Acoustically aided coalescence of water droplets and dehydration of crude oil emulsion

다국어 초록 (Multilingual Abstract)

We studied the use of acoustics for coalescence of water droplets and dehydration of crude oil emulsion.
Experimental studies were conducted using acoustic standing waves in a resonant cavity to trap water droplets andenhance oil separation. The focus was on the effect of ultrasound irradiation on crude oil emulsion properties, such asviscosity, water drop radius, shear strength of oil-water interfacial films, and flocculation size of asphaltene. These propertiesare important to the coalescence of water drops in water-oil (W/O) emulsion in the process of oil separation withultrasound. Ultrasound irradiation is able to decrease the emulsion stability, which provides a new insight into theacoustics-aided demulsification mechanism. It can be considered as a supplement of traditional acoustics-aided demulsificationmechanism (ultrasound-induced motion of water droplets). Furthermore, the effects of ultrasonic parameterssuch as the type of ultrasonic field, irradiation time, frequency, and acoustic intensity on dewatering the W/O emulsionare discussed. These results provide guidance for setting the optimum conditions for the separation of W/O emulsionwith ultrasound. Under the optimum conditions, water content in crude oil emulsion can be decreased from 40%to 3.8%, which satisfies the requirement of dehydration for refinery.

참고문헌 (Reference)

1 J. S. Eow, 85 : 357-, 2002

2 X. Xi, 51 : 1014-, 2011

3 G. Zhang, 11 : 374-, 2006

4 L. J. Stack, 12 : 153-, 2005

5 G. D. Pangu, 59 : 3183-, 2004

6 L. A. Crum, 50 : 157-, 1972

7 J. Jiao, 117 : 12549-, 2013

8 C. Browne, 27 : 12025-, 2011

9 J. Zhang, 203-204 : 195-, 2012

10 Y. Jin, 51 : 9213-, 2012

11 G. R. Check, 20 : 378-, 2013

12 S. Nii, 16 : 145-, 2009

13 S. E. Talor, 19 : 770-, 1992

14 D. Sunartio, 129 : 6031-, 2007

15 R. A. Mohammed, 80 : 237-, 1993

16 J. D. McLean, 189 : 242-, 1997

17 R. Aveyard, 139 : 128-, 1990

18 E. E. Isaacs, 46 : 177-, 1990

19 D. D. Eley, 32 : 87-, 1988

20 K. Yosioka, 5 : 167-, 1955

21 M. A. H. Weiser, 56 : 114-, 1984

22 X. Zheng, 97 : 2218-, 1995

23 L. A. Crum, 57 : 1363-, 1975

24 G. D. Pangu, 46 : 289-, 2007

25 J. Wang, 52 : 325-, 2012

26 J. D. McLean, 189 : 242-, 1997

27 Y. Abe, 26 : 817-, 2002

28 G. R. Check, 81 : 72-, 2014