Study of effects of blend of plant seed oils on wax deposition tendencies of Nigerian waxy crude oil

Akinyemi, O P; Udonne, Joseph Denis; Oyedeko, Kamilu Folorunsho

doi:10.1016/j.petrol.2017.12.017

Cited by 39 publications

(31 citation statements)

References 5 publications

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“…Recently, polyamine amide from canola oil showed potential as an excellent pour point reducer with small concentration [106]. Akinyemi et al (2018) also reported that Jatropha seeds and castor seed oil were able to reduce the pour point (from 24 • C to 8 • C) and the viscosity of waxy crude oils when a low dosage was used (0.1-0.3 vol %) [18].…”

Section: Pour Point Depressant (Ppd)mentioning

confidence: 99%

“…The developed correlation is applied to predict the onset precipitation and deposition of wax in the pipeline. The standard technique used to investigate wax precipitation is by using a cold finger system, flow loop, or viscometer apparatus [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Nonetheless, the precise modelling of deposition along the pipeline walls is challenging.…”

Section: Introductionmentioning

confidence: 99%

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Wax Formation Mechanisms, Wax Chemical Inhibitors and Factors Affecting Chemical Inhibition

2020

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When crude oil is extracted out of a subterranean reservoir at high temperature and pressure, it is usually transported via a pipeline, where the crude oil experiences radical changes in its physical and chemical properties, instigating numerous complications. Among the various flow assurance problems, wax deposition and build up are among the most commonly found. However, the accurate mechanism of wax deposition is still unclear and is widely debated among researchers. The mechanism under multiphase conditions is also an ambiguity. This review covers the six wax deposition mechanisms, the challenges in multiphase flow conditions, the latest types of chemical inhibitor, and a summary of factors governing chemical inhibitor performance.

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Section: Pour Point Depressant (Ppd)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wax Formation Mechanisms, Wax Chemical Inhibitors and Factors Affecting Chemical Inhibition

2020

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“…The effect of temperature of water for cases (1)(2)(3)(4)(5)(6)(7) For the flow rate of 0.3 m/s of the water, the different temperatures from 55°C to 85°C are considered to investigate the effect on the melting process. The cases (1-7) of Table 2 represent these seven cases.…”

Section: Resultsmentioning

confidence: 99%

Numerical study for removing wax deposition by thermal washing for the waxy crude oil gathering pipeline

Jiang¹,

Liu²,

Zhao

et al. 2020

Science Progress

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Exploring the wax removal process by numerical simulation is beneficial for guiding field operations. In this paper, enthalpy-porosity and volume of fluid (VOF) methods were adopted to simulate the melting process of wax in the crude oil gathering pipeline. The melting patterns and liquid fraction of the wax were used to validate the mathematical model. The results show that the wax melts quickly before the liquid fraction reaches 80%, while the remaining 20% melts very slowly. Since the water with higher density sinks to the lower part of the pipeline, the wax in the lower part of the pipeline melts first, while the wax in the upper part of the pipeline melts slowly. The water temperature and flow rate disproportionately affect the melting process. Increasing the water temperature and flow rate can accelerate the melting process, but the effects on shortening the melting time of wax gradually decrease. Increasing the flow rate, the heat transfer rate and the melting rate are increasing progressively, the change of flow rate also affects the outlet temperature of the pipeline.

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“…This paper offers a brief description of the different flow improvers that are developed from natural products such as canola oil, rapeseed oil, castor seed oil, soybean oil, jatropha seed soil, rubber seed oil. (Akinyemi et al 2016(Akinyemi et al , 2018Chen et al 2016;Zhang et al 2018;Deka et al 2020).…”

Section: Introductionmentioning

confidence: 99%

A study on cashew nut shell liquid as a bio-based flow improver for heavy crude oil

Pandian

Dahyalal

Krishna

et al. 2021

J Petrol Explor Prod Technol

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Transportation of heavy crude oil through pipelines poses a great challenge in oil and gas industry. Crude oil chokes the pipelines when the temperature drops below the pour-point temperature. In the present study, a bio-based additive, i.e., Cashew Nut Shell Liquid (CNSL) has been tested as a flow improver for heavy crude. CNSL was obtained from waste cashew nut shell by means of mechanical extraction, and it was completely characterized. Similarly, the crude oil used in the study was characterized for its physio-chemical properties. Also, the crude oil was subjected to Saturates, Aromatics, Resins and Asphaltene analysis and Fourier Transform Infra-Red analysis. The raw and additive-treated crude oil with different CNSL dosages were subjected to pour-point and rheology measurements and optical micro-imaging analysis which indicated a remarkable improvement in flow whereby an optimum dose of 2000 ppm was observed. Furthermore, the effects of different parameters like shear rate, concentration of the flow improver and the effect of temperature on the crude oil flowability were studied. The process variables were optimized by means of Taguchi method, and the percentage contribution of each parameter was identified with the help of ANOVA table. The results indicate that a remarkable improvement in flow was observed at an optimum dose of 2000 ppm. The contribution of the concentration was found to be around 53%, whereas the contributions of the shear rate and the temperature were only 18.08 and 28.91%, respectively. Therefore, it has been observed that CNSL flow improvers extracted from cheap reasonable resources are more effective as they are cost-effective and eco-friendly when compared to conventional additives.

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Study of effects of blend of plant seed oils on wax deposition tendencies of Nigerian waxy crude oil

Cited by 39 publications

References 5 publications

Wax Formation Mechanisms, Wax Chemical Inhibitors and Factors Affecting Chemical Inhibition

Wax Formation Mechanisms, Wax Chemical Inhibitors and Factors Affecting Chemical Inhibition

Numerical study for removing wax deposition by thermal washing for the waxy crude oil gathering pipeline

A study on cashew nut shell liquid as a bio-based flow improver for heavy crude oil

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