Banca de DEFESA: GUILHERME MENTGES ARRUDA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : GUILHERME MENTGES ARRUDA
DATA : 29/11/2018
HORA: 13:30
LOCAL: AUDITÓRIO NUPEG
TÍTULO:

Photocatalytic Conversion of Methane into Methanol: Equipment Development and Experiments.

 

 

PALAVRAS-CHAVES:

Photocatalysis; methane; methanol.

PÁGINAS: 85
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
SUBÁREA: Operações Industriais e Equipamentos para Engenharia Química
ESPECIALIDADE: Reatores Químicos
RESUMO:

Due to increasing awareness regarding the environment, some gases
such as methane have been extensively studied in order to have their usage optimized,
aiming to reduce environmental impacts and the discovery of more noble
applications. Given this context, photocatalysis emerges as an alternative for the
conversion of methane into products with higher added value. The method of
obtaining methanol from methane has several advantages, since methanol not only
has a methane-like amount of energy, but also is easily transported and stored. This
work searches for a viable alternative for the photocatalytic production of methanol
from methane vapor reform, the development of a new system, as well as the
evaluation of its operation and conversion efficiency. The system consists of a
humidification column, an annular photocatalytic reactor, stainless steel screens
coated with titanium dioxide, zinc oxide or tungsten trioxide and a condenser. The
photocatalysts, deposited on the screens through methods that had been adapted from
the literature, were activated with the aid of UV-A and UV-C emission lamps,
arranged inside the reactor at different times. Oxides and supports were analyzed by
scanning electron microscopy (SEM), X-ray diffraction (XRD) and diffuse
reflectance spectroscopy (ERD) techniques, for evaluation of the homogeneity of the
coatings and to ensure that the photocatalysts meet the process requirements. The
photocatalytic tests were conducted at ambient pressure and temperature. As a result
of the depositions, the photocatalysts presented an excellent distribution, confirming
the adequacy of the technique used in relation to the purposes of the study. Although
the system was operational, the products of the process, analyzed by gas and liquid
chromatography, did not show any evidence of conversion under the experimental
conditions.

MEMBROS DA BANCA:
Presidente - 2929066 - ANDRE LUIS LOPES MORIYAMA
Interno - 349801 - CARLSON PEREIRA DE SOUZA
Externo à Instituição - INDIRA ARITANA FERNANDES DE MEDEIROS - UFRN
Externo à Instituição - SUYLAN LOURDES DE ARAÚJO DANTAS