Banca de DEFESA: RENAN GABRIEL CONDE SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RENAN GABRIEL CONDE SANTOS
DATE: 19/10/2022
TIME: 19:00
LOCAL: Videoconferência - CAP/UFSJ
TITLE:

MATERIAL SYNTHESIS: MIXED EUCALYPTUS COAL/ALUMINA SOL-GEL CATALYST SUPPORT

KEY WORDS:

Charcoal; alumina; sol-gel; steam

PAGES: 75
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Tecnologia Química
SPECIALTY: Carvão
SUMMARY:

Charcoal has flexibility in its applications, being able to compose from components
for pigmentation of paints to, when going through an activation process, to be applied
in catalytic and adsorptive processes. Subsequently, the coal can undergo thermal
and chemical treatments, such as calcination and impregnation, to further optimize
its characteristics. A synthesis process currently studied is the sol-gel process, in
which a colloidal solution is used that rapidly precipitates forming a gel and, being
heat treated, can generate a micro or meso-porous material, increasing its specific
area. This work aimed to develop a support for a catalyst based on charcoal and
alumina, which was synthesized in the charcoal pores by the sol-gel method using
steam in the hydrolysis step. The synthesis inside the pores can be verified by a set
of analyzes such as: XRD, where it was possible to assume the presence of
structures of pseudoboehmite and γ-alumina; Thermogravimetry indicated a
reduction in mass loss for the treated coal due to the thermal stability of the alumina;
Physisorption of N2 indicated an increase in specific area (8.97%) and total pore
volume increased (9.48%) in relation to untreated coal; SEM/EDS confirmed the
presence of aluminum oxide inside the walls of the pores of the coal, as well as on its
surface, which could be observed due to the magnification of the sample and by
energy dispersive X-ray spectroscopy. Therefore, in the tests carried out, there is a
strong indication of the production of the mixed material of coal/alumina sol-gel
object of study of this work.

BANKING MEMBERS:
Interno - 1893854 - ALEXANDRE BOSCARO FRANCA
Interno - 1863340 - EDUARDO PRADO BASTON
Externo à Instituição - MATEUS DE SOUZA AMARAL - UFOP