Banca de DEFESA: JOÃO MANUEL RÊGO SILVA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : JOÃO MANUEL RÊGO SILVA
DATE: 12/07/2022
TIME: 14:00
LOCAL: Auditorio do Nupprar
TITLE:

EVALUATION OF THE KINETICS AND THERMODYNAMICS OF THE THERMOCATALYTIC DEGRADATION OF SUNFLOWER OIL USING  Al‑MCM‑41 AND ZEOLITE H-ZSM-5


KEY WORDS:

 cracking; sunflower oil; kinetic, H-ZSM-5; Al-MCM-41


PAGES: 125
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUMMARY:
The sunflower oil pyrolysis process was evaluated by thermogravimetry coupled to a Fourier transform infrared spectrophotometer (TGA-FTIR), in the presence of microporous (H-ZSM‑5) and mesoporous (Al-MCM-41) catalysts in different proportions, to qualitatively evaluate the effect of deoxygenation. The catalysts were characterized by techniques and were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and determination of surface acidity. The kinetic parameters, viz. apparent activation energy (Ea) and pre-exponential factor (A) of the reaction were evaluated using isoconversional methods (FWO and KAS) at three heating rates (5, 10 and 20 ºC.min-1) in the conversion range between 20% and 80%. The methods present a level of confidence, as they numerically present relatively close Ea values. The apparent activation energies for 50% conversion of sunflower oil in the absence of catalysts using the FWO and, KAS methods were 262.56 and 255.35 kJ.mol-1, respectively; on the other hand, the OGMH2 mixture showed Ea values corresponding to 152.23 and 143.18 kJ.mol-1 for the same 50% conversion, respectively. The thermodynamic parameters, viz. enthalpy (ΔH), Gibbs free energy (ΔG) and entropy (ΔS) were calculated.

COMMITTEE MEMBERS:
Interna - 2140818 - AMANDA DUARTE GONDIM
Presidente - 350509 - ANTONIO SOUZA DE ARAUJO
Externa à Instituição - ARUZZA MABEL DE MORAIS ARAUJO - UFRN
Externa à Instituição - EDJANE FABIULA BURITI DA SILVA - Estácio
Externo à Instituição - JOAO PAULO DA COSTA EVANGELISTA - UnP
Notícia cadastrada em: 01/07/2022 10:22
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