Knoblauch, Nicole and Mechnich, Peter (2021) A Novel Method for the Preparation of Fibrous CeO2–ZrO2–Y2O3 Compacts for Thermochemical Cycles. Crystals, 11 (8). Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/cryst11080885. ISSN 2073-4352.
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Official URL: https://www.mdpi.com/2073-4352/11/8/885
Abstract
Zirconium-Yttrium-co-doped ceria (Ce0.85Zr0.13Y0.02O1.99) compacts consisting of fibers with diameters in the range of 8–10 µm have been successfully prepared by direct infiltration of commercial YSZ fibers with a cerium oxide matrix and subsequent sintering. The resulting chemically homogeneous fiber-compacts are sinter-resistant up to 1923 K and retain a high porosity of around 58 vol% and a permeability of 1.6–3.3 × 10−10 m² at a pressure gradient of 100–500 kPa. The fiber-compacts show a high potential for the application in thermochemical redox cycling due its fast redox kinetics. The first evaluation of redox kinetics shows that the relaxation time of oxidation is five times faster than that of dense samples of the same composition. The improved gas exchange due to the high porosity also allows higher reduction rates, which enable higher hydrogen yields in thermochemical water-splitting redox cycles. The presented cost-effective fiber-compact preparation method is considered very promising for manufacturing large-scale functional components for solar-thermal high-temperature reactors.
Item URL in elib: | https://elib.dlr.de/147809/ | ||||||||||||
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Document Type: | Article | ||||||||||||
Title: | A Novel Method for the Preparation of Fibrous CeO2–ZrO2–Y2O3 Compacts for Thermochemical Cycles | ||||||||||||
Authors: |
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Date: | July 2021 | ||||||||||||
Journal or Publication Title: | Crystals | ||||||||||||
Refereed publication: | Yes | ||||||||||||
Open Access: | Yes | ||||||||||||
Gold Open Access: | Yes | ||||||||||||
In SCOPUS: | Yes | ||||||||||||
In ISI Web of Science: | Yes | ||||||||||||
Volume: | 11 | ||||||||||||
DOI: | 10.3390/cryst11080885 | ||||||||||||
Publisher: | Multidisciplinary Digital Publishing Institute (MDPI) | ||||||||||||
Series Name: | Crystalline Ceramics | ||||||||||||
ISSN: | 2073-4352 | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | Redox Ceramics CeO2 | ||||||||||||
HGF - Research field: | Energy | ||||||||||||
HGF - Program: | Energy System Design | ||||||||||||
HGF - Program Themes: | Digitalization and System Technology | ||||||||||||
DLR - Research area: | Energy | ||||||||||||
DLR - Program: | E SY - Energy System Technology and Analysis | ||||||||||||
DLR - Research theme (Project): | E - Energy System Technology | ||||||||||||
Location: | Köln-Porz | ||||||||||||
Institutes and Institutions: | Institute of Materials Research > Structural and Functional ceramics | ||||||||||||
Deposited By: | Mechnich, Dr.rer.nat. Peter | ||||||||||||
Deposited On: | 11 Jan 2022 09:08 | ||||||||||||
Last Modified: | 17 Jan 2022 09:17 |
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