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A Novel Method for the Preparation of Fibrous CeO2–ZrO2–Y2O3 Compacts for Thermochemical Cycles

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/
Document Type:Article
Title:A Novel Method for the Preparation of Fibrous CeO2–ZrO2–Y2O3 Compacts for Thermochemical Cycles
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Knoblauch, NicoleNicole.Knoblauch (at) dlr.deUNSPECIFIED
Mechnich, PeterPeter.Mechnich (at) dlr.dehttps://orcid.org/0000-0003-4689-8197
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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