Banca de QUALIFICAÇÃO: CASSIA CARVALHO DE ALMEIDA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : CASSIA CARVALHO DE ALMEIDA
DATA : 03/03/2017
HORA: 14:00
LOCAL: Auditório do LabTam (2º. Andar do NUPPRAR)
TÍTULO:

Catalytic materials based on Nickel and cobalt supported in SBA-15 to use in the dry reform of natural 

gas and in the steam reform of the ethanol.

PALAVRAS-CHAVES:

Catalytic Materials, Steam reform; Dry Reform; SBA-15; Production of hydrogen

 

PÁGINAS: 100
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
ESPECIALIDADE: Cerâmicos
RESUMO:

The steam reforming of ethanol (SRE) has been widely studied in the past years due to the rise of 

the demand for alternative technologies of energy generation, presenting a good relationship cost/benefit if 

compared to other technologies of hydrogen production. Besides, it has advantages from the environmental 

point of view, not contributing to the augmentation of CO2 concentration in the atmosphere, considering that 

all the CO2 produced in the hydrogen generation is, posteriorly, consumed in the harvest renovation. 

It is also important to highlight the immense potential for the ethanol production (in Brazil) from the

 saccharosis extracted from sugarcane, as well as the infrastructure already existent for the distribution 

of the fuel. The hydrogen production through SRE, although promising, shows several technology drawbacks, 

needing upgrade in other materials with catalytic properties. Inside this proposal, this work aims to obtain 

catalytic materials with potential efficiency for ethanol reforming, with high thermal stability, 

good heat transfer, and excellent mechanic resistance. Therefore, nickel and cobalt-based catalysts

 supported in SBA-15 were prepared by the moist impregnation method, and characterized before and 

after of the catalytic tests, by various techniques: Thermogravimetric Analysis (TGA),

 Fourier Transform Infrared (FTIR),  X-ray Diffraction (XRD), Temperature Programmed Reduction (TPR),

 with H2 to obtain the reduction profile of the H2 consumption, Nitrogen Adsorption, 

X-ray Diffraction in situ (XRD in situ), Scanning Electron Microscopy (SEM) with Dispersive Energy

 Spectroscopy (DES), aiming the comprehension of the involved mechanisms in the reforming reactions, 

also responsible for the carbon deposition on the catalysts. The methane reform with CO2 reaction, 

dry reform, is a well-established route, which has been optimized in the past decades. 

This reaction has been used as model-reaction and the catalysts have also been tested in this reaction. 

The prepared catalysts were adequate for the use in the dry reforming of methane, which conversion was 

superior to 80% during a 10-hour reaction, under 700C temperature.

 

MEMBROS DA BANCA:
Presidente - 349770 - DULCE MARIA DE ARAUJO MELO
Externo ao Programa - 2302898 - ELEDIR VITOR SOBRINHO
Externo ao Programa - 1979301 - RENATA MARTINS BRAGA
Externo à Instituição - TIAGO ROBERTO DA COSTA - CNPq