Banca de DEFESA: DENNYS CORREIA DA SILVA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : DENNYS CORREIA DA SILVA
DATE: 15/03/2021
TIME: 14:30
LOCAL: Sala virtual
TITLE:

Ionic flocculation and liquid-liquid extraction using surfactants and microemulsified systems to remove oil from produced water

KEY WORDS:

oil produced water; surfactants; microemulsions; ionic flocculation; liquid-liquid extraction.

PAGES: 192
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Tecnologia Química
SPECIALTY: Petróleo e Petroquímica
SUMMARY:

The produced water (AP) is one of the main sources of pollution derived from the oil industry and represents one of the most important environmental concerns. In this work, surfactants and microemulsion systems were used to remove dispersed oil from the AP by ion flocculation and liquid-liquid extraction methods. For experiments involving ionic flocculation, an alternative was presented for the removal of oil from the water produced using the ionic surfactant babassu coconut oil (OCBS) as part of the capture of oil by micellar solubilization, followed by ionic flocculation by Ca₂ + ions. A factorial experimental design was applied in order to optimize the oil removal process (E_R). The experiments investigated the influence of the surfactant concentration + CaCl₂ (C), temperature (T) and agitation speed (v), obtaining E_R = 70.02-91.49%. Subsequently, the influence of pH, CaCl₂/surfactant ratio and oil removal kinetics (t) on the system with the highest E_R was evaluated, obtaining E_R = 100%. Then, the optimal system for greater oil removal was reproduced using microemulsions as flocculants having OCBS as surfactant, presenting E_R = 100%. Thus, it can be said that the application of ionic flocculation using OCBS is an efficient technique in the treatment of PA. For experiments involving liquid-liquid extraction, the systems used were composed of AP as an aqueous phase; aviation kerosene as an oily phase; isoamyl alcohol and 1-butanol as co-active agents; and Dissolvan^® and Lipesa^® as surfactants. An experimental plan was applied to optimize the process and the experiments were carried out according to the Scheffé network, showing oil removal efficiencies (E_R) between 24-99%. The microemulsion extraction point used for the optimization of the process was composed of 60% by weight of AP, 5% by weight of kerosene and 35% by weight of the cosurfactant/surfactant ratio (C/S = 9 ratio). The effects of the C/S ratio, microemulsion load capacity, oil removal kinetics, temperature, and phase separation speed were evaluated. From these tests, it was possible to obtain 100% oil removal using C/S = 9, t = 25 min, T = 50–60 ° C, demonstrating the viability of the evaluated systems. Comparing the two techniques, it was possible to verify that the ionic flocculation presented greater advantage for using fewer components obtaining high values of oil removal.

BANKING MEMBERS:
Interno - 347289 - AFONSO AVELINO DANTAS NETO
Externo ao Programa - 1753094 - ALCIDES DE OLIVEIRA WANDERLEY NETO
Externa ao Programa - 1415919 - KATHERINE CARRILHO DE OLIVEIRA
Externa à Instituição - PAULA ROMYNE DE MORAIS CAVALCANTE NEITZKE - UFERSA
Externo à Instituição - RICARDO PAULO FONSECA MELO - UFERSA
Presidente - 347057 - TEREZA NEUMA DE CASTRO DANTAS