Investigation of factors affecting on viscosity reduction of sludge from Iranian crude oil storage tanks

Hassanzadeh, Masoumeh; Tayebi, Leila; Dezfouli, Hedieh

doi:10.1007/s12182-018-0247-9

Cited by 26 publications

(10 citation statements)

References 15 publications

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“…Furthermore, an increase in the surfactant concentration resulted in a corresponding increase in emulsion stability. Hassanzadeh et al [79] investigated the influence of factors such as surfactant types, solvents, temperature, pressure, and mixing conditions on emulsions prepared from crude oil storage tanks on Khang Island, Iran. The findings revealed that adjusting the investigated factors could significantly decrease the emulsion viscosity.…”

Section: Parameters Used For the Emulsification Formation Processmentioning

confidence: 99%

An Overview of Recent Advances in State-of-the-Art Techniques in the Demulsification of Crude Oil Emulsions

et al. 2019

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The processing of crude oil often requires the extraction of a large amount of water. Frequently, crude oil is mixed with water to form water-in-crude oil emulsions as the result of factors such as high shear at the production wellhead and surface-active substances that are naturally present in crude oil. These emulsions are undesirable and require demulsification to remove the dispersed water and associated inorganic salts in order to meet production and transportation specifications. Additionally, the demulsification of these crude oil emulsions mitigates corrosion and catalyst poisoning and invariably maximizes the overall profitability of crude oil production. Recently, there has been growing research interest in developing workable solutions to the difficulties associated with transporting and refining crude oil emulsions and the restrictions on produced water discharge. Therefore, this paper reviews the recent research efforts on state-of-the-art demulsification techniques. First, an overview of crude oil emulsion types, formation, and stability is presented. Then, the parameters and mechanisms of emulsification formation and different demulsification techniques are extensively examined. It is worth noting that the efficiency of each of these techniques is dependent on the operating parameters and their interplay. Moreover, a more effective demulsification process could be attained by leveraging synergistic effects by combining one or more of these techniques. Finally, this literature review then culminates with propositions for future research. Therefore, the findings of this study can help for a better understanding of the formation and mechanisms of the various demulsification methods of crude oil to work on the development of green demulsifiers by different sources.

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Section: Parameters Used For the Emulsification Formation Processmentioning

confidence: 99%

An Overview of Recent Advances in State-of-the-Art Techniques in the Demulsification of Crude Oil Emulsions

et al. 2019

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“…The output of oily sludge is increasing year by year. According to statistics, the total amount of oily sludge produced in the world every year reaches 60 million tons [1][2][3], and with the deep development of most oil fields, the output of oily sludge will continue to increase. According to the source, oily sludge can be divided into oilfield oily sludge (OOS), storage and transportation oily sludge (STOS), refinery oily sludge (ROS), and accidental oily sludge (AOS).…”

Section: Introductionmentioning

confidence: 99%

Thermochemical Recycling of Oily Sludge by Catalytic Pyrolysis: A Review

Pan

et al. 2021

Scanning

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The main methods of treating oily sludge at home and abroad and the current research status of oily sludge pyrolysis technology are briefly described, and four commonly used catalysts are introduced: metals, metal compounds, molecular sieves, metal-supported molecular sieves, and biomass catalysts for oily sludge. The influence of pyrolysis, the pyrolysis mechanism, and the product composition of oily sludge with the addition of different catalysts are also discussed. Finally, the development direction of preparing new catalysts and the mixed use of multiple catalysts is proposed as a theory to provide for the efficient and reasonable utilization of oily sludge.

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“…Asphaltenes are a class of polycyclic aromatic hydrocarbon compounds in crude oil, insoluble in paraffin medium, such as n-heptane, easily soluble in aromatic crude oil and organic solvent such as o-xylene [ 1 , 2 ]. The natural asphaltenes in heavy oil tend to accumulate in the crevices of rock and they can also be blocked in wellbore tubing and other equipment [ 3 , 4 ], which greatly reduces the oil recovery rate [ 5 ] and increases the cost of oil displacement in the oil industry [ 6 , 7 , 8 ]. In heavy crude oil, there are many types of asphaltenes [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Emulsification of Surfactant on Oil Droplets by Molecular Dynamics Simulation

Cheng

Yuan

2020

Molecules

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Heavy oil in crude oil flooding is extremely difficult to extract due to its high viscosity and poor fluidity. In this paper, molecular dynamics simulation was used to study the emulsification behavior of sodium dodecyl sulfonate (SDSn) micelles on heavy oil droplets composed of asphaltenes (ASP) at the molecular level. Some analyzed techniques were used including root mean square displacement, hydrophile-hydrophobic area of an oil droplet, potential of mean force, and the number of hydrogen bonds between oil droplet and water phase. The simulated results showed that the asphaltene with carboxylate groups significantly enhances the hydration layer on the surface of oil droplets, and SDSn molecules can change the strength of the hydration layer around the surface of the oil droplets. The water bridge structure between both polar heads of the surfactant was commonly formed around the hydration layer of the emulsified oil droplet. During the emulsification of heavy oil, the ratio of hydrophilic hydrophobic surface area around an oil droplet is essential. Molecular dynamics method can be considered as a helpful tool for experimental techniques at the molecular level.

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Investigation of factors affecting on viscosity reduction of sludge from Iranian crude oil storage tanks

Cited by 26 publications

References 15 publications

An Overview of Recent Advances in State-of-the-Art Techniques in the Demulsification of Crude Oil Emulsions

An Overview of Recent Advances in State-of-the-Art Techniques in the Demulsification of Crude Oil Emulsions

Thermochemical Recycling of Oily Sludge by Catalytic Pyrolysis: A Review

Emulsification of Surfactant on Oil Droplets by Molecular Dynamics Simulation

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