Remoção conjugada de óleo e cálcio de água produzida de petróleo utilizando tensoativo

• Ano de defesa: 2013
• Autor(a) principal: Bezerra, Alison Augusto Maia
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Rio Grande do Norte; Brasil; UFRN; Programa de Pós-Graduação em Engenharia Química; Departamento de Engenharia Química
• Palavras-chave em Português: tensoativo iônico; cálcio; água produzida; contaminantes orgânicos; remoção
• Link de acesso: https://repositorio.ufrn.br/handle/123456789/47209

Oil is the main product of the world energy matrix, with contemporary society extremely dependent on this commodity and its derivatives. The petroleum exploration and refining activities are responsible for a high pollutant load generation, among the main, is the produced water. Estimates suggest that the volume of water produced is approximately 250 million barrels per day. The most applied methods for the treatment of produced water are: hydrocyclone, induced air flotation, dissolved air flotation, filtration, precipitation and adsorption, which can be applied in isolation or combined. This study uses the technique of combined oil and metal removal using an ionic surfactant. Through the interaction of ionic surfactant with metal ions present in solution are formed flakes loaded with oil that precipitates. Oil/water and calcium emulsions were prepared by mechanical agitation with and average oil concentration of 300mg/L, while calcium ranged from 563,00mg/L to 1125,85mg/L. It was proposed two statistical models: one for the oil removal percentage and another for the calcium removal percentage, obtained from a factorial design 3² of Box Behnken, using as independent variables the concentrations of calcium and surfactant. The results show that found statistical models are capable of representing the efficiency of oil and calcium removal respecting the studied groups. We can conclude that the formation of the lipophilic flake, obtained in combined removal process, interacts with the dispersed oil in produced water, being decisive for the conjoint removal of oil and calcium fractions in a solid-liquid separation process. The best results indicate a reduction of 93% of the initial concentration of oil and 58% calcium.