Application of the Avrami Theory for Wax Crystallisation of Synthetic Crude Oil

Hosseinipour, Arya; Japper-Jaafar, Azuraien; Yusup, Suzana; Ismail, Lukman

doi:10.5829/ije.2019.32.01a.03

Cited by 5 publications

(3 citation statements)

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“…Hammami and Mehrotra [14,15] investigated the non-isothermal crystallization of n-paraffins through a model based on the fundamental equation of Ozawa. Recently, Hosseinipour et al [16] analyzed the mechanism of wax crystallization using gravimetric and differential scanning calorimetry methods. The experimental results, obtained from both techniques, showed that the crystals were one-dimensional with rod-like structures.…”

Section: Introductionmentioning

confidence: 99%

Non-isothermal crystallization kinetics of paraffin wax as a phase changing energy storage material

et al. 2020

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Paraffin waxes are becoming increasingly attractive especially on thermal energy storage field. The crystallization process, considered as a major thermal discharging approach, has a significant impact on the thermal performances of paraffin wax. This study aims to comprehend the mechanism of paraffin wax crystallization under non-isothermal conditions by means of Differential Scanning Calorimetry (DSC). Jeziorny and Mo models were applied to reveal the morphology of paraffin wax crystals. Moreover, the non-isothermal crystallization activation energy was calculated through Kissinger and Friedman methods, respectively. Investigations show that the used kinetics models gratifyingly fitted the experimental data, providing crystallization kinetic parameters such as crystallization rate, half-life time (t1/2) as well as the required cooling rate for a designated relative crystallinity. Furthermore, it was found that the average Avrami exponent value is close to 2 which indicates that the crystals are one-dimensional with needle-like morphologies.

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Section: Introductionmentioning

confidence: 99%

Non-isothermal crystallization kinetics of paraffin wax as a phase changing energy storage material

et al. 2020

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“…The most obvious disadvantage of this method is the impossibility of reproducing the thermobaric and kinematic conditions for the formation of wax deposits. The studies carried out on this laboratory installation often differ significantly from the real field data, which is a consequence of its shortcomings indicated earlier [31].…”

Section: Commented [M1]mentioning

confidence: 91%

Development of an Approach for Determining the Effectiveness of Inhibition of Paraffin Deposition on the Wax Flow Loop Laboratory Installation

2021

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The formation of wax deposits is a common phenomenon in the production and transportation of formation fluids. On the territory of the Perm Krai, this problem occurs in half of the mining funds. One of the most common and promising methods of dealing with these deposits is the use of inhibitor regents. The most popular technique for assessing the effectiveness of a wax inhibitor is the «Cold Finger», which has a number of significant drawbacks. This work presents a number of methods for assessing the effectiveness of inhibition of paraffin formation on the laboratory installation «WaxFlowLoop». A number of laboratory studies have been carried out to determine the effectiveness of a paraffin deposition inhibitor for inhibiting the paraffin formation process of four target fluids. Verification of the obtained values was carried out by comparing them with the field data. As a result of laboratory studies, it was found that the value of the inhibitor efficiency, determined by the «Cold Finger» method, differs from the field data by an average of 2 times. At the same time, the average deviation of the results determined at the «WaxFlowLoop» installation from the field data is 8.1%. The correct selection of a paraffin deposition inhibitor and its dosage can significantly increase the inter-treatment period of the well, thereby reducing its maintenance costs and increasing the efficiency of well operation.

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“…The formation of asphaltene-resin-paraffin deposits (ARPD) on the wetted surfaces of downhole equipment and field oil pipelines is a frequent complication in the process of oil extraction [1,2]. The worldwide and Russian experiences of oil field development and exploitation provide evidence for the urgency of this problem [3][4][5]. In Russian deposits, the problem of ARPD formation is representative, the number of oil-producing wells is abnormal, due to ARPD amounting to 70% of their total [6,7].…”

Section: Introductionmentioning

confidence: 99%

Influences of the Water Cut of Pumping Oil and the Mineralization of the Associated Water on the Rate of Sludging

Vyatkin¹,

Mordvinov²,

Ilushin³

et al. 2021

Applied Sciences

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The problem of the formation of organic deposits on the inside surfaces of borehole equipment and oilfield pipelines, which is urgent for all active oil fields, was considered in the study. The formation of these deposits leads to decreased lifespans for oilfield equipment and accidents involving oil pipelines and wells. The aim of our work was to estimate the dependencies of the organic deposition’s formation-rate factor on the water cut of the investigated water–oil emulsion and the mineralization of the water phase. Examination via generation of asphaltene–resin–paraffin deposits on the surfaces of cold rods was carried out with a “Cold Finger” CF-4 unit. Coefficients of specific oil sludging, fluid sludging and rate sludging have been determined. It has been defined that in the definite oilfields, the rate of sludging does not increase as the water content in the emulsion increases. As water-phase mineralization increases, this value remains practically constant.

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Application of the Avrami Theory for Wax Crystallisation of Synthetic Crude Oil

Cited by 5 publications

References 0 publications

Non-isothermal crystallization kinetics of paraffin wax as a phase changing energy storage material

Non-isothermal crystallization kinetics of paraffin wax as a phase changing energy storage material

Development of an Approach for Determining the Effectiveness of Inhibition of Paraffin Deposition on the Wax Flow Loop Laboratory Installation

Influences of the Water Cut of Pumping Oil and the Mineralization of the Associated Water on the Rate of Sludging

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