Water-in-oil emulsions separation using an ultrasonic standing wave coalescence chamber

Autor(es)

Giraldo Atehortua, Carlos Mario ^[1] ; Perez, Nicolas ^[2] ; Brizzotti Andrade, Marco Aurelio ^[3] ; Vieira Pereira, Luiz Octavio ^[4] ; Adamowski, Julio Cezar ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Mechatron & Mech Syst Engn, BR-05508900 Sao Paulo - Brazil

^[2] Univ Republica, Fac Ingn, Montevideo 11300 - Uruguay

^[3] Univ Sao Paulo, Inst Phys, Rua Matao 1371, BR-05508090 Sao Paulo - Brazil

^[4] PETROBRAS CENPES, Av Horacio Macedo 950, BR-21941915 Rio De Janeiro - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ULTRASONICS SONOCHEMISTRY; v. 57, p. 57-61, OCT 2019.
• Citações Web of Science: 3

Resumo

C The offshore extraction of crude oil produces stable water in oil emulsion. To separate this emulsion into oil and water phases, the oil/water interfacial film is commonly destroyed by the addition of chemical demulsifiers. The use of an ultrasonic standing wave force field could be an alternative to reduce the dosage of chemical demulsifiers in the coalescence process. In this work, an ultrasonic separator of water in crude oil emulsions is investigated through the use of a high frequency ultrasonic standing wave coalescence chamber. The coalescing chamber uses the acoustic radiation force to induce the coalescence of water droplets at the pressure nodes of a standing wave field. Due to temperature fluctuations, the excitation frequency is controlled to maintain the resonance in the coalescence chamber and the voltage amplitude is controlled to deliver a given acoustic power. Experimental tests using standardized emulsions of water in oil were carried out in a laboratory processing plant. The effects of ultrasound application, flow rate, initial water content, demulsifier dosage and chamber inlet temperature were analyzed. The results show that the use of the acoustic radiation force improves the emulsion separation in all the conditions analyzed, when compared with the gravitational separation technique. (AU)

• Processo FAPESP: 14/08185-2 - Aplicação de técnicas de ultrassom na caracterização, inspeção e processamento de materiais
• Beneficiário: Julio Cezar Adamowski
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional