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Effect Of Impurity On The High-Temperature Corrosion Performance Of Alloys In Supercritical CO2

Effect of Impurity on The High-temperature Corrosion Performance of Alloys in Supercritical CO2
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Over the years, the supercritical carbon dioxide (s−CO2) Brayton cycle has been developed as a promising working fluid to replace supercritical water (s−H2O) Rankine cycle. It could be used in various energy systems, including Generation IV nuclear reactors, concentrated solar power plants, fossil fuel thermal power plants, waster heat recovery, etc. due to its merits of high thermal efficiency, simple physical footprint, compact equipment size, high flexibility on operation, simple layout, compact turbomachinery.1

Product Number: 51322-18055-SG
Author: Kaiyang Li, Xue Han, Yimin Zeng
Publication Date: 2022
Industries: Materials Selection and Design , Coatings
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In advanced power generation systems, the supercritical CO2 (s-CO2) Brayton cycle has been developed as a promising technology because of its high efficiency, compactness, and potential to complete carbon capture. Selecting appropriate alloys as the constructional materials is one of the crucial steps to the successful deployment and long-term safe operation of the s-CO2 Brayton cycle. Current work investigates the corrosion behavior of candidate alloys in s-CO2 environments with impurities. The corrosion products are characterized and the possible corrosion mechanism in the high-temperature s-CO2 environment is discussed. Besides, the effect of impurity on the corrosion behavior of alloys is discussed. 

In advanced power generation systems, the supercritical CO2 (s-CO2) Brayton cycle has been developed as a promising technology because of its high efficiency, compactness, and potential to complete carbon capture. Selecting appropriate alloys as the constructional materials is one of the crucial steps to the successful deployment and long-term safe operation of the s-CO2 Brayton cycle. Current work investigates the corrosion behavior of candidate alloys in s-CO2 environments with impurities. The corrosion products are characterized and the possible corrosion mechanism in the high-temperature s-CO2 environment is discussed. Besides, the effect of impurity on the corrosion behavior of alloys is discussed. 

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