Effect of six kinds of scale inhibitors on calcium carbonate precipitation in high salinity wastewater at high temperatures

Li, Xiaochen; Gao, Baoyu; Yue, Qinyan; Ma, Defang; Rong, Hongyan; Zhao, Pei; Teng, Pengyou

doi:10.1016/j.jes.2014.09.027

Cited by 81 publications

(31 citation statements)

References 28 publications

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“…The strongest peak phase calcite is at 29.38 2θ (PDF # 96-101-0926) and veterite is at 27.03 2 θ (PDF # 96-901-5859). This is in accordance with the finding of a previous study has shown that veterite was formed in the initial phase supersaturated CaCO 3 solution, and it could be transformed to calcite in the absence of scale inhibitors [14]. Phase calcite is the phase that is stable while phase veterite is the phase that metastable, most likely between phases vaterite the transformation into calcite [16].…”

Section: Characterisation Of the Crystal Scalesupporting

confidence: 93%

“…At elevated temperature, change in morphology of CaCO 3 scale was also observed. These findings are consistent with the previous studies that the presence of inhibitors at high temperatures can change the crystal morphology [14]. Thus, it can be concluded that the Cu 2+ ions may be potentially effective to control the morphology of the crystal calcium carbonate.…”

Section: Characterisation Of the Crystal Scalesupporting

confidence: 92%

“…The affect of presence Cu 2+ and elevated temperature was significant in change of crystal structure of scale from veterite to aragonite (Fig.5b). This result is also consistent with the previous in presence of scale inhibitor most of the veterite phase was transformed to mixtures of the calcite phase and aragonite phase [14]. Apparently, the effect of temperature can change in the crystal structure [17,18].…”

Section: Characterisation Of the Crystal Scalesupporting

confidence: 91%

“…The higher flow rates of 60 mL/min and temperatures of 35 O C could accelerate the reaction of Ca and CO 3 ions as a result of increasing mass scale of 0.1840 gr. It indicates that the increasing temperature could contribute the acceleration of scale formation [14] and the rising flow rates also lead to increase of mass scale [7,13]. However, the flow rate selected for this study is relatively low and considered as laminar solution (Reynolds number, N RE 175).…”

Section: Investigation Of the Induction Time For Caco 3 Formationmentioning

confidence: 99%

“…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: Characterisation Of the Crystal Scalesupporting

confidence: 93%

Section: Characterisation Of the Crystal Scalesupporting

confidence: 92%

Section: Characterisation Of the Crystal Scalesupporting

confidence: 91%

Section: Investigation Of the Induction Time For Caco 3 Formationmentioning

confidence: 99%

Section: Characterisation Of the Crystal Scalementioning

confidence: 99%

See 3 more Smart Citations

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

View full text Add to dashboard Cite

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Trends in Using Organic Compounds as Scale Inhibitors: Past, Present, and Future Scenarios

Khormali,

Ahmadi

2024

Industrial Scale Inhibition

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Performance and mechanism study of IA‐AMPS‐HPA as an oilfield scale inhibitor: Experimental and molecular dynamics simulation

Wang,

Wei,

et al. 2023

J of Applied Polymer Sci

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In this article, itaconic acid (IA), 2‐acrylamide‐2‐methylpropanesulfonic acid (AMPS), and hydroxypropyl acrylate (HPA) served as the reaction's monomers, deionized water served as the reaction's solvent, and ammonium persulfate served as the reaction's initiator, with isopropanol serving as the chain transfer agent, a terpolymer scale inhibitor (IA‐AMPS‐HPA) was synthesized and used to prevent the growth of calcium carbonate (CaCO3) scale in an oilfield environment. On the effectiveness of scale inhibition, the influence of temperature, scale inhibitor concentration, pH, calcium ion concentration, and salt levels are examined. The results indicate that the scale inhibition rate progressively drops with growing temperature and gradually increases with rising scale inhibitor concentration. The scale inhibition rate reaches 97.67% when the temperature is 60°C, and the scale inhibitor concentration is 60 mg/L. When the temperature is 80°C and the concentration of scale inhibitor is 40 mg/L, the inhibitor's ability to block CaCO3 increases as the salt content rises. The scale inhibition rate is more than 85% when the pH is less than 9. Besides, the Ca2+ concentration is less than 300 mg/L, and the scale inhibition rate declines as the Ca2+ concentration rises, reaching a maximum value of 91.67% when the salt content is 33 g/L. With a rise in pH, the scale inhibition rate dropped. Employing a scanning electron microscope, the morphology of scale samples was described and analyzed. Molecular dynamics was utilized to simulate the interaction between IA‐AMPS‐HPA and the crystallization surface of CaCO3 at varying temperatures. The results show that the binding energy decreases as the system temperature rises and that the reaction between polymer molecules and CaCO3 crystals in the system can be observed by increasing the time step length and the water molecule concentration. The simulation results are with following the observed phenomena.

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Effect of six kinds of scale inhibitors on calcium carbonate precipitation in high salinity wastewater at high temperatures

Cited by 81 publications

References 28 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

Trends in Using Organic Compounds as Scale Inhibitors: Past, Present, and Future Scenarios

Performance and mechanism study of IA‐AMPS‐HPA as an oilfield scale inhibitor: Experimental and molecular dynamics simulation

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