Banca de QUALIFICAÇÃO: FERNANDO ERICK SANTOS DA SILVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : FERNANDO ERICK SANTOS DA SILVA
DATE: 14/07/2023
TIME: 08:30
LOCAL: Sala 310 PGTEC
TITLE:

SYNTHESIS AND CHARACTERIZATION OF WC AND Ni NANOCATALYSTS SUPPORTED ON Al₂O₃ AND MCM-41 FOR DRY REFORMING OF METHANE

KEY WORDS:

Nanocatalyst, tungsten carbide, surface area, methane reforming.

PAGES: 83
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUMMARY:

The search for new sources of renewable energy is a global concern for increasingly sustainable development. Among renewable energy sources, hydrogen (H₂) is considered an alternative to fossil fuels due to its minimal environmental impact. This study aimed to obtain nickel (Ni) and tungsten carbide (WC) catalysts supported on alumina (Al₂O₃) and MCM-41 for hydrogen (H₂) production through methane (CH₄) dry reforming. Various transition metals such as Co, Pd, Pt, Ru, Rh, Ir, and Ni can be used in the reforming reaction. Tungsten carbide exhibits similar behavior to Pt in several catalytic reactions, resulting from the modification of the tungsten's electronic structure by the addition of carbon. In this context, we were able to synthesize (Ni10%w) and (WC10%w) catalysts supported on Al₂O₃ through incipient wetness impregnation with distilled water, and (Ni10%w), (WC10%w), (Ni2%w-WC8%w), (Ni5%p-WC5%w), and (Ni8%w-WC2%w) catalysts supported on MCM-41 through incipient wetness impregnation with ethanol. The WC used in the study was produced by carbothermal reduction of ammonium paratungstate (APT). The obtained material was characterized by X-ray diffraction (XRD), X-ray fluorescence, Raman spectroscopy, nitrogen adsorption-desorption using the BET method, and scanning electron microscopy (SEM). Based on the results obtained, it was possible to conclude that the WC production process was satisfactory, yielding nanoscale powders with irregular particle shapes and sizes, and good dispersion of the nickel phase on the alumina and MCM-41 supports. The (Ni10%w/Al₂O₃) catalyst exhibited a specific surface area of 3.60 m²/g, and the (WC10%w/Al₂O₃) catalyst exhibited a specific surface area of 2.2 m²/g.

COMMITTEE MEMBERS:
Presidente - 2266607 - FABIO JOSE PINHEIRO SOUSA
Interno - 1350249 - RUBENS MARIBONDO DO NASCIMENTO
Externo ao Programa - 345842 - UILAME UMBELINO GOMES - UFRNExterna à Instituição - MARIA JOSÉ SANTOS LIMA - UFRN