Data/hora: 24/09/2024 06:04:40

Biblioteca(s): 	Embrapa Suínos e Aves.	
Data corrente: 	08/11/2017	
Data da última atualização: 	08/11/2017	
Autoria: 	ANTES, F. G.; DIEHL, L. de O.; PEREIRA, J. S. F.; GUIMARÃES, R. C. L.; GUARNIERI, R. A.; FERREIRA, B. M. S.; FLORES, E. M. M.	
Afiliação: 	FABIANE GOLDSCHMIDT ANTES, CNPSA; LIANGE DE OLIVEIRA DIEHL, CNPT; JULIANA S. F. PEREIRA, UFRGS/Departamento de Química Inorgânica; REGINA C. L. GUIMARÃES, CENPES/PETROBRAS; RICARDO A. GUARNIERI, UFSM/Departamento de Química; BIANCA M. S. FERREIRA, CENPES/PETROBRAS; ÉRICO M. M. FLORES, UFSM/Departamento de Química.	
Título: 	Effect of ultrasonic frequency on separation of water from heavy crude oil emulsion using ultrasonic baths.	
Ano de publicação: 	2017	
Fonte/Imprenta: 	Ultrasonics Sonochemistry, v. 35, p. 541 - 546, 2017.	
DOI: 	10.1016/j.ultsonch.2016.03.031	
Idioma: 	Inglês	
Conteúdo: 	Abstract: In this work, a comprehensive study was performed for the evaluation of ultrasound (US) frequency for demulsification of crude oil emulsions. Experiments were performed using ultrasonic baths operating at the following frequencies: 25, 35, 45, 130, 582, 862 and 1146 kHz. Synthetic water-in-oil emulsions with 12%, 35% and 50% of water and medians of droplet size distribution (DSD, D(0.5)) of 5, 10 and 25 lm were prepared using a heavy crude oil (API density of 19). Crude oil demulsification was achieved at frequencies in the range of 25?45 kHz for all tested emulsions. When frequencies higher than 45 kHz were applied, no changes in the characteristics of the crude oil emulsions were observed. Demulsification effi- ciencies of about 65% were achieved at a frequency of 45 kHz after 15 min of US application (emulsions with original water content of 50% and D(0.5) = 10 lm). An important aspect is that no addition of chemical demulsifiers was performed, and the demulsification efficiency was considered high, taking into account that the results were obtained using a non-conventional crude oil. Contrary to the normal application of low-frequency US that has been used for emulsification, the proposed approach seems to be a promising technology for water removal from crude oil emulsions	
Palavras-Chave: 	Demulsão; Remoção de água.	
Thesagro: 	Água; Emulsão; Estado físico; Óleo; Petróleo; Ultrassom.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Suínos e Aves (CNPSA)	
Exemplares: 	CNPSA - (21189-1) - UPC - AP - DD -  -  -  - DIS