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Sustainable Ceramic Particles for CSP Applications

Alkan, Gözde and Knoblauch, Nicole and Mechnich, Peter (2023) Sustainable Ceramic Particles for CSP Applications. Helmholtz Energy Conference 2023, 2023-06-12 - 2023-06-13, Koblenz, Deutschland.

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High-temperature-resistant ceramic particles are developed as solar heat absorbers and storage media in point-focused concentrated solar power (CSP) technology [1]. A promising secondary source of raw materials for ceramic particles are metallurgical by-products, frequently referred to as metallurgical slags. The chemical composition of many metallurgical by make them attractive materials for CSP technologies. In particular, by-products varieties with high contents of darkening, transitional metals such as Fe, Mn, Co, and Cu are attractive to solar absorbers requiring high absorptance of solar light. A suitable chemical composition, in particular with low free SiO2 is beneficial for use as filler materials in molten-salt thermal energy-storage (TES) systems. In a pilot study copper-metallurgy-derived fayalite slags were characterized in terms of their material and solar thermal related thermo-physical and thermo-chemical properties. It turns out that solar absorptance and high-temperature stability make them attractive for solar particle absorbers whereas their relative chemical inertness to molten solar-salt, a mixture of NaNO3 and KNO3, makes them durable TES filler materials for operation up to 600°C. For application in CSP technology, fabrication of millimeter-sized, spherical ceramic particles is developed on the basis of oil-drop technology.

Item URL in elib:https://elib.dlr.de/201674/
Document Type:Conference or Workshop Item (Poster)
Title:Sustainable Ceramic Particles for CSP Applications
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Mechnich, PeterUNSPECIFIEDhttps://orcid.org/0000-0003-4689-8197150708360
Date:12 June 2023
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Slag, ceramic particles, solar absorber
Event Title:Helmholtz Energy Conference 2023
Event Location:Koblenz, Deutschland
Event Type:national Conference
Event Start Date:12 June 2023
Event End Date:13 June 2023
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:High-Temperature Thermal Technologies
DLR - Research area:Energy
DLR - Program:E VS - Combustion Systems
DLR - Research theme (Project):E - Materials for High-Temperature Thermal Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Structural and Functional ceramics
Deposited By: Mechnich, Dr.rer.nat. Peter
Deposited On:15 Jan 2024 09:54
Last Modified:24 Apr 2024 21:02

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