Banca de QUALIFICAÇÃO: THIAGO WINICIO ROCHA LIMA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : THIAGO WINICIO ROCHA LIMA
DATE: 14/03/2025
TIME: 08:00
LOCAL: PGTEC
TITLE:

MODIFIED PHASE INVERSION APPLIED TO THE PRODUCTION OF Ce2(WO4)3 HELICAL TUBULAR MEMBRANE IN 3D PRINTED MOLD

 

KEY WORDS:

Helical tubular dead-end membrane, phase inversion, 3D printed mold, cerium tungstate.

PAGES: 80
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Operações Industriais e Equipamentos para Engenharia Química
SPECIALTY: Operações de Separação e Mistura
SUMMARY:

Climate change, caused by the emission of greenhouse gases (GHG), is already affecting several regions of the planet, manifesting itself in extreme events. Methane gas (CH4) stands out due to its high warming potential in the short term, which requires research and investment in removal technologies directly at the sources of emissions. There are studies on the development of catalytic ceramic membrane reactors (e.g. perovskites, tunstates) for converting methane into products such as synthesis gas (CO+H2), an input in other production and energy chains. Although there is progress, in order to develop membranes with innovative conformations, further research is needed, as the geometry of the membrane plays a crucial role in the efficiency of processes involving gas separation. This work proposed the production and characterization of a dense and helical tubular-shaped ceramic membrane made of cerium tungstate (Ce2(WO4)3). It was synthesized through the combined EDTA-Citrate complexation method, sol-gel type. The tungsten precursor (WO3) and the Ce₂(WO₄)₃ ceramic powder synthesized were characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques, which confirmed the desired phase. The PES polymer showed better performance during solubility and casting, conforming the desired geometry to the green tube. Success in sintering/densification with good mechanical strength is expected. Furthermore, the helical membrane tube will be subjected to the bending test to measure the mechanical strength, to the BET technique to determine the specific surface area, and to the FEG SEM with coupled EDS. Selective oxygen permeability and methane conversion tests in a membrane reactor are suggested for the following works.

COMMITTEE MEMBERS:
Presidente - 349801 - CARLSON PEREIRA DE SOUZA
Interna - 1271737 - CAMILA PACELLY BRANDÃO DE ARAÚJO
Interno - 1149554 - OSVALDO CHIAVONE FILHO
Externo ao Programa - 1474380 - MARCIO ASSOLIN CORREA - UFRN