Effect of flow rate and SiO2 nanoparticle on dynamic corrosion behavior of stainless steels in molten salt for thermal energy storage

Ma, Long; Zhang, Cancan; Wu, Yuting; Lu, Yuanwei

doi:10.1016/j.corsci.2021.109952

Cited by 10 publications

(5 citation statements)

References 21 publications

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“…The stainless steel at different molten salt flow rates was fixed at the specified position in the corrosion sample fixture before the motor was rotated. The detailed parameters have been mentioned in the previous study [7] and different molten salt flow rates can be obtained by Equation (1).…”

Section: Experimental System and Proceduresmentioning

confidence: 99%

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Effect of nitrate-carbonate molten salt flow rate for the 347H corrosion behavior

Gao,

Lu,

Jia

et al. 2024

J. Phys.: Conf. Ser.

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Molten salts have been widely adopted for solar thermal power stations because of their superior thermophysical properties. However, the corrosive effect on the metal material with molten salt is an important factor for the long-term operation of CSP systems. For the study of the corrosive influence on metallic materials of molten salts in dynamic conditions, the corrosion performance of the 347H sample in molten salts at different flow rates was analyzed by using nitrate-carbonate molten salt as the base salt. The findings revealed a higher corrosion rate of the 347H samples under dynamic conditions, compared to static conditions. Moreover, as the flow velocity for the molten salt increases, 347H sample corrosion rates increase. The morphological analysis of the 347H sample revealed that, under molten salt static conditions, a dense corrosion layer was mainly formed in the 347H sample, while, under molten salt dynamic conditions, a grooved structure was observed in the 347H sample. The main corrosion products of 347H samples in different flow rates are composed of Fe2O3, Fe3O4, NiFe2O4 and NaFeO2. Therefore, for changing the molten salt flow rate, the sample’s corrosion morphology changes but does not affect the sample’s corrosion product type.

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Section: Experimental System and Proceduresmentioning

confidence: 99%

“…Concentrated Solar Power (CSP) has attracted increasing attention as a promising technology for solar power generation. Besides, the CSP and thermal energy storage (TES) combine to enable a constant output of stable power [1]. Because of its superior thermal performance, molten salt can be widely applied to CSP plants [2].…”

Section: Introductionmentioning

confidence: 99%

Effect of nitrate-carbonate molten salt flow rate for the 347H corrosion behavior

Gao,

Lu,

Jia

et al. 2024

J. Phys.: Conf. Ser.

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“…Consequently, the firstand second-generation CSP plants (Gen 1 and Gen 2, respectively) have been used the binary nitrate mixture called solar salt made of 60 wt% NaNO 3 and 40 wt% KNO 3 . [8][9][10][11][12][13][14] However, the third generation (Gen 3) will increase the operating temperatures, requiring superior molten salt mixtures (a comparison of Gen 1, 2, and 3 is given in Figure 1). Ternary mixtures based on nitrates, carbonate, and binary mixtures based on chloride have been proposed.…”

Section: Introductionmentioning

confidence: 99%

Perspectives on Solar Salt‐Based Nanofluids Used in Concentrated Solar Power Plants

Pineda,

Rosenkranz,

Pérez

2024

Solar RRL

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Concentrated solar power (CWP) technology has matured sufficiently for large‐scale implementation. In a typical plant, the solar energy is captured by mirrors and directed onto heat‐transfer fluid (HTF), typically a molten salt that is further conveyed to the thermal energy‐storage system before being channeled to power turbines, generating electricity. A major concern about this technology is the need to reduce the levelized cost of electricity, necessitating heightened efficiency to enhance cost competitiveness and foster greater market penetration. One approach to achieve this involves replacing the current nitrate‐based molten salt mixture with nanofluids. They combine nitrate‐based molten salt and small amounts of nanomaterials of different dimensionality. These promising HTFs present a superior performance concerning their physical, thermal, and chemical properties. However, there is a lack of studies related to understanding the effects of nanomaterials and the underlying enhancement theories. Therefore, in this article, a detailed revision of the state of the art in experimental and theoretical studies of nanomaterials in a binary commercial nitrate‐based molten salt (solar salt) as HTF for CWP plants is presented, highlighting the challenges related to their application and future research directions.

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“…In this scenario, electrochemical double layer capacitors (EDLCs) represent a type of supercapacitors that have attracted considerable attention because of their high power density (>10 kW kg –1 ) and excellent electrochemical stability over hundreds of thousands of charge–discharge cycles, − complementing the characteristics of high-capacity energy storage systems, e.g., lithium-ion batteries, , or other energy storage units, including electrochemical (e.g., flow batteries, pseudocapacitors), , chemical (e.g., power-to-gas-to-power), thermal (e.g., molten salt technology), and mechanical (e.g., pumped hydroelectric storage) ones. Among supercapacitors, EDLCs exclusively rely on nonfaradaic charge storage, namely the ion adsorption and the swapping of co-ions for counterions at electrode–electrolyte interfaces, determining the double layer capacitance. − To further extend the applications of supercapacitors, flexible solid-state supercapacitors (FSSSCs) have attracted significant interest because of their distinctive mechanical properties (e.g., bendability and foldability), , lightness and safety (absence of leakage of toxic and corrosive electrolytes), , which, ideally, can be coupled with the main features of traditional EDLCs (e.g., high power density and long-term operation). − These properties turn FSSSCs into suitable candidates for portable and wearable electronics, including biomedical implants and health monitoring devices. − …”

Section: Introductionmentioning

confidence: 99%

“…8,9 Meanwhile, they also play a crucial role in developing decentralized power networks, i.e., the so-called "microgrids", for small-scale self-sufficient organizations 10,11 and even portable and wearable electronics. 12−15 In this scenario, electrochemical double layer capacitors (EDLCs) represent a type of supercapacitors that have attracted considerable attention because of their high power density (>10 kW kg −1 ) 16 and excellent electrochemical stability over hundreds of thousands of charge−discharge cycles, 17−19 complementing the characteristics of high-capacity energy storage systems, e.g., lithium-ion batteries, 20,21 or other energy storage units, including electrochemical (e.g., flow batteries, pseudocapacitors), 22,23 chemical (e.g., power-to-gasto-power), 24 thermal (e.g., molten salt technology), 25 and mechanical (e.g., pumped hydroelectric storage) 26 ones. Among supercapacitors, EDLCs exclusively rely on nonfaradaic charge storage, namely the ion adsorption and the swapping of co-ions for counterions at electrode−electrolyte interfaces, determining the double layer capacitance.…”

Section: Introductionmentioning

confidence: 99%

Functionalized Metallic 2D Transition Metal Dichalcogenide-Based Solid-State Electrolyte for Flexible All-Solid-State Supercapacitors

et al. 2022

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Highly efficient and durable flexible solid-state supercapacitors (FSSSCs) are emerging as low-cost devices for portable and wearable electronics due to the elimination of leakage of toxic/corrosive liquid electrolytes and their capability to withstand elevated mechanical stresses. Nevertheless, the spread of FSSSCs requires the development of durable and highly conductive solid-state electrolytes, whose electrochemical characteristics must be competitive with those of traditional liquid electrolytes. Here, we propose an innovative composite solid-state electrolyte prepared by incorporating metallic two-dimensional group-5 transition metal dichalcogenides, namely, liquid-phase exfoliated functionalized niobium disulfide (f-NbS2) nanoflakes, into a sulfonated poly(ether ether ketone) (SPEEK) polymeric matrix. The terminal sulfonate groups in f-NbS2 nanoflakes interact with the sulfonic acid groups of SPEEK by forming a robust hydrogen bonding network. Consequently, the composite solid-state electrolyte is mechanically/dimensionally stable even at a degree of sulfonation of SPEEK as high as 70.2%. At this degree of sulfonation, the mechanical strength is 38.3 MPa, and thanks to an efficient proton transport through the Grotthuss mechanism, the proton conductivity is as high as 94.4 mS cm–1 at room temperature. To elucidate the importance of the interaction between the electrode materials (including active materials and binders) and the solid-state electrolyte, solid-state supercapacitors were produced using SPEEK and poly(vinylidene fluoride) as proton conducting and nonconducting binders, respectively. The use of our solid-state electrolyte in combination with proton-conducting SPEEK binder and carbonaceous electrode materials (mixture of activated carbon, single/few-layer graphene, and carbon black) results in a solid-state supercapacitor with a specific capacitance of 116 F g–1 at 0.02 A g–1, optimal rate capability (76 F g–1 at 10 A g–1), and electrochemical stability during galvanostatic charge/discharge cycling and folding/bending stresses.

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Effect of flow rate and SiO2 nanoparticle on dynamic corrosion behavior of stainless steels in molten salt for thermal energy storage

Cited by 10 publications

References 21 publications

Effect of nitrate-carbonate molten salt flow rate for the 347H corrosion behavior

Effect of nitrate-carbonate molten salt flow rate for the 347H corrosion behavior

Perspectives on Solar Salt‐Based Nanofluids Used in Concentrated Solar Power Plants

Functionalized Metallic 2D Transition Metal Dichalcogenide-Based Solid-State Electrolyte for Flexible All-Solid-State Supercapacitors

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