-5 catalysts presented superior catalytic activity than the other materials in the thermocatalytic cracking of Moringa Oleifera Lam oil. Providing lower temperatures in the process when compared to the thermal cracking of pure oil.

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