Banca de QUALIFICAÇÃO: CAMILA GISELE DAMASCENO PEIXOTO MORAIS

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : CAMILA GISELE DAMASCENO PEIXOTO MORAIS
DATA : 30/08/2019
HORA: 09:00
LOCAL: Laboratório de Combustíveis e Lubrificantes da UFRN
TÍTULO:

Processing of atmospheric petroleum residue by catalytic distillation

PALAVRAS-CHAVES:

Atmospheric petroleum residue, catalytic distillation, zeolite, mesoporous material and diesel

PÁGINAS: 100
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
RESUMO:

Oil refining comprises a series of physical and chemical operations whose function is to separate their various fractions and process them, generating products of great use to society. One of the steps of refining is atmospheric distillation, when a bottom product called atmospheric residue (ATR) is formed, which consists of a high molecular weight fraction composed of saturated, aromatic, resins and asphaltenes. Recovery of this waste is important as there is an increase in world demand for oil. This points to the need for the development of new processing technologies, including waste. Catalytic distillation is a method that combines component separation with reactivity process to obtain lighter derivatives such as gasoline and diesel. In this work, ATR was distilled under atmospheric pressure in its pure form (conventional) and also with the addition of zeolite HY and mesoporous material MCM-41 (catalytic). The effectiveness of beneficiation was investigated by thermogravimetric analysis and gas chromatography. In order to characterize ATR, physicochemical and rheological parameters were determined. The products obtained by conventional and catalytic distillation, here called distillates, were evaluated by non-isothermal thermogravimetry and their composition estimated by high temperature gas chromatography. The results showed that the residue used can be classified as heavy and high pour point oil. The rheological parameters indicate that ATR viscosity increases with decreasing temperature, however, the increase in shear rate decreases this characteristic. Regarding the distillation curves, the use of HY as a catalyst showed lower temperatures throughout the analysis, which indicates a higher efficiency in cracking atmospheric residue molecules. Furthermore, in the presence of this zeolite there was a greater variety of formed products, being produced gasoline, kerosene and, mainly, diesel. The data also indicate that the HY/MCM-41 catalyst mixture was selective for diesel formation. Thermogravimetric data showed two mass loss events for pure ATR and the appearance of a third initial event for distillates. Among these, the one produced from distillation of the residue with HY had the lowest temperature ranges in the second and third mass loss events, confirming the results found in the boiling range. These findings show the efficiency of the distillation process and the application of zeolite and mesoporous material as a catalyst, since mass losses were anticipated. The anticipation of the onset of thermal degradation reactions is even more evident with the use of zeolite HY.

MEMBROS DA BANCA:
Externa à Instituição - ANA CATARINA FERNANDES CORIOLANO - UnP
Presidente - 350509 - ANTONIO SOUZA DE ARAUJO
Externa à Instituição - REGINA CELIA DE OLIVEIRA BRASIL DELGADO - UFERSA