Effects of ultrasound on oily sludge deoiling

Xu, Ning; Wang, Wenxiang; Han, Ping; Luo, Xiaoping

doi:10.1016/j.jhazmat.2009.06.091

Cited by 179 publications

(60 citation statements)

References 5 publications

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“…All these factors contribute to the heating effect of ultrasonic waves, which is a factor in breaking the crystals of deposited material and increasing its solubility in water. When ultrasonic waves pass through the core sample, they accelerate solubility (Xu et al 2009). Finally, these waves increase the solubility of sodium chloride with raising temperature, destroying bonding energy and breaking crystal of deposit.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

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Using ultrasonic as a new approach for elimination of inorganic scales (NaCl): an experimental study

Taheri-Shakib

Hasan

Salimidelshad

et al. 2017

J Petrol Explor Prod Technol

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Because inorganic scales reduce permeability near wellbores, they cause an additional pressure drop in this region (skin damage) and reduce production. NaCl precipitation, particularly in gas-producing wells, is one of the formation damage problems which impair the permeability. The use of backwashing water not only requires a large quantity of water, but is also inefficient. This study examined the effect of the ultrasonic waves in NaCl scale removal. Twenty core samples with different permeabilities were saturated with NaCl. After precipitation of NaCl within the cores, the samples were first subjected to water injection and then to water injection with ultrasonic wave radiation. At each stage, the permeability of cores was measured and recorded. Experimental results reveal that applying ultrasonic waves restores the permeability of cores more than water injection alone. In samples with permeability lower than 20, 30-100, 100-700 md and cores with permeabilities higher than 1000 md, ultrasonic waves recover permeability to 80, 42, 87 and 81%, respectively. In contrast, water injection alone improves permeability to 29, 18.5, 62 and 77%, respectively. The effect of these waves is much more obvious than water injection alone in low-permeability cores. SEM images from cores show that ultrasonic waves destroy the structure of deposits of sodium chloride. This phenomenon is due to propagation of these waves and the resulting temperature increase in the surroundings, which leads to the increased solubility of these scales. After exposure to ultrasonic waves, sodium chloride deposits inside the induced fractures of cores could be removed from the fracture, whereas water injection alone could not wash and remove the deposits from the fracture. According to the results of this paper, ultrasonic waves can be used as a novel and efficient technology in gas wells to remove inorganic scales in the near-wellbore region.

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Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…In addition, the explosion of existing bubbles in the water phase increases the temperature of system. This temperature rise further increases NaCl solubility in water (Xu et al 2009). …”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Using ultrasonic as a new approach for elimination of inorganic scales (NaCl): an experimental study

Taheri-Shakib

Hasan

Salimidelshad

et al. 2017

J Petrol Explor Prod Technol

View full text Add to dashboard Cite

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“…[6] extends this to include naturally occurring radioactive materials (NORM). [24] also contends that no unique formulae is required in estimating the composition of sludge since its physical, chemical and physio-chemical analyses are to be considered before an accurate composition and elements present can be assessed. [6] confirms this assertion and further noted that the composition of oily sludge is not certain as its make-up is dependent on a number of factors: the large diversity in the quality of crude oils, differences in the processes used for oil-water separation, leakage during industrial processes and it's mixing with the existing oily sludge.…”

Section: Fig-1mentioning

confidence: 99%

“…Slovenia generates approximately 0.001 tons of sludge daily compared with Russia which generates as high as 2,929 tons per day; clearly Russia grapples with more challenges in the management of oily sludge as according to [6], best management practices in the industry is nonexistent. However, [16,24], rather indicate that the lack of willpower and desire to tackle the issue head on is what has resulted in the marginal improvement in the management of this waste though possible solutions and resources exist. Current management practice has therefore been the storing of these wastes in pits, marshes or open earth pool for many years.…”

Section: Volumes Of Daily Oily Sludge Generation/tonmentioning

confidence: 99%

“…Methods of treatment available for sludge management include land farming, incineration solidification/stabilization, solvent extraction, ultrasonic treatment, pyrolysis, photo catalysis, chemical treatment and biological degradation [13,24,25]. However, according to [6] sludge management cannot apply traditional methods of treatment and disposal.…”

Section: Management Of Oily Sludgementioning

confidence: 99%

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A Review of the Impacts and Management of Oily Sludge in the Oil and Gas Industry

Kuranchie¹

2017

IJRET

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Hybrid Extraction of Oily Sludge by Tertiary Amines and Protonated Tertiary Amines

Dai

Zhao

et al. 2020

Chem Eng & Technol

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A green and effective extraction of oily sludge was completed by a hybrid process with tertiary amines (TA) and protonated tertiary amines (PTA), where PTA is the protonated state of TA. Compared with only TA, the crude oil recovery was improved by 3-5 % by the addition of PTA and less solid remained in the recovered crude oil. Additionally, the wettability improved with the absorption of positively charged ions of PTA on the sludge, and the interaction between heavy alkanes of crude oil and PTA promotes the detachment of crude oil from the sludge surface, enhancing the hydrophilicity of sludge. More importantly, the incomplete recovery of TA exactly takes the role of the PTA in the regenerated mixture, which can reduce the loss of solvent.

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Effects of ultrasound on oily sludge deoiling

Cited by 179 publications

References 5 publications

Using ultrasonic as a new approach for elimination of inorganic scales (NaCl): an experimental study

Using ultrasonic as a new approach for elimination of inorganic scales (NaCl): an experimental study

A Review of the Impacts and Management of Oily Sludge in the Oil and Gas Industry

Hybrid Extraction of Oily Sludge by Tertiary Amines and Protonated Tertiary Amines

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