Factors affecting the performance of forward osmosis treatment for oilfield produced water from surfactant-polymer flooding

Li, Li; Shi, Wenxin; Zang, Lihua; Wang, Chen; Yu, Shuili

doi:10.1016/j.memsci.2020.118457

Cited by 13 publications

(4 citation statements)

References 34 publications

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“…Forward osmosis is an osmotically driven membrane technology that has been suggested as a valid tool for the treatment of PW under certain circumstances, especially combined with other treatment units [19,21,22,27,28,[38][39][40][41][42][43][44][45][46][47][48][49][50]. The driving force of the water transport in an FO process is owed to the inherent osmotic pressure difference across the membrane.…”

Section: Introductionmentioning

confidence: 99%

Technical Feasibility of Extraction of Freshwater from Produced Water with Combined Forward Osmosis and Nanofiltration

Mohamed,

Tagliabue,

Tiraferri

2024

Membranes

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This study assesses the technical feasibility of a forward-osmosis-based system for concentrating produced water and extracting freshwater. Forward osmosis was combined with nanofiltration, the latter system used to restore the initial osmotic pressure of the diluted draw solutions while concurrently obtaining the final freshwater product. Three draw solutions, namely, MgCl2, NaCl, and C3H5NaO2, were initially tested against a synthetic water mimicking a pretreated produced water effluent having an osmotic pressure equal to 16.3 bar. MgCl2 was thus selected for high-recovery experiments. Different combinations of draw solution osmotic pressure (30, 40, 60, 80, and 120) and draw-to-feed initial volume ratios (1, 1.6, and 2.2) were tested at the laboratory scale, achieving recovery rates between roughly 35% and 70% and water fluxes between 4 and 8 L m−2h−1. One-dimensional, system-wide simulations deploying the analytical FO water flux equation were utilized to validate the experiments, investigate co-current and counter-current configurations, and understand the system potential. The diluted draw solutions were then transferred to nanofiltration to regenerate their original osmotic pressure. There, the highest observed rejection was 96.6% with an average flux of 21 L m−2h−1, when running the system to achieve 100% relative recovery.

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Section: Introductionmentioning

confidence: 99%

Technical Feasibility of Extraction of Freshwater from Produced Water with Combined Forward Osmosis and Nanofiltration

Mohamed,

Tagliabue,

Tiraferri

2024

Membranes

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“…It is generally believed that the surfactant is mainly responsible for the stability of oil droplets in SP flooding produced water compared with the polymer, decreasing oil–water interfacial tension, and zeta potential on the surface of the oil droplets . There also have been many reports on the treatment of SP flooding-produced water. , However, there are few works on the influences of polymers and surfactants on the stability and treatment of W/O crude oil emulsions in SP flooding applications. Dong et al studied the influence of surfactant on the stability of crude oil emulsion.…”

Section: Introductionmentioning

confidence: 99%

“… 11 There also have been many reports on the treatment of SP flooding-produced water. 12 , 13 However, there are few works on the influences of polymers and surfactants on the stability and treatment of W/O crude oil emulsions in SP flooding applications. Dong et al 14 studied the influence of surfactant on the stability of crude oil emulsion.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Surfactant Type on the Demulsification of the W/O Crude Oil Emulsion Produced by Surfactant–Polymer Flooding

Zhang,

Wang,

Liang

et al. 2024

ACS Omega

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At present, there are many works on the influences of partially hydrolyzed polyacrylamide (HPAM) and surfactant on the stability and treatment of O/W emulsion produced by surfactant−polymer (SP) flooding. However, there are few related reports on the effects of HPAM and surfactant on the demulsification of W/O crude oil emulsion produced by SP flooding. Especially, there is no report on the effect of the surfactant type. In this paper, sodium dodecyl sulfate (SDS), octylphenol polyoxyethylene ether (OP-10), and alkyl C16−18 hydroxypropyl sulfobetaine (HSB1618) were selected as representatives of the anionic surfactant, nonionic surfactant, and zwitterionic surfactant, respectively. Demulsification experiments and interface behavior experiments were conducted to investigate their influences on the demulsification performance of a demulsifier D1. The results showed that the order of the negative effect of the surfactant type on dehydration speed and the dehydration rate of D1 was HPAM + OP-10 > HPAM + HSB1618 > HPAM + SDS. There is no difference in the effect of three surfactants on the conformation adjustment of D1 at the W/O interface, but the properties of the composite W/O interface formed by them and D1 were different. The coalescence time was longest when there were HPAM and OP-10 in water, while the lg(G 1 ′/ G demulsifier ′)/lgG 1 ′ was the smallest, which led to the most difficult demulsification of W/O emulsion. This work can guide surfactant selection during SP flooding from the perspective of produced fluid treatment.

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“…The addition of a water-clearing agent can signifi cantly improve the quality of sewage discharged through crude oil processing. The type of agent must be adjusted, the adaptability of the agent with the existing process must be explored, and the changing emulsifi cation of the produced water must be adapted [8][9][10][11] . The effi ciency of various increasing oil removal processes has been examined to effectively treat polymer-injected oily sewage, ensure the normal operation of water treatment and achieve water quality standards.…”

Section: Introductionmentioning

confidence: 99%

Increasing Effect of Water Clarifiers on the Treatment of Polymer-Containing Oil Production Sewage

Yin

Wang

et al. 2021

Polish Journal of Chemical Technology

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Residual anionic polyacrylamide in polymer-flooding oil production wastewater results in the formation of a thermodynamically stable system. In this study, the effects of three different types of medicaments, namely, cationic, anionic and nonionic agents, in dynamic treatments, such as adding a position, dosage and combined processes of chemical addition, on the oil removal rate of sewage were examined. In the treatment with a single agent, the oil removal rate of the cationic agent CQY-1 and the nonionic agent CHF-2 was ≥ 97.8%. The charge characteristics of different ionic agents for the combined dosing treatment indicated that the oil removal rate was better than that of a single agent; the combined dosing ratio was 50 mg/L CHP-1 and 50 mg/L CHP-2. At 80 mg/L CQY-1, the oil removal rate of the dynamic process was ≥ 98.8%, and the dosage of CQY-1 was reduced from 200 mg/L to 50–150 mg/L, which corresponded to a decrease of 25.0%–75.0%. Therefore, the combined dosing process effectively reduced the single dosage.

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Factors affecting the performance of forward osmosis treatment for oilfield produced water from surfactant-polymer flooding

Cited by 13 publications

References 34 publications

Technical Feasibility of Extraction of Freshwater from Produced Water with Combined Forward Osmosis and Nanofiltration

Technical Feasibility of Extraction of Freshwater from Produced Water with Combined Forward Osmosis and Nanofiltration

Effect of the Surfactant Type on the Demulsification of the W/O Crude Oil Emulsion Produced by Surfactant–Polymer Flooding

Increasing Effect of Water Clarifiers on the Treatment of Polymer-Containing Oil Production Sewage

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