Research on the porous flow of the mechanism of viscous-elastic fluids displacing residual oil droplets in micro pores

2018 ◽  
Author(s):  
Guanyu Dong
Keyword(s):  
Residual Oil ◽  
Oil Droplets ◽  
Porous Flow ◽  
Elastic Fluids

SHORELINE CLEANUP BY ACCELERATION OF CLAY-OIL FLOCCULATION PROCESSES

1997 ◽  
Vol 1997 (1) ◽  
pp. 235-240 ◽  
Author(s):  
Kenneth Lee ◽  
Tim Lunel ◽  
Peter Wood ◽  
Richard Swannell ◽  
Patricia Stoffyn-Egli
Keyword(s):  
Chemical Analysis ◽  
Oil Spill ◽  
Intertidal Zone ◽  
Surf Zone ◽  
High Water ◽  
Residual Oil ◽  
Oil Droplets ◽  
Oil Emulsion ◽  
Mineral Particles ◽  
High Water Mark

ABSTRACT During the cleanup operations following the Sea Empress oil spill, it was observed that the oil emulsion did not adhere strongly to the shoreline and that fine mineral particles present in the surf waters interacted with oil to form clay-oil floes. In an attempt to enhance clay-oil flocculation, Amroth beach was subjected to repeated “surf washing”: the oiled cobbles from the high water mark were moved down to the intertidal zone using an excavator at low tide. After 4 days of treatment, most of the oil emulsion was removed from the cobbles. We estimate that the majority of the oil was removed as clay-oil flocs and that the remainder was released from the cobbles as a broken surface slick. Microscopic and chemical analysis of samples of flocs and oiled sediments showed that energy imparted to the surf zone resulted in clay-oil flocculation, which increased biodegradation rates of the residual oil. Surf washing increased the availability of fine mineral particles, which (1) minimized the contact of oil directly with the substrate, thereby reducing the adhesion of oil to the shoreline, and (2) prevented the recoalescence of oil droplets, thereby promoting the dispersion of oil within the surf zone.

scholarly journals Movement behavior of residual oil droplets and CO2: insights from molecular dynamics simulations

2022 ◽  
Author(s):  
Yongcheng Luo ◽  
Hanmin Xiao ◽  
Xiangui Liu ◽  
Haiqin Zhang ◽  
Zhenkai Wu ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Graphene Nanosheets ◽  
Dynamics Simulation ◽  
Movement Behavior ◽  
Coulomb Energy ◽  
Residual Oil ◽  
Oil Droplets ◽  
Maximum Peak ◽  
Remaining Oil ◽  
Different Temperatures

AbstractAfter primary and secondary recovery of tight reservoirs, it becomes increasingly challenging to recover the remaining oil. Therefore, improving the recovery of the remaining oil is of great importance. Herein, molecular dynamics simulation (MD) of residual oil droplet movement behavior under CO2 displacement was conducted in a silica nanopores model. In this research, the movement behavior of CO2 in contact with residual oil droplets under different temperatures was analyzed, and the distribution of molecules number of CO2 and residual oil droplets was investigated. Then, the changes in pressure, kinetic energy, potential energy, van der Waals' force, Coulomb energy, long-range Coulomb potential, bond energy, and angular energy with time in the system after the contact between CO2 and residual oil droplets were studied. At last, the g(r) distribution of CO2–CO2, CO2-oil molecules, and oil molecules-oil molecules at different temperatures was deliberated. According to the results, the diffusion of CO2 can destroy residual oil droplets formed by the n-nonane and simultaneously peel off the n-nonane molecules that attach to SiO2 and graphene nanosheets (GN). The cutoff radius r of the CO2–CO2 is approximately 0.255 nm and that of the C–CO2 is 0.285 nm. The atomic force between CO2 and CO2 is relatively stronger. There is little effect caused by changing temperature on the radius where the maximum peak occurs in the radial distribution function (RDF)-g(r) of CO2–CO2 and C–CO2. The maximum peak of g(r) distribution of the CO2–CO2 in the system declines first and then rises with increasing temperature, while that of g(r) distribution of C–CO2 changes in the opposite way. At different temperatures, after the peak of g(r), its curve decreases with the increase in radius. The coordination number around C9H20 decreases, and the distribution of C9H20 becomes loose.

TURBULENT SWIRLING WATER FLOW WITH OIL DROPLETS

2006 ◽  
Vol 18 (1) ◽  
pp. 55-72 ◽  
Author(s):  
T. Kouda ◽  
Yoshimichi Hagiwara
Keyword(s):  
Water Flow ◽  
Oil Droplets

Bioethanol production from thermochemically pre-treated olive mill solid residues using the yeast Pachysolen tannophylus

2013 ◽  
Vol 14 (2) ◽  
pp. 118-124 ◽  
Keyword(s):  
Olive Oil ◽  
Ethanol Yield ◽  
Solid Residue ◽  
Residual Oil ◽  
Edible Fungi ◽  
Pachysolen Tannophilus ◽  
Three Phase ◽  
Different Types ◽  
Pre Treatment ◽  
Olive Mill

Olive oil mill solid residue (OMSR) is the solid waste generated during olive oil production process in three-phase olive mills. It consists of the remaining pulp of olive processing after the extraction of oil, as well as the cracked seeds of the olive fruits, containing thus mainly lignocellulose and residual oil. The commonly used practice for OMSR management is combustion, after having extracted the residual oil by secondary extraction using organic solvents. Other proposed ways of OMSR management are their exploitation as substrate for edible fungi production and compost, and as feedstock for biofuels generation such as methane and bioethanol. In the latter case, the complex carbohydrates (cellulose and hemicellulose) of the lignocellulose of OMSR have to be degraded towards their simple sugars and further fermented via microorganisms. The purpose of the present study was to investigate the effect of thermochemical pre-treatment of OMSR, on the final ethanol yield from the yeast Pachysolen tannophilus. Nine different types of OMSR-based substrates were tested i.e. raw OMSR, hydrolysates generated from pretreated OMSR with NaOH (0.5 %, 1.5 % w/v) and H2SO4 (0.5 %, 1.5 % v/v), and pretreated OMSR with NaOH (0.5 %, 1.5 % w/v) and H2SO4 (0.5 %, 1.5 % v/v) whole biomass. It was shown that in all cases pretreatment enhanced the consumption of carbohydrates as well as ethanol final yields.

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