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Nanomaterials 2019, 9(2), 179; https://doi.org/10.3390/nano9020179

Effect of Carbon Nanoparticles on the Crystallization of Calcium Carbonate in Aqueous Solution

Shanghai Engineering Research Center of Energy-Saving in Heat Exchange Systems, Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai 200090, China
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Received: 20 December 2018 / Revised: 23 January 2019 / Accepted: 28 January 2019 / Published: 1 February 2019
(This article belongs to the Special Issue Nanofluids and Nanofluidics)
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Abstract

Nanofluids have great application prospects in industrial heat exchange systems because they can significantly improve the heat and mass transfer efficiency. However, the presence of nanoparticles in the fluid might also affect the formation and attachment of inorganic scales, such as calcium carbonate, on the heat exchange surface. The effects of carbon nanoparticles on the crystallization of calcium carbonate in aqueous solution were studied by the scale inhibition test, solution analysis, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR). The results showed that carbon nanoparticles had an excellent surface scale inhibition performance for calcium carbonate, which could effectively prevent the adhesion of scale on the heat exchange surface. The carbon nanoparticles did not affect the solubility of calcium carbonate in water, but changed the crystal form of the precipitated calcium carbonate, making it difficult to adsorb on the heat exchange surface and achieving a surface scale inhibition effect. Carbon nanofluids effectively inhibit the adhesion of calcium carbonate to heat exchange surfaces. View Full-Text
Keywords: carbon nanoparticles; nanofluid; scale inhibition; calcium carbonate; crystallization carbon nanoparticles; nanofluid; scale inhibition; calcium carbonate; crystallization
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Wan, C.; Wang, L.-T.; Sha, J.-Y.; Ge, H.-H. Effect of Carbon Nanoparticles on the Crystallization of Calcium Carbonate in Aqueous Solution. Nanomaterials 2019, 9, 179.

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