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Intensification of naphthenic acids removal by liquid-liquid extraction of synthetic offshore produced water using onboard fuel

2023; Elsevier BV; Volume: 182; Linguagem: Inglês

10.1016/j.psep.2023.11.037

1876-4800

Mayra Stéphanie Damas Pascoal, Ana Caroline Klemz, Silvio Edegar Weschenfelder, Aloisio E. Orlando, Maria de Fátima Rodrigues da Cunha, Byron Rosemberg dos Santos Costa, Sergio Yesid Gómez González, Eloisa dos Santos, Belisa A. Marinho, Luciana Prazeres Mazur, Adriano da Silva, Selene Maria de Arruda Guelli Ulson de Souza, Antônio Augusto Ulson de Souza,

Enhanced Oil Recovery Techniques

In offshore platforms, elevated costs due to effluent quantity, logistics, space limitation, and availability of solvents hinder produced water treatment, leading petrochemical industries to develop feasible backup strategies to create a sustainable treatment of this byproduct. This context motivates the present study's proposal to use diesel oil in offshore facilities as onboard fuel to remove naphthenic acids (model compound of the dissolved organic fraction) through liquid-liquid extraction. Results achieved out in a separation funnel using synthetic produced water ([cyclohexanecarboxylic naphthenic acid]0 = 500 mg/L) and diesel as an extracting solvent (10%) present high removal efficiencies of about 60% of the cyclohexanecarboxylic naphthenic acid present in synthetic water produced at pH 2% and 42% at pH 4. The characterization analysis of the diesel oil after the liquid-liquid extraction process indicates that it is suitable for reuse as fuel within the offshore platform dispensing further treatments.