scholarly journals Studying the Effect of Some Surfactants on Drag Reduction of Crude Oil Flow

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Ali A. Abdul-Hadi ◽  
Anees A. Khadom
Keyword(s):  
Drag Reduction ◽  
Crude Oil ◽  
Solution Flow Rate ◽  
Additive Concentration ◽  
Solution Flow ◽  
Additive Type ◽  
Dimensionless Groups ◽  
Oil Flow ◽  
Maximum Drag Reduction ◽  
Good Agreement

The influence of SDBS, SLS, SLES, and SS as drag reducing agents on flow of Iraqi crude oil in pipelines was investigated in the present work. The effect of additive type, additive concentration, pipe diameter, solution flow rate, and the presence of elbows on the percentage of drag reduction (%Dr) and the amount of flow increases (%FI) was addressed. The maximum drag reduction was 55% obtained at 250 ppm SDBS surfactant flowing in straight pipes of 0.0508 m I.D. The dimensional analysis was used for grouping the significant quantities into dimensionless groups to reduce the number of variables. The results showed good agreement between the observed drag reduction percent values and the predicted ones with high value of the correlation coefficient.

IMPROVEMENT OF SHARARA CRUDE OIL FLOW USING POLYSTYRENE AND POLYDIMETHYLSILOXANE AS DRAG REDUCING AGENTS

2019 ◽  
Vol 2 (1) ◽  
pp. 14-28
Author(s):  
Rabeeah H. Sultan ◽  
Abduelmaged B. Abduallah ◽  
Omar M. Sultan M. Sultan
Keyword(s):  
Drag Reduction ◽  
Crude Oil ◽  
Friction Factor ◽  
Polymer Concentration ◽  
Polymeric Materials ◽  
Reducing Agents ◽  
Additive Concentration ◽  
Pumping System ◽  
Polymeric Additives ◽  
Oil Flow

In this study the applicability of the Libyan crude oil flow induced by improved lab pumping system was examined in order to evaluate the effect of adding polymeric materials of Polystyrene and Polydimethylsiloxane as drag reducing agents (DRA) on the flow of Sharara crude oil in the pipeline. The polymers are injected through a pumping system at different concentrations rounded between (10-100) ppm. Several experiments were carried out to determine the best concentration of polymer, which satisfied lowest drag force on of crude oil flow rate. Furthermore, the effect of additive concentration on the Viscosity(μ), friction factor (ƒ), percentage drag reduction (%DR) and the amount of flow increases (%FI) were determined. The results show that the activities of Polydimethylsiloxane for Drag reduction is higher than drag reduction for Polystyrene. However, the %DR is generally increased with increasing of polymer concentration for all tested additives. It is progressively increased with increasing Reynolds number (Re) at any specific concentration of the polymeric additives. The friction factor is well correlated with Reynolds numbers and polymer concentration according to the relation of the form ƒ= k ReaCb, the results showed good agreement between the observed values and the predicted ones.

Drag Reduction and Velocity Profiles Distribution of Crude Oil Flow in Spiral Pipes

2015 ◽  
Vol 9 (1) ◽  
pp. 1 ◽  
Author(s):  
Yanuar Yanuar ◽  
Kurniawan T. Waskito ◽  
Gunawan Gunawan ◽  
Budiarso Budiarso
Keyword(s):  
Drag Reduction ◽  
Crude Oil ◽  
Velocity Profiles ◽  
Oil Flow

New Heavy Crude Oil Flow Improver Increases Production: Application Scenarios

2008 ◽  
Author(s):  
W. Reid Dreher ◽  
Ray Johnston ◽  
Peter Lauzon ◽  
Joey Pierce
Keyword(s):  
Drag Reduction ◽  
Crude Oil ◽  
Oil Production ◽  
Heavy Crude Oil ◽  
New Class ◽  
Crude Oil Production ◽  
Oil Flow ◽  
Heavy Crude ◽  
Flow Improver

As worldwide heavy crude oil production increases, pipelines are faced with challenges to transport these higher viscosity fluids. Historically, heavy crude oil has been a challenge for existing commercially available DRAs. As crude oil gravities fall below ∼23 °API, existing DRAs become ineffective. ConocoPhillips Specialty Products Inc. (CSPI) developed a new class of DRAs to address this need. CSPI’s new heavy crude oil DRA technology, ExtremePower™ Flow Improvers, is proven to increase deliveries of produced heavy crude oil to market. In this paper we will discuss the mechanism of drag reduction, how a heavy crude oil DRA works, and two scenarios in which value is created by utilizing the product.

An elastic sublayer model for drag reduction by dilute solutions of linear macromolecules

1971 ◽  
Vol 45 (3) ◽  
pp. 417-440 ◽  
Author(s):  
P. S. Virk
Keyword(s):  
Drag Reduction ◽  
Polymer Solution ◽  
Viscous Sublayer ◽  
Skeletal Structure ◽  
Mean Velocity ◽  
Solution Flow ◽  
Sublayer Thickness ◽  
Maximum Drag Reduction ◽  
The Difference ◽  
Polymer Species

Further evidence of a universal maximum drag reduction asymptote is presented. In the elastic sublayer model, inferred therefrom, the mean velocity profile during drag reduction is approximated by three zones: the usual viscous sublayer, an elastic sublayer where the mixing-length constant is derived from the maximum drag reduction asymptote, and an outermost region with Newtonian mixinglength constant. Upon integration the model yields a friction factor relation, parametric in elastic sublayer thickness, which properly reproduces the known features of turbulent dilute polymer solution flow. The dependence of elastic sublayer thickness upon flow and polymeric parameters is inferred from experimental data revealing two hitherto unknown relationships: namely that on Prandtl co-ordinates, 1/f½vs. log Re f½ the difference in slope between a polymer solution and solvent is proportional to the square root of molar concentration and to the three-halves power of backbone chain links in the macromolecule. The proportionality constant in the preceding relationship is approximately the same for several different polymer species of carbon-carbon or similar skeletal structure in various thin solvents; there is an indication that this constant further depends upon the product of solvent viscosity times the cube of the effective bond length per chain link of the polymer species. Some recent results regarding the onset of drag reduction are also summarized.

Effects of Pressure and Channel Depth on Desorption in Microscale Fractal-Like Branching Heat Exchangers

2007 ◽  
Author(s):  
Mario Apreotesi ◽  
Greg Mouchka ◽  
Keith Davis ◽  
Alex Tulchinsky ◽  
Deborah Pence
Keyword(s):  
Heat Exchange ◽  
Flow Rate ◽  
Heat Exchangers ◽  
Ammonia Solution ◽  
Solution Flow Rate ◽  
Channel Height ◽  
Channel Depth ◽  
Solution Flow ◽  
Flow Network ◽  
Oil Flow

Desorption in micro-scale plate heat exchangers having a branching flow network is investigated as a function of oil flow rate, solution flow rate, manifold pressure and channel depth. The solution is an aqueous-ammonia solution with an inlet concentration held fixed at 30%. Mass flow rate and ammonia mass fraction of the generated vapor stream are characterized as is the heat exchange effectiveness of the various heat exchange desorbers. The effects of operating or exit plenum pressure and channel height on desorption and heat transfer characteristics are considered. Microscale channels are employed for enhanced heat and mass transport. The branching nature of the flow network is employed for flow symmetry and low pressure drop penalties. An operational model is generated to correctly size and efficiently integrate the desorber into an absorption cycle.

scholarly journals Study the Characterization of Adding Polymer-Surfactant Agent on the Drag Reduction Phenomena in Pipeline Flow System

2017 ◽  
Vol 13 (2) ◽  
Author(s):  
Sahar A. Dawood
Keyword(s):  
Aqueous Solution ◽  
Reynolds Number ◽  
Drag Reduction ◽  
Friction Factor ◽  
Methyl Cellulose ◽  
Fluid Properties ◽  
Maximum Drag Reduction ◽  
Polymer Surfactant ◽  
Good Agreement

  Abstract     In this study, the effect of carboxylic methyl cellulose (CMC), and sodium dodcyl benzene sulfonate (SDBS) as an aqueous solution on the drag reduction was investigated. Different concentrations of (CMC) and (SDBS) such as (50, 100, 150, 200, 250, 300, 350, 400, 450, and 500 ppm) were used to analyze the aqueous solution properties, including surface tension, conductivity, and shear viscosity. The optimum four concentrations (i.e., 50, 100, 200, and 300 ppm) of fluid properties were utilized to find their effect on the drag reduction. Two different PVC pipe diameters (i.e., 1" and 3/4") were used in this work. The  results showed that blending CMC with SDBS gives a good drag reduction percent about (58%) more than using them individually, friction factor decreasing with increasing Reynolds number and gives good agreement with von Karamn equation and maximum drag reduction (MDR) asymptote. Reynolds number, pipe diameter, and polymer-surfactant concentrations were considered as influencing factors. In addition, critical micelle concentration, the onset of drag reduction, and the interactions between the mixed additives were discussed.  Keyword: CMC, SDBS, drag reduction, friction factor, blending of additives.

Drag reduction by surfactant of crude oil flow in pentagon spiral pipe

2020 ◽  
Author(s):  
Yanuar ◽  
Gunawan ◽  
M. Raihan Setiawan ◽  
Whisnu Febriansyah ◽  
Angga Arianda
Keyword(s):  
Drag Reduction ◽  
Crude Oil ◽  
Oil Flow

Simulation of Crude Oil Transportation with Drag Reduction Agents Using k-ϵ and k-ω Models

2021 ◽  
Author(s):  
Ali Nasir Khalaf ◽  
Asaad A. Abdullah
Keyword(s):  
Experimental Data ◽  
Drag Reduction ◽  
Crude Oil ◽  
Simulated Data ◽  
Fluid Equation ◽  
Oil Transportation ◽  
Different Types ◽  
Oil Flow ◽  
Simulation Results ◽  
Reduction Percentage

This work explores the possibility of using Newtonian turbulence k−ϵ and k−ω models for modelling crude oil flow in pipelines with drag reduction agents. These models have been applied to predict the friction factor, pressure drop and the drag reduction percentage. The simulation results of both models were compared with six published experimental data for crude oil flow in pipes with different types of drag reduction agents. The velocity near the wall was determined using the log law line of Newtonian fluid equation and by changing the parameter ΔB to achieve an excellent agreement with experimental data. Simulated data for k−ϵ model shows better agreement with most experimental data than the k−ω turbulence model.

Utilization of Waste of Enzymes Biomass as Biosorbent for the Removal of Dyes from Aqueous Solution in Batch and Fluidized Bed Column

2020 ◽  
Vol 71 (1) ◽  
pp. 1-12
Author(s):  
Salman H. Abbas ◽  
Younis M. Younis ◽  
Mohammed K. Hussain ◽  
Firas Hashim Kamar ◽  
Gheorghe Nechifor ◽  
...  
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Particle Size ◽  
Adsorption Capacity ◽  
Fluidized Bed ◽  
Flow Rate ◽  
Fungal Biomass ◽  
Solution Flow Rate ◽  
Maximum Adsorption Capacity ◽  
Solution Flow

The biosorption performance of both batch and liquid-solid fluidized bed operations of dead fungal biomass type (Agaricusbisporus ) for removal of methylene blue from aqueous solution was investigated. In batch system, the adsorption capacity and removal efficiency of dead fungal biomass were evaluated. In fluidized bed system, the experiments were conducted to study the effects of important parameters such as particle size (701-1400�m), initial dye concentration(10-100 mg/L), bed depth (5-15 cm) and solution flow rate (5-20 ml/min) on breakthrough curves. In batch method, the experimental data was modeled using several models (Langmuir,Freundlich, Temkin and Dubinin-Radushkviechmodels) to study equilibrium isotherms, the experimental data followed Langmuir model and the results showed that the maximum adsorption capacity obtained was (28.90, 24.15, 21.23 mg/g) at mean particle size (0.786, 0.935, 1.280 mm) respectively. In Fluidized-bed method, the results show that the total ion uptake and the overall capacity will be decreased with increasing flow rate and increased with increasing initial concentrations, bed depth and decreasing particle size.

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