Banca de DEFESA: GABRIELA MAGALHÃES MAIA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : GABRIELA MAGALHÃES MAIA
DATE: 15/07/2022
TIME: 14:00
LOCAL: Auditório do campus VI
TITLE:

SYNTHESIS OF TITANIUM DOPED METALLORGAN NETWORKS FOR OXIDATIVE DESULFURIZATION OF FOSSIL FUELS

KEY WORDS:

Catalyst; ODS; UiO-66; Titanium.

PAGES: 64
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Inorgânica
SUMMARY:

The invention of gasoline and diesel engines and the technological advance for drilling wells intensified the exploration and use of oil. The combustion of petroleum releases sulfur compounds into the environment, which are harmful to humans, as well as from an economic and environmental point of view. In this context, oxidative desulfurization (ODS) emerges as an innovative technology for the production of diesel with low sulfur contents, under milder conditions than those necessary for the process known as hydrodesulfurization (HDS), commonly used in refining processes. The ODS reaction requires the presence of an oxidizing agent and a catalyst. Heterogeneous catalysts are very promising in this regard. Metal-organic frameworks (MOFs) are solid crystalline materials with high porosity formed by a strong bond between metal ion and organic ligand. MOF UiO-66, a metal-organic framework based on zirconium and terephthalic acid, is an interesting material for application in ODS processes. Thus, the general objective of this work is to synthesize pure and doped UiO-66 MOFs with different titanium contents, aiming at the oxidative desulfurization of a simulated petroleum matrix, using hydrogen peroxide as an oxidizing agent and diobenzothiophene (DBT) as a sulfur compound. The synthesis, characterization and application of these materials was the object of study, and since they proved to be very promising as catalysts, they were chosen for testing in ODS reactions within the scope of this work. Through the characterization techniques of X-Ray Diffraction (XRD), Infrared Spectroscopy (FT-IR), Thermogravimetric Analysis (TG), X-Ray Fluorescence (FRX), Multimolecular Adsorption Theory (B.E.T.), Electron Microscopy of Scanning (SEM) and Energy Scattering X-Ray Spectroscopy (EDS) it was possible to observe the effectiveness of the proposed synthesis method and evaluate the properties of the synthesized materials. The results of the ODS assays varying the reaction parameters were obtained by analysis in GC-FID. For the standard reaction condition (50 mg of catalyst, 60 °C, O/S ratio=15), after 120 min of reaction, up to 96% of the DBT content was removed for 10TiMOF and the material could be reused. in 4 cycles without significant loss of activity.

BANKING MEMBERS:
Presidente - EUDES LORENCON
Interno - PATTERSON PATRICIO DE SOUZA
Interno - EMERSON FERNANDES PEDROSO
Externa ao Programa - DIANA QUINTAO LIMA