Banca de QUALIFICAÇÃO: MANUELA SILVA MARTINS DE OLIVEIRA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : MANUELA SILVA MARTINS DE OLIVEIRA
DATE: 05/08/2022
TIME: 09:00
LOCAL: videoconferência
TITLE:

Hierarchically Structured Zeolites: A Study of Mesoporosity Insertion Via Mechanochemistry.

KEY WORDS:

Zeolites, Mordenite, Faujasite, Mesoporosity, Cracking.

PAGES: 80
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Inorgânica
SPECIALTY: Físico Química Inorgânica
SUMMARY:

The insertion of mesoporosity via mechanochemistry through the use of a ball mill and the influence of channel dimensionality in zeolitic structures with 12-member pores (12-MR) and 1D (1-dimensional) channel system for Mordenite zeolite and 3D (3 dimensions) for the Faujasite zeolite were evaluated in this work. The materials synthesized and modified by means of milling and cation exchange processes were characterized using several complementary techniques, such as: X-Ray Diffraction, X- Ray Fluorescence, Nitrogen Adsorption and Desorption, Scanning and Resonance Electron Microscopy Aluminum Nuclear Magnetics. The mordenite zeolite showed a considerable increase in the volume of mesopores when subjected to lower rotations and longer rotation times. Faujasite zeolite showed little structural stability against cation exchange treatments due to the low Si/Al ratio presented by this material. The materials synthesized and modified in this work will be further tested in the model reaction of Cumene cracking.

COMMITTEE MEMBERS:
Externo à Instituição - FABIO GARCIA PENHA - IFRN
Externa ao Programa - ***.566.270-** - LINDIANE BIESEKI - UFRN
Presidente - 1308577 - SIBELE BERENICE CASTELLA PERGHER
Interno - 2087667 - TIAGO PINHEIRO BRAGA