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Stabilizing Particles of Manganese Iron Oxide with Additives for Thermochemical Energy Storage

Preisner, Nicole Carina and Block, Tina and Linder, Marc and Leion, Henrik (2018) Stabilizing Particles of Manganese Iron Oxide with Additives for Thermochemical Energy Storage. Energy Technology, pp. 2154-2165. Wiley. doi: 10.1002/ente.201800211. ISSN 2194-4288.

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Manganese‐iron oxide particles are a promising candidate for both chemical‐looping combustion (CLC) and thermochemical energy storage. In CLC, the ability of metal oxides to oxidize fuels in an oxygen‐free atmosphere and re‐oxidize in air is addressed. Whereas, reaction enthalpy is the main focus of thermochemical energy storage for, e. g. concentrated solar power or an industrial process that requires high temperature levels. Sufficient mechanical strength of the particles while they endure chemical, thermal, or mechanical stress is a crucial factor for both concepts. Particle stability is investigated here by adding 20 wt.% of TiO2, ZrO2, or CeO2 as a supportive material to (Mn0.7Fe0.3)2O3. Thermal cyclization and temperature shock tests are conducted in a packed bed reactor to identify chemical stability as well as the effect of chemical and thermal stress. A subsequent particle size distribution analysis is performed to determine the relevant breakage mechanism. Attrition resistance is tested with a customized attrition jet cup to estimate the mechanical strength of particles. It is found that the high tendency of unsupported manganese‐iron oxide particles towards agglomeration can be improved with any of the chosen additives. The particles with CeO2, and especially with ZrO2, as an additive indicate an increase in resistance towards attrition. However, adding TiO2 has a severe negative impact on the chemical reactivity of the manganese‐iron oxide.

Item URL in elib:https://elib.dlr.de/124983/
Document Type:Article
Title:Stabilizing Particles of Manganese Iron Oxide with Additives for Thermochemical Energy Storage
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Preisner, Nicole CarinaNicole.Preisner (at) dlr.deUNSPECIFIED
Block, TinaTina.Block (at) dlr.deUNSPECIFIED
Linder, Marcmarc.linder (at) dlr.deUNSPECIFIED
Leion, Henrikhenrik.leion (at) chalmers.seUNSPECIFIED
Journal or Publication Title:Energy Technology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1002/ente.201800211
Page Range:pp. 2154-2165
Keywords:Manganese, Iron, Redox chemistry, Thermochemistry, Particle stability
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Thermal Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Thermochemical Processes (Storage) (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Neumann, Nicole
Deposited On:20 Dec 2018 14:47
Last Modified:01 Dec 2020 03:00

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