Interaction studies between high-density oil and sand particles in oil flotation technology

Lim, M.W. and Lau, E.V. and Poh, P.E. and Chong, W.T. (2015) Interaction studies between high-density oil and sand particles in oil flotation technology. Journal of Petroleum Science and Engineering, 131. pp. 114-121. ISSN 0920-4105, DOI https://doi.org/10.1016/j.petrol.2015.04.016.

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Abstract

In the event of a sand contamination, the first course of action would be to ensure that a successful flotation is through the detachment of oil from sand for the ease of flotation. It is widely recognized that the initial oil-sand contact is crucial for oil removal and recovery. Due to its high viscosity and adhesive nature, high density bunker oil could pick up any silica particles (sand) of any size at a short contact time as low as several milliseconds. Nevertheless, the resulting detachment of sand particles from oil would vary under different conditions. Therefore, this study aims at investigating the interactions between oil and sand to further understand the detachment process between oil and sand in a flotation process under various conditions including pH, temperature, sand particle size and wettability. An increase in the water content in the sand sample from 0 wt to 12 wt aids the liberation of oil from contaminated sand from 0.7 to 65, due to the presence of thin film of water which weakens the attachment forces between the oil and sand particles. On the other hand, the coarse sand particles of 1.0 mm easily detach themselves from the oil layer compared to finer sand particles of 0.125 mm which implicate that the attachment forces between oil and said particles increase with the decrease in sand particle size. An increase in the solution pH from pH 6 to pH 14 and temperature from 20 degrees C to 60 degrees C also showed an increase in the sand detachment efficiencies from 25.1 to 60.9, and from 15.2 to 85.1 respectively for 1 mm sand particle size. Further verification experiments including the differential zeta potential results and the DLVO theory supported the results of these former detachment studies, whereby differential zeta potential results showed that increase in pH increased the repulsive forces between particles, while the increase in temperature did not significantly affect the interparticle forces. Hence, the enhanced detachment efficiency due to increase in temperature is mainly attributed to the decrease in oil viscosity which reduces the adhesiveness of bunker oil which also facilitates oil liberation. Finally, the results are in good agreement with the oil flotation efficiencies. (C) 2015 Elsevier B.V. All rights reserved.

Item Type:	Article
Funders:	Monash University Malaysia, University of Malaya HIR-D000006-16001
Additional Information:	ISI Document Delivery No.: CL8LA Times Cited: 0 Cited Reference Count: 26 Cited References: Ahmadi MA, 2013, J PETROL SCI ENG, V110, P66, DOI 10.1016/j.petrol.2013.07.007 Almalik MS, 1997, J PETROL SCI ENG, V17, P367, DOI 10.1016/S0920-4105(96)00035-6 Alomair O, 2014, J PETROL SCI ENG, V120, P102, DOI 10.1016/j.petrol.2014.05.027 Bellier P., 1979, INT OIL SPILL C, P141 BROMAN D, 1983, MAR ENVIRON RES, V10, P173, DOI 10.1016/0141-1136(83)90009-0 DAI Q, 1995, FUEL, V74, P1858, DOI 10.1016/0016-2361(95)80019-E Goi A, 2006, OZONE-SCI ENG, V28, P37, DOI 10.1080/01919510500479130 Goi A., 2009, WORLD ACAD SCI ENG T, V52, P185 GREGORY J, 1981, J COLLOID INTERF SCI, V83, P138, DOI 10.1016/0021-9797(81)90018-7 HOFF RZ, 1993, MAR POLLUT BULL, V26, P476, DOI 10.1016/0025-326X(93)90463-T Hupka J., 2008, CAN J CHEM ENG, V82, P978 Liu JJ, 2003, LANGMUIR, V19, P3911, DOI 10.1021/la0268092 Liu JJ, 2005, J COLLOID INTERF SCI, V287, P507, DOI 10.1016/j.jcis.2005.02.037 Lu J, 2014, J PETROL SCI ENG, V124, P122, DOI 10.1016/j.petrol.2014.10.016 Merkl N, 2005, INT J PHYTOREMEDIAT, V7, P217, DOI 10.1080/16226510500215662 Painter P, 2010, ENERG FUEL, V24, P5081, DOI 10.1021/ef100765u Pathak V, 2011, J PETROL SCI ENG, V78, P637, DOI 10.1016/j.petrol.2011.08.002 Peng SW, 2009, J HAZARD MATER, V168, P1490, DOI 10.1016/j.jhazmat.2009.03.036 Rufino RD, 2013, J PETROL SCI ENG, V109, P117, DOI 10.1016/j.petrol.2013.08.014 Rushton D. G., 2007, American Journal of Applied Sciences, V4, DOI 10.3844/ajassp.2007.465.478 Smith MT, 2001, IND ENG CHEM RES, V40, P5421, DOI 10.1021/ie0100333 Tao D, 2004, SEPAR SCI TECHNOL, V39, P741, DOI 10.1081/SS-120028444 Turksoy U, 2000, J PETROL SCI ENG, V26, P105, DOI 10.1016/S0920-4105(00)00025-5 Wang J., 2009, J ENV ENG, V136, P147 Zheng CG, 2012, J PETROL SCI ENG, V81, P49, DOI 10.1016/j.petrol.2011.12.019 Zhou H., 2006, IND ENG CHEM RES, V45, P7482 Lim, M. W. Lau, E. V. Poh, P. E. Chong, W. T. Engineering, Faculty /I-7935-2015 Engineering, Faculty /0000-0002-4848-7052 Monash University Malaysia; University of Malaya HIR-D000006-16001 The authors thank the support of Monash University Malaysia and University of Malaya (High Impact Research Grant (HIR-D000006-16001)). 0 ELSEVIER SCIENCE BV AMSTERDAM J PETROL SCI ENG
Uncontrolled Keywords:	Sand contamination, detachment, flotation, bunker oil, carbonate reservoirs, contaminated soils, crude-oil, recovery, bitumen, surfactant,
Subjects:	T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Engineering
Depositing User:	Mr Jenal S
Date Deposited:	18 Apr 2016 00:49
Last Modified:	18 Apr 2016 00:49
URI:	http://eprints.um.edu.my/id/eprint/15761

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