Scale inhibition performance of sodium carboxymethyl cellulose on heat transfer surface at various temperatures: Experiments and molecular dynamics simulation

Yu, Zhao; Xu, Zhiming; Wang, Bingbing; He, Jiahong

doi:10.1016/j.ijheatmasstransfer.2019.06.091

Cited by 44 publications

(24 citation statements)

References 23 publications

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“…Under a concentration range of 50-200 mg/L, SCMC exhibited 93 and 75% inhibition efficiency by pH displacement method and EIS study, respectively, while in real simulated dynamic circulating cooling water system, SCMC reached a scale inhibition efficiency of 93.2% under 200 mg/L (determined by fouling resistance changes). Based on these results, a further study of molecular dynamics simulation was carried out to explore the scale inhibition mechanism (Zhao et al 2019), results indicated there was a strong interaction between oxygen atoms in SCMC and calcium ions in calcite ( 104) crystal planes, such strong interaction would distort and deform the plane of calcite and further hinder the normal growth of calcite crystal. (Gan et al 2018) Another multifunctional cellulose derivative, borated aminated cellulose citrate (BACC), showed excellent scale inhibition performance in a simulated cooling water, in which the Ca 2þ was concentrated twice contrasted with original brine described in Chinese National Standard method GB/T-16632, as a result, an 91.57% CaCO 3 inhibition efficiency was obtained under the presence of 150 mg/L BACC at 70 °C.…”

Section: Cellulosementioning

confidence: 99%

State of art bio-materials as scale inhibitors in recirculating cooling water system: a review article

Chen

Liu

2022

Water Science and Technology

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During the operation of the circulating cooling water system, the inorganic scale deposition may cause technical problems, such as reduction of heat transfer efficiency in cooling systems and obstruction of pipes. In the industry, chemicals are often used as scale inhibitors in scale deposition control, antiscalants popular in industry are generally phosphorus and nitrogen containing chemicals, which may lead to eutrophication. However, increasing environmental concern and discharge limitations have guided antiscalants to move toward biodegradable, nontoxicity and cost-effectiveness. This paper reviews current researches on application of using bio-materials as scale inhibitors, including proteins and amino acids, polysaccharides, plant extracts, microbial reagents, and microbiological product. The non-bioaccumulation, low cost, readily biodegradability and sustainably available characters promote the development of green scale inhibitor chemistry.

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Section: Cellulosementioning

confidence: 99%

State of art bio-materials as scale inhibitors in recirculating cooling water system: a review article

Chen

Liu

2022

Water Science and Technology

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“…All the carboxyl groups were assumed to be deprotonated in the water phase. 32 Thus, PMA5 and PAA10 had a charge of −10, while PAA5 had a charge of −5. Because of their high structural flexibility, the conformation of each additive is expected to change almost randomly in water.…”

Section: Simulation Methodsmentioning

confidence: 99%

“…8,31,69 In MD simulations, Na + ions have frequently been used as the countercations of negatively charged additives dissolved in water near the calcite surface. 19,32 It is expected that the binding conformations of the additives may be affected by the countercations, as is the case for the conformations of polymers in water. 19,70,71,74−78 2.2.…”

Section: Simulation Methodsmentioning

confidence: 99%

“…Numerous previous studies have suggested that the carboxyl O atoms of poly(carboxylic acid) stably bind to the Ca 2+ ions of CaCO 3 crystal surfaces. 29,32,39 Therefore, it is reasonable to assume that the binding conformation will be stable when the periodicity of the arrangement of the carboxyl groups of the additive is the same as that of the Ca 2+ ions of the calcite surface.…”

Section: Simulation Methodsmentioning

confidence: 99%

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Stable Binding Conformations of Polymaleic and Polyacrylic Acids at a Calcite Surface in the Presence of Countercations: A Metadynamics Study

Nada

2022

Langmuir

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Elucidating the stable binding conformations of additives at the surface of CaCO 3 crystals is essential to biomineralization, scale inhibition, and materials technology. However, accomplishing this by experimental means is rather difficult. In this study, molecular dynamics simulations based on a metadynamics approach were conducted to elucidate the stable binding conformations of a deprotonated polymaleic acid (PMA) additive and two deprotonated poly(acrylic acid) (PAA) additives with different polymerization degrees in the presence of various countercations at a hydrated calcite (104) surface. The simulated free-energy surfaces suggested the existence of several slightly different stable binding conformations for each additive. The appearance of these distinct binding conformations is speculated to originate from different balances of interactions between the additive, the calcite surface, and the countercations. The binding conformations and binding stabilities at the calcite surface were affected by the countercations, with Ca 2+ ions producing a more pronounced effect than Na + ions. Furthermore, the simulation results suggested that the binding stability at the calcite surface was higher for the PMA additive than for the PAA additives, and the PAA additive with a polymerization degree of 10 displayed a binding stability that was similar to or lower than that of the PAA additive with a polymerization degree of 5. The present simulation method provides a new strategy for analyzing the binding conformations of complex additives at material surfaces, developing additives that stably bind to these surfaces, and designing additives to control crystal growth.

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“…from hard water. Or add scale inhibitor [13][14] to the hard water to inhibit the growth of scale. Even though all the above chemical scale-removing methods are effective, long-term use causes chemicals to residue in the water, affecting the environment and even human health.…”

Section: Introductionmentioning

confidence: 99%

Physical Water Treatment using Alternating Variable Frequency Electric Field Device for the Mitigation of Limescale in Industrial Production.

Zhang¹,

Cao²,

Wang³

et al. 2021

Preprint

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Electric field scale inhibition is one of the most promising methods of scale inhibition. In this study, an alternating variable frequency electric field device is presented, it able to prevent the growth of scale in industrial heat exchange equipment effectively. Conduct field test at the heat exchange station to analyze the scale inhibition performance of the device. The test results showed that after using alternating variable frequency electric field device, the scale thickness on the heat exchange surface is significantly reduced, fouling resistance reduced by more than 58%, and the anti-corrosion rate for Fe element content reaches 19.78%, The SEM image of the scale changes from a dense irregular sharp shape to a loose spherical shape. Conclusively, alternating variable frequency electric field device has grate scale inhibition performance. This is of great significance to the field of heat transfer and energy saving.

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Scale inhibition performance of sodium carboxymethyl cellulose on heat transfer surface at various temperatures: Experiments and molecular dynamics simulation

Cited by 44 publications

References 23 publications

State of art bio-materials as scale inhibitors in recirculating cooling water system: a review article

State of art bio-materials as scale inhibitors in recirculating cooling water system: a review article

Stable Binding Conformations of Polymaleic and Polyacrylic Acids at a Calcite Surface in the Presence of Countercations: A Metadynamics Study

Physical Water Treatment using Alternating Variable Frequency Electric Field Device for the Mitigation of Limescale in Industrial Production.

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