Banca de DEFESA: GABRIELLA SOUSA DE MELO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : GABRIELLA SOUSA DE MELO
DATA : 26/07/2018
HORA: 14:00
LOCAL: Auditório do Química 3
TÍTULO:

PRODUCTION OF RENEWABLE HYDROCARBONS FROM THE CATALYTIC DEOXYGENATION OF MACAÚBA OIL (Acrocomia aculeata) USING THE MESOPOROUS MATERIALS AlSBA-15 E Mo / AlSBA-15

PALAVRAS-CHAVES:

Renewable hydrocarbons; AlSBA-15; Molybdenum Macaúba Pyrolysis.

PÁGINAS: 80
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Físico-Química
ESPECIALIDADE: Cinética Química e Catálise
RESUMO:

The demand for renewable energy resources has led to an increase in research for biofuels obtained from vegetable oils. In this context, vegetable oils that are not used for foodstuffs, such as macaúba oil, have shown promising. For the obtaining renewable hydrocarbons from macaúba, processes such as pyrolysis or cracking can be used, which in turn produces oxygenated compounds, leading to the search for catalysts that allow the conversion of these compounds into hydrocarbons. Thus, in the present work, the synthesis of AlSBA-15 catalyst and the subsequent impregnation with molybdenum were carried out in order to obtain renewable hydrocarbons from the catalytic deoxygenation of macaúba oil. The characterization of the catalysts was performed by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) coupled with X-ray Dispersive Energy (EDX) analysis and Spectroscopy in the Infrared Region Fourier (FTIR). The catalysts showed reflections on the X-ray diffraction characteristic of the highly ordered hexagonal P6mm structure of the mesoporous material SBA-15 demonstrating that the incorporation with metal did not damage the structure of the molecular sieve. The infrared spectrum showed bands characteristic of SBA-15 type materials, such as 1088 cm^-1, 804 cm^-1 and 467 cm^-1 bands referring to the asymmetric, symmetrical vibrational stretching and the Si-O-Si bond present in the structure of the SBA-15, respectively. Additionally, the presence of a 964 cm^-1 band associated with the stretching of the Si-OH bond of the silanols groups composing the structure of the mesoporous material was verified. The TGA-FTIR analysis of pure and esterified macauba oil was performed with and without the presence of the catalysts that brings the products obtained in the pyrolysis through the characterization by Spectroscopy in the Infrared Region by Fourier Transform and by the thermal degradation of macaúba oil , allowing a better understanding of pyrolysis results. The results obtained by TGA-FTIR of the samples with the catalysts showed bands in the range of 2400-2250 cm^-1  referring to the C = O bond of the CO₂ group, which led to the conclusion that AlSBA-15, and especially Mo / AlSBA-15 catalysts, resulted in the deoxygenation of macaúba oil with the consequent production of hydrocarbons.

MEMBROS DA BANCA:
Presidente - 2140818 - AMANDA DUARTE GONDIM
Interno - 348475 - DJALMA RIBEIRO DA SILVA
Externo à Instituição - EDJANE FABIULA BURITI DA SILVA - Estácio