Banca de QUALIFICAÇÃO: KATHERINE CARRILHO DE OLIVEIRA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : KATHERINE CARRILHO DE OLIVEIRA
DATA : 17/08/2018
HORA: 15:00
LOCAL: Auditório do NUPEG
TÍTULO:

Oxidation and liquid-liquid extraction processes using surfactants to remove sulfur from diesel

PALAVRAS-CHAVES:

diesel, sulfur removal, oxidative desulfurization, surfactants, liquid-liquid extraction.

PÁGINAS: 80
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
SUBÁREA: Tecnologia Química
ESPECIALIDADE: Petróleo e Petroquímica
RESUMO:

Sulfur is one of the main contaminants of petroleum-based fuels and is present mainly in oils from mature fields, like most Brazilian onshore fields. The issue of sulfur in the form of SOx originated in burning of these fuels, such as diesel, affects air quality and bring health risks. Sulphur, when present in large quantities, also promotes corrosion of engines, reducing your lifespan. In 2013, ANP has adopted the new specifications for diesel oil (resolution 50/2013), becoming mandatory for nationwide marketing of diesel oil A (without addition of biodiesel) and B (with addition of biodiesel) with a maximum sulfur content of 500 ppm. Removal of sulfur is therefore of interest to the petrochemical industry. Oxidative desulfurization followed by solvent extraction is one of the most promissing techniques for sulfur heretocycles removal such as dibenzothiphene (DBT) and dimethyldibenzothiophene (DMDBT). In this context the present work studied the application of oxidative desulfurization of diesel (1200 ppm of sulfur), followed by liquid-liquid extraction using non-ionic surfactants. Were obtained the parameters related to liquid-liquid extraction and to the oxidation reaction using hydrogen peroxide (H₂O₂) and acetic acid (CH₃COOH) as a catalyst. The reactional parameters such as temperature, time, concentrations of peroxide and acid and the use of a catalyst on the reaction were evaluated using a 2^6-2 fractional factorial design. Sulfur concentration were reduced from 1200 ppm to 220 ppm after one oxidative desulfurization step and one liquid-liquid extraction step using Ultranex NP110. Under the same conditions for a model fuel containing 1200 ppm of DBT in n-dodecane the concentration were reduced to below 3 ppm. Therefore, the oxidation and subsequent extraction with surfactant have proven to be effective in desulfurization of diesel.

MEMBROS DA BANCA:
Interno - 1308273 - EDUARDO LINS DE BARROS NETO
Externo ao Programa - 277058 - GILSON GOMES DE MEDEIROS
Interno - 1670497 - HUMBERTO NEVES MAIA DE OLIVEIRA
Presidente - 347057 - TEREZA NEUMA DE CASTRO DANTAS