Study of the scale inhibition by HEDP in a channel flow cell using a quartz crystal microbalance

Garcia, C.; Courbin, G.; Ropital, F.; Fiaud, C.

doi:10.1016/s0013-4686(00)00671-x

Cited by 73 publications

(39 citation statements)

References 11 publications

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“…Additionally, the resulted mass of scale is greatly increased by the fluid velocity, which is not enough to produce a large shear force to remove scale on the pipe walls. The effect of flow rates in accordance with previous findings confirmed that the laminar flow contributed to the scale growth rates together with the increasing flow rates [15].…”

Section: Investigation Of the Induction Time For Caco 3 Formationsupporting

confidence: 91%

“…Calcite is the thermodynamically stable phase of CaCO 3 (14), whereas veterite is a crystal formed in the supersaturated solution [3] and considered as unstable phase [15]. In the presence of 10 ppm Cu 2+ additive and at a temperature of 45 O C, it is shown in Figure 3b that crystal morphology is aragonite (needle) and calcite (cube).…”

Section: Characterisation Of the Crystal Scalementioning

confidence: 99%

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Crystallization of calcium carbonate (CaCO3) in a flowing system: Influence of Cu2+ additives on induction time and crystalline phase transformation

Usmany¹,

Putranto²,

Bayuseno³

et al. 2016

AIP Conference Proceedings

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The Raman spectrum of CaCO 3 polymorphs calcite and aragonite: A combined experimental and computational study The Journal of Chemical Physics 140, 164509 (2014) Abstract. Scaling of calcium carbonate (CaCO 3 ) is commonly found in piping systems in oil, gas, desalination and other chemical processes. The scale may create technical problems, leading to the reduction of heat transfer, increase of energy consumption and unscheduled equipment shutdown. This paper presents crystallization scaling experiments and evaluation of the effect of Cu 2+ additives on the induction time and calcium carbonate transformation. The crystals precursors were prepared using equimolar of CaCl 2 and Na 2 CO 3 resulted in concentrations of 3000 ppm Ca 2+ in the solution. The Cu 2+ in amounts of 0, 1 and 10 ppm was separately added in the solution. The flow rates (20, 35, and 60 mL/min) and elevated temperatures (27, 35 and 45 0 C) were selected in the study. The induction time for crystallization of CaCO 3 was observed by measuring the solution conductivity over time, while the phase transformation of calcium carbonate was examined by XRD method and SEM/EDX. It was found that the conductivity remained steady for a certain period reflecting to the induction time of crystal formation, and then decreased sharply afterwards,. The induction time was increased from 34 and 48 minutes in the presence of Cu additives (1 and 10 ppm), depending on the flow rates and temperature observed. In all the experiments, the Cu 2+ addition leads to the reduction of mass of crystals. Apparently, the presence of Cu 2+ could inhibit the CaCO 3 crystallization. In the absence of Cu 2+ and at elevated temperature, the crystals obtained were a mixture of vaterite and calcite. In the presence of Cu 2+ and at elevated temperature, the crystals formed were aragonite and calcite. Here, the presence of Cu 2+ additives might have controlled the crystal transformation of CaCO 3 .

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Section: Investigation Of the Induction Time For Caco 3 Formationsupporting

confidence: 91%

Section: Characterisation Of the Crystal Scalementioning

confidence: 99%

Crystallization of calcium carbonate (CaCO3) in a flowing system: Influence of Cu2+ additives on induction time and crystalline phase transformation

Usmany¹,

Putranto²,

Bayuseno³

et al. 2016

AIP Conference Proceedings

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“…Examples of well-known crystallization inhibitors and habit modifiers with extended technological and industrial uses are the families of polyphosphates and phosphates [12][13][14][15][16][17][18], carboxylates [19][20][21], polyacrylic acid derivatives [22] and benzotriazoles [23]. These additives are widely used as scale-inhibitors to prevent undesired effects associated with sparingly soluble salts (mainly sulfates and carbonates) precipitating in oil-extraction pipelines [24], industrial boilers, heat-exchangers, house-appliances or water pipes [18,23], mining and mineral processing [17], and desalination plants [15].…”

Section: Introductionmentioning

confidence: 99%

“…These additives are widely used as scale-inhibitors to prevent undesired effects associated with sparingly soluble salts (mainly sulfates and carbonates) precipitating in oil-extraction pipelines [24], industrial boilers, heat-exchangers, house-appliances or water pipes [18,23], mining and mineral processing [17], and desalination plants [15]. They are also used to delay cement [14] or gypsum plaster setting [21].…”

Section: Introductionmentioning

confidence: 99%

Effects of ferrocyanide ions on NaCl crystallization in porous stone

Rodríguez-Navarro

Linares-Fernández

Doehne

et al. 2002

Journal of Crystal Growth

122

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The effects of [Fe(CN) 6 ] 4À ions on the crystallization of NaCl in aqueous solution has been studied, particularly in the situation where the saline fluid percolates through and evaporates from a saturated porous body (i.e., an ornamental porous limestone). In concentrations ranging from 2.48 Â 10 À4 up to 2.85 10 À3 M the additive was able to increase the solution critical supersaturation (up to 8%) resulting in a significant crystallization inhibition effect, which promoted efflorescence growth on the porous stone surface as opposed to subflorescence growth. The former induced no damage to the stone support while the latter always resulted in crystallization pressure development inside the pores, causing granular disintegration-a process also known as ''salt weathering''. Significant changes in NaCl crystal growth morphology (from {1 0 0} towards {1 1 0}, {1 1 1} and {2 1 0} forms) were observed in the presence of ferrocyanide ions, which also promoted the growth of dendrites with their main growth axis parallel to /1 1 1S, and branched along /1 0 0S, at the highest supersaturation. The possible inhibiting mechanism of ferrocyanide on NaCl crystallization and growth is discussed based on the evolution of NaCl growth morphologies, and some practical applications of ferrocyanides to prevent salt damage and enhance desalination in ornamental stones are outlined. r

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“…Hydroxyethylidene-diphosphonic acid was also considered as corrosion inhibitor with nontoxicity in cooling water [22][23][24][25]. Phosphonic acids prevent the scale formation and corrosion process because of hydrolytic stability, ability to form complexes with iron [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Protection of reinforcement steel corrosion by phenyl phosphonic acid pre-treatment PART I: Tests in solutions simulating the electrolyte in the pores of fresh concrete

Etteyeb

Dhouibi

Takenouti

et al. 2015

Cement and Concrete Composites

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The carbon steel electrodes were first treated by immersion in 0.1 M phenyl phosphonic acid (C 6 H 5 P(O)(OH) 2, PPA) solution during 24 or 72 hours, then they were transferred into the corrosion test solution representing interstice pore electrolyte polluted by seawater:sat. Ca(OH) 2 + 0.5M NaCl) to evaluate the protective effectiveness of the pre-treatment. The investigation was performed essentially by polarization curves and electrochemical impedance measurements with rotating disc electrode. Very high protective effect was observed with steel pre-treated during 72 hours with stationary electrode. From polarization and electrochemical impedance spectroscopy experiments, the protective efficiency was found to be in the 90-99% range for 72 hour pre-treatment. This protective property remains effective even one month immersion. EDS analysis showed the presence of the phosphorus on the steel surface, probably due to the presence of iron-PPA complex.

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Study of the scale inhibition by HEDP in a channel flow cell using a quartz crystal microbalance

Cited by 73 publications

References 11 publications

Crystallization of calcium carbonate (CaCO3) in a flowing system: Influence of Cu2+ additives on induction time and crystalline phase transformation

Crystallization of calcium carbonate (CaCO3) in a flowing system: Influence of Cu2+ additives on induction time and crystalline phase transformation

Effects of ferrocyanide ions on NaCl crystallization in porous stone

Protection of reinforcement steel corrosion by phenyl phosphonic acid pre-treatment PART I: Tests in solutions simulating the electrolyte in the pores of fresh concrete

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