DLS study of a phosphonate induced gypsum scale inhibition mechanism using indifferent nanodispersions as the standards for light scattering intensity comparison

doi:10.17675/2305-6894-2018-7-1-2

Cited by 5 publications

(6 citation statements)

References 35 publications

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“…Meanwhile our recent data on gypsum scale formation [19,34,35], as well as our present work on barite crystallization, reveal that the residual "nanodust" plays a key role in both: the sparingly soluble salt pre-nucleation and nucleation; as well as in an antiscalant efficacy. The latter may reveal itself at the primary steps of inorganic salt crystallization (pre-nucleation; nucleation) and at the secondary step of crystal growth and precipitation.…”

Section: Barite Crystals Formation In Presence Of Antiscalantssupporting

confidence: 57%

Barite crystallization in presence of novel fluorescent-tagged antiscalants

2019

Int. J. Corros. Scale Inhib.

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Formation of barite crystals in a bulk supersaturated aqueous solution at ambient temperature is studied in presence of two novel fluorescent-tagged antiscalants: a bisphosphonate 1-hydroxy-7-(6-methoxy-1,3-dioxo-1H-benzo[de]isoquinolin-2(3H)-yl)heptane-1,1-diyldi-(phosphonic acid), HEDP-F, and a co-polymer of N-allyl-4-methoxy-1,8-naphtalimide with acrylic acid, PAA-F1 by fluorescent microscopy, scanning electron microscopy (SEM), turbidimetry, dynamic light scattering (DLS) and a particle counter technique. Both scale inhibitors at a 20 mg·dm -3 dosage are found to be effective in supersaturated BaSO 4 solutions with saturation index (SI) 10 at 25°C (0.001 mol·dm -3 ). Herewith PAA-F1 reveals a higher efficacy than HEDP-F. At the same time a dramatic impact of foreign background "nanodust" particles on antiscalant efficacy is detected and interpreted in terms of barite nucleation. It is demonstrated, that barite nucleation takes place exclusively on "nanodust" particles as a bulk heterogeneous process. Thus an antiscalant molecule acts not so much as barite nuclei surface modifiers, but as the modifiers of "nanodust" particles. It is shown that inter alia the lower efficacy of HEDP-F relative to PAA-F1 is associated with insoluble barium salts formation by the former reagent (tentatively by Ba 2 HEDP-F·nH 2 O or BaH 2 HEDP-F·mH 2 O). Thus an efficacy evaluation may be strongly affected by the way of antiscalant introduction into the system. Being initially added to the barium brine both antisclants demonstrate greater difference in barite scale inhibition, than in the case of the sulfate brine. Both fluorescent-tagged reagents reveal perfectly an antiscalant location on barite crystals. Despite expectations they cover BaSO 4 crystal surface uniformly, and indicate no special concentration of antiscalant on crystal's kinks, edges etc. Thus the scale inhibitors affect rather the primary nucleation step of barite solid phase formation than the secondary one (macro-crystal growth phase).

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Section: Barite Crystals Formation In Presence Of Antiscalantssupporting

confidence: 57%

Barite crystallization in presence of novel fluorescent-tagged antiscalants

2019

Int. J. Corros. Scale Inhib.

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“…Therefore the main mechanism of gypsum deposit retardation is associated with a significant decrease of the number of initial gypsum nucleation centers formed on the surface of inert nanoimpurities at the moment when the brines get mixed. Recently we got the confirmation of these results by DLS studies of the same gypsum-phosphonate systems [96,97]. The proposed inhibition mechanism seems to be a universal one, and could be spread out on any sparingly soluble salt deposition.…”

Section: Applications In Water Treatment Randdmentioning

confidence: 62%

Synthesis and applications of fluorescent-tagged scale inhibitors in water treatment. A review

Oshchepkov¹,

Tkachenko²,

Popov³

2019

Int. J. Corros. Scale Inhib.

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Fluorescent-tagged scale inhibitor application is a new trend in water treatment. An increasing interest to the fluorescent antiscalants is associated with a need of a better scale inhibitor concentration control in industrial applications: the concentration of antiscalants in the circulating system is usually changed by evaporation of water, reagent sorption on the pipe surfaces and on scale particles, as well as by a periodical discharge of the circulating water with some deposit. This paper considers synthesis, properties and industrial applications of antiscalants bearing a fluorescent fragment. A special focus is done on the covalent implementation of the fluorescent fragment into the polymer matrix, performed in two different ways: (a) the first one includes attachment along with the polymer formation process; (b) the second one is based on the fluorophore binding to the ready-made polymer matrix. An attachment of a fluorescent fragment to the bisphosphonate is also described. Besides the issues of antiscalant concentration monitoring in industrial facilities, the unique opportunity of the scale inhibition theory development via the direct visualization of fluorescent-tagged scale inhibitors in various scale formation processes is demonstrated. A recent progress in scale inhibition mechanism understanding due to an antiscalant visualization in situ is highlighted.

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“…NPs can be used as an internal light scattering intensity reference to afford new insight into the mechanism of the scale inhibition. Popov et al used different concentrations of SiO 2 and/or silver (Ag) nanoparticles as internal dynamic light scattering intensity references, in order to display a semiquantitative measurement of a relative gypsum scale formation in bulk solution and in the system treated with common SIs such as phosphonates: amino-tris(methylenephosphonic acid) (ATMP); 1-hydroxyethane-1,1-bis(phosphonicacid) (HEDP); 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC). , …”

Section: Nanomaterials For Scale Inhibitionmentioning

confidence: 99%

Review of Nanotechnology Impacts on Oilfield Scale Management

Mady

Kelland

2020

ACS Appl. Nano Mater.

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Nanotechnology has grown rapidly in both research and applications over the past two decades including in the upstream petroleum industry. A recent hot area for studying nanotechnology has been oilfield scale management. The formation of oilfield scale deposits such as calcium carbonate and Group II sulfate scales in conduits and on equipment, both downhole and topside, can cause serious loss of hydrocarbon production and unwanted downtime. Scale management is expensive to the field operator, mostly due to downtime causing deferred or loss of production. Many types of nano-based materials and treatments have been developed to combat this problem, most of them containing one form or another of an organic scale inhibitor. In this review, we reviewed the various types of nanotechnologies that have been developed and include comparisons to conventional treatments where available. The nanotechnologies include nanoemulsions, nanoparticles, magnetic nanoparticles, polymer nanocomposites, carbon-based nanotubes, and other miscellaneous technologies. Several nanoproducts developed for squeeze treatments indicate improved squeeze lifetime compared to conventional squeeze treatments. Other potential benefits include improved thermal stability for high-temperature wells, reduced formation damage for water-sensitive wells, and environmental impact.

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DLS study of a phosphonate induced gypsum scale inhibition mechanism using indifferent nanodispersions as the standards for light scattering intensity comparison

Cited by 5 publications

References 35 publications

Barite crystallization in presence of novel fluorescent-tagged antiscalants

Barite crystallization in presence of novel fluorescent-tagged antiscalants

Synthesis and applications of fluorescent-tagged scale inhibitors in water treatment. A review

Review of Nanotechnology Impacts on Oilfield Scale Management

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