Banca de QUALIFICAÇÃO: BRENO DA SILVA ROCHA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : BRENO DA SILVA ROCHA
DATA : 06/10/2017
HORA: 14:00
LOCAL: AUDITORIO DO PPGEQ
TÍTULO:

"Evaluation of a combined surfactants and polyelectrolytes methodology for produced water treatment."

PALAVRAS-CHAVES:

Petroleum, produced water, combined treatment, polyelectrolyte, surfactants.

PÁGINAS: 80
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
RESUMO:

The ever greater development of alternative energy sources in substitution to petroleum derived fuels has forced this industry to optimize its costs, while keeping health, insurance and environment focus. Due to the high produced water rates in mature onshore fields, the reduction of chemicals while treating this residue provides important financial savings perspective to oil industry. The present study aims to evaluate the synergistic effect of the combined use of a conventional tanine based polyelectrolyte in association with a coconut oil derived surfactant, so as to better use locally available resources. Due to produced water intrinsic instability, a method for producing stable oil in water emulsion (with ~50mg/kg of grease and oil content) was developed. Samples subject molecular absorption analysis in visible region and compared to a standard built with solvent and oil. Chemical treatment’s efficiency was evaluated on the basis of jar-tests with controlled stirring. Treatment with only polyelectrolyte presented results in good agreement with literature, where 40mg/kg were able to withdraw 81 and 85% of the oil content of the produced water residue, fully meeting law requirements. Treatment using only the surfactant was able to achieve this level of cleaning only with 200mg/kg of active matter, providing 86% efficiency. Combined polyelectrolyte and surfactant treatment managed to produce greater efficiency than isolated methods (92%) by using 20mg/kg of the polyelectrolyte and 100mg/kg of the surfactant. It was verified the dependency between tested variables (concentration and efficiency) by the use of deviation analysis (F-test) with 95% confidence. Therefore, it was possible to observe that the combined use of both products could lead to financial savings in produced water treatment while maintaining process sustainability and providing economic use for locally available low cost surfactants.

MEMBROS DA BANCA:
Externo à Instituição - DAMILSON FERREIRA DOS SANTOS - UFERSA
Presidente - 1308273 - EDUARDO LINS DE BARROS NETO
Externo à Instituição - LEDA MARIA OLIVEIRA DE LIMA - UFERSA