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Investigations on Thermochemical Energy Storage Based on Manganese-Iron Oxide in a Lab-Scale Reactor

Wokon, Michael and Bauer, Thomas and Linder, Marc (2016) Investigations on Thermochemical Energy Storage Based on Manganese-Iron Oxide in a Lab-Scale Reactor. 22nd SolarPACES Conference, 11.-14. Okt. 2016, Abu Dhabi, United Arab Emirates.

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Thermochemical energy storage based on reversible redox reactions of metal oxides constitutes a promising concept to store thermal energy at high temperatures, which renders those storage materials specifically attractive for the implementation in solar tower plants. Only a few experimental studies on lab-scale storage reactors working with metal oxides have been reported. Therefore, an investigation of granular metal oxides in a packed bed storage reactor is presented with regard to thermal storage characteristics and prevalent limitations influencing thermal charging and discharging. Pure manganese oxide and manganese-iron oxide with a Mn/Fe molar ratio of 2:1 are compared as potential storage materials. The main advantages of the binary oxide are derived from the experimental results. Moreover, heat transfer between solid and gas has been identified to be the main limiting factor for the onward reactions of manganese-iron oxide under the applied experimental conditions.

Item URL in elib:https://elib.dlr.de/109168/
Document Type:Conference or Workshop Item (Speech)
Title:Investigations on Thermochemical Energy Storage Based on Manganese-Iron Oxide in a Lab-Scale Reactor
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Wokon, Michaelmichael.wokon (at) dlr.deUNSPECIFIED
Bauer, Thomasthomas.bauer (at) dlr.deUNSPECIFIED
Linder, Marcmarc.linder (at) dlr.deUNSPECIFIED
Date:2 August 2016
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:thermochemical energy storage; redox reaction; manganese oxide; manganese-iron oxide system; packed bed; direct contact heat transfer; open-loop operation
Event Title:22nd SolarPACES Conference
Event Location:Abu Dhabi, United Arab Emirates
Event Type:international Conference
Event Dates:11.-14. Okt. 2016
Organizer:SolarPACES Organization
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Thermal Energy Storage
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Thermochemical Processes (Storage) (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Wokon, Michael
Deposited On:07 Dec 2016 15:14
Last Modified:07 Dec 2016 15:14

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