elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Kontakt | English
Schriftgröße: [-] Text [+]

The Cobalt-oxide/Iron-oxide Binary System for Use as High Temperature Thermochemical Energy Storage Material

Block, Tina und Knoblauch, Nicole und Schmücker, Martin (2014) The Cobalt-oxide/Iron-oxide Binary System for Use as High Temperature Thermochemical Energy Storage Material. Thermochimica Acta (577), . Elsevier. DOI: 10.1016/j.tca.2013.11.025. ISSN 0040-6031.

Dieses Archiv kann nicht den gesamten Text zur Verfügung stellen.

Kurzfassung

The use of thermochemical reactions is a promising approach for heat storage applications. Redox-reactions involving multivalent cations are recently envisaged for high temperature applications. In temperature range of 900-1000 °C, however, where heat storage required for concentrated solar power (CSP) processes only few metal oxides with sufficient heat storage capabilities do exist. Binary systems, on the other hand, could provide a wider range of suitable materials. In the present experimental study the cobalt-oxide/iron-oxide binary system is investigated. For pure iron-oxide the transformation of Fe2O3/Fe3O4 occurs at 1392 °C with a reaction enthalpy of 599 J/g. The reaction temperature, however, is far too high for CSP applications. Cobalt-oxide, on the other hand, reacts from Co3O4/CoO at 915 °C with an enthalpy of 576 J/g. Iron-doped cobalt-oxides transform at similar temperature as pure cobalt-oxide but the reaction enthalpy gradually decreases with increasing iron content. Microstructural stability and related long-term reversibility of the chemical reaction, however, is higher with respect to pure cobalt-oxide. Compositions of around 10 % iron-oxide were identified having appropriate enthalpies and being beneficial in terms of microstructural stability.

Dokumentart:Zeitschriftenbeitrag
Titel:The Cobalt-oxide/Iron-oxide Binary System for Use as High Temperature Thermochemical Energy Storage Material
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Block, TinaWF-KSW
Knoblauch, NicoleWF-KSW
Schmücker, MartinWF-KSW
Datum:10 Februar 2014
Erschienen in:Thermochimica Acta
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
DOI :10.1016/j.tca.2013.11.025
Seitenbereich:
Verlag:Elsevier
ISSN:0040-6031
Status:veröffentlicht
Stichwörter:Thermochemical Energy Storage, CoxFe3-xO4, Cobalt-oxide, Iron-oxide, Redox-reactions, Microstructure
HGF - Forschungsbereich:Energie
HGF - Programm:Rationelle Energieumwandlung und Nutzung
HGF - Programmthema:Energieeffiziente Prozesse
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E EV - Energieverfahrenstechnik
DLR - Teilgebiet (Projekt, Vorhaben):E - Thermochemische Prozesse
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Werkstoff-Forschung > Keramische Strukturwerkstoffe
Hinterlegt von: Tina Block
Hinterlegt am:24 Feb 2014 08:04
Letzte Änderung:24 Feb 2014 08:04

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2013 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.