Oilfield produced water treatment in internal-loop airlift reactor using electrocoagulation/flotation technique

Ammar, Saad H.; Akbar, Ahmed S.

doi:10.1016/j.cjche.2017.07.020

Cited by 38 publications

(9 citation statements)

References 17 publications

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“…The graphic analysis shows that the pH decreased for all experiments, stabilizing in the range (6.53 and 7.35), as final pH. Behavior that was also observed by (Meneses et al, 2012;Ammar and Akbar, 2018). With the exception of Exp.…”

Section: Influence Of Residence Time and Electrical Potentialsupporting

confidence: 79%

Performance of a two Chambers Reactor for the Treatment of an Oily Effluent by Electro flocculation

Fernandes¹,

Alexandre²,

Saturno³

et al. 2021

IJAEMS

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This work had as objective the development and analysis of a continuum flow reactor and measure its efficiency in the treatment of residual water of the biodiesel purification process using electro flocculation. The reactor was designed with two interconnected chambers with an 0.2 cm opening between then and reaction volume was 0.883 L and an electrolytic area of 351 cm². The electrodes were all aluminum, which were arranged in parallel and with 0.5 cm spacing, whose power was supplied by a DC source. As design variables, the influence of electrical potential (U) and residence time (τ) on: current density, final pH, removal of oils and greases, COD (Chemical Oxygen Demand), turbidity and total solids, in addition to quantification of the sludge mass obtained and the energy cost of the reactor. The best performance was for a potential of 6.0 volts and a τ of 29.43 min, with 90% removal of oils and greases, 53% COD and 4.38 g of sludge, culminating in an energy consumption ranging from 0.708 kWhm -3 to 4.73 kWhm -3 . In addition, by visual analysis of the formation of bubbles and the removal of turbidity (94%), it was concluded that the division of the reactor in two chambers reduced the secondary contamination of the treated effluent.

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Section: Influence Of Residence Time and Electrical Potentialsupporting

confidence: 79%

Performance of a two Chambers Reactor for the Treatment of an Oily Effluent by Electro flocculation

Fernandes¹,

Alexandre²,

Saturno³

et al. 2021

IJAEMS

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“…The percentage of water produced from wells increases with the increasing age of wells [2]. The physical and chemical characteristics of the water produced affect the hydrocarbon composition, the water injection history, and the geographical location of the oil reservoir geology [3]. In addition, the emulsion contains organic and inorganic compounds (Na + , Cl − , CO 3 2− , SO 4 2− , HCO − , etc.…”

Section: Introductionmentioning

confidence: 99%

“…The physical and chemical characteristics of the water produced affect the hydrocarbon composition, the water injection history, and the geographical location of the oil reservoir geology [3]. In addition, the emulsion contains organic and inorganic compounds (Na + , Cl − , CO 3 2− , SO 4 2− , HCO − , etc. ), chemical materials used during the extraction process, and heavy metals (Zn, Cd, Pb, Cu, etc.).…”

Section: Introductionmentioning

confidence: 99%

Separation Emulsion via Non-Ionic Surfactant: An Optimization

2019

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Achieving emulsion stability in the petroleum industry is a major challenge due to several problems encountered in the oil refining process, such as corrosion in equipment, high-pressure drops in pipelines, and catalyst poisoning in upstream facilities. Thus, several methods are applied for emulsion treatment and chemical treatment using surface-active agents, a fundamental method in the petroleum industry. The present work investigated the performance of a non-ionic surfactant in separating water in a crude oil emulsion via the bottle test technique. Then, a Fractional Factorial Design (2 K−1 ) was used to characterise the effect of significant variables. In particular, a Pareto chart was employed and factors such as demulsifier dosage, toluene concentration, pressure, sitting time, and temperature were investigated. Accordingly, the parameters applied were further analysed using a Central Composite Design (CCD) based on the Response Surface Method (RSM). The experimental results based on analysis of Variance (ANOVA) show that demulsifier dosage, temperature, and sedimentation times were the main variables affecting the dehydration process, with the highest F-values being 564.74, 94.53 and 78.65 respectively. The increase in the surfactant dosage before critical concentration, temperature and sitting time leads to boosting dehydration efficiency. In addition, a mathematical model was established for the variables, with a coefficient of determination value of 0.9688. Finally, numerical optimisation was performed on the variables and the results show that the optimal values are 1000 ppm, 15.5 mL, −400 mmHg, 120 min, and 90 • C, for demulsifier dosage, toluene concentration, pressure, sitting time, and temperature, respectively.

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“…A similar combination of mild and stainless steel electrodes was used by Manilal et al (2020) for treating synthetic PW, crude oil sample received from a refinery in Kochi, India and reported COD reduction by 99.7% and oil & grease (O&G) reduction by 96.43%. Ammar & Akbar (2018) treated PW by EC in internal loop airlift reactor and reported it to be highly efficient and less energy consuming than other conventional existing electrochemical cells using sacrificial Al electrodes. It resulted in 90% removal of oil and turbidity from PW.…”

Section: Introductionmentioning

confidence: 99%

Produced Water Treatment By Electrocoagulation Process: Experimental and Modelling Study

Agrawal

Nawaz

2022

Preprint

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Produced water (PW) is the largest by-product that comes out from wells during oil & gas (O&G) fields exploration. These waters contain high saline content along with other organic and inorganic composition. A mathematical model specifically for treatment of PW with electrocoagulation (EC) techniques has been developed. The mechanistic model considers the dominant Al species contribution to COD removal, multi-scale modelling of the EC reactor, the role of Al chloro complex species in impacting the COD removal and the development of mechanistic approach for the removal of COD by the Al complexes dominantly present in the system. The influence of experimental and model working parameters such as current density (10-20 mA/cm2), initial pH (3.1-8.6), interelectrode distance (1.35-4 cm), mixing speed (130-300 rpm) and scale up of EC reactor (0.3-1.5 L) on Al concentration and COD removal was investigated and modelled. The results showed that EC at the current density of 20 mA/cm2 enabled higher COD removal (78.3%) than at the current density of 10 mA/cm2 (68.3%) and 15 mA/cm2 (75%) and mathematical model prediction of COD removal fits well with the experimental data at 10 mA/cm2, and 15 mA/cm2 with R2 value of 0.96 and 0.97, respectively. The initial pH of 7.3 resulted in higher COD removal (95.85%) than the initial pH of 3.1 (64.5%), 6.1 (79.1%) and 8.6 (81.2%) and model reproduces a good fit at initial pH of 6.1, 7.3 and 8.6 with R2 value of 0.92, 0.96 and 0.98, respectively. The variation of constants involved in the model formulation was optimized according to the effect of model working parameters.

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Oilfield produced water treatment in internal-loop airlift reactor using electrocoagulation/flotation technique

Cited by 38 publications

References 17 publications

Performance of a two Chambers Reactor for the Treatment of an Oily Effluent by Electro flocculation

Performance of a two Chambers Reactor for the Treatment of an Oily Effluent by Electro flocculation

Separation Emulsion via Non-Ionic Surfactant: An Optimization

Produced Water Treatment By Electrocoagulation Process: Experimental and Modelling Study

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