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Investigations of the Regeneration Step of a Thermochemical Cycle using Mixed Iron Oxides Coated on SiC Substrates

Neises, Martina und Simon, Heike und Roeb, Martin und Schmücker, Martin und Sattler, Christian und Pitz-Paal, Robert (2011) Investigations of the Regeneration Step of a Thermochemical Cycle using Mixed Iron Oxides Coated on SiC Substrates. In: ASME 5th International Conference on Energy Sustainability. ASME 5th International Conference on Energy Sustainability, 7.-10. Aug. 2011, Washington DC, USA.

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Kurzfassung

A two-step thermochemical cycle for hydrogen production using mixed iron oxides coated on silicon carbide substrates has been investigated. The water-splitting step proceeds at temperatures between 800 and 1000 °C while for the regeneration step temperatures around 1200 °C are needed. A deactivation of the material resulting in a decrease of the hydrogen production within the first couple of cycles was observed in preceding tests. For detailed investigations of the system composed of the redox-material and the substrate small scale samples were tested in a laboratory test-rig. For identification of material changes the samples were investigated via XRD and SEM-EDS analysis. The analysis revealed the reasons for the deactivation of the redox-material. Through parametric studies the influence of the regeneration parameters, namely regeneration temperature and time on the hydrogen production was analysed. A model for the regeneration step was developed describing the performance of the regeneration step as a function of temperature and time and additionally as a function of total regeneration time, i.e. the cumulated time the sample has been regenerated.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:Investigations of the Regeneration Step of a Thermochemical Cycle using Mixed Iron Oxides Coated on SiC Substrates
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Neises, Martinamartina.neises@dlr.de
Simon, Heikeheike.simon@dlr.de
Roeb, Martinmartin.roeb@dlr.de
Schmücker, Martinmartin.schmuecker@dlr.de
Sattler, Christianchristian.sattler@dlr.de
Pitz-Paal, Robertrobert.pitz-paal@dlr.de
Datum:9 August 2011
Erschienen in:ASME 5th International Conference on Energy Sustainability
Referierte Publikation:Ja
In ISI Web of Science:Ja
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
Walker, AndyNREL
Status:veröffentlicht
Stichwörter:thermochemical cycle, water splitting, hydrogen, ferrite
Veranstaltungstitel:ASME 5th International Conference on Energy Sustainability
Veranstaltungsort:Washington DC, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:7.-10. Aug. 2011
Veranstalter :American Society of Mechanical Engineers
HGF - Forschungsbereich:Energie
HGF - Programm:Erneuerbare Energie
HGF - Programmthema:E SF - Solarforschung (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SF - Solarforschung
DLR - Teilgebiet (Projekt, Vorhaben):E - Solare Verfahrenstechnik (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Solarforschung
Institut für Werkstoff-Forschung
Hinterlegt von: Dr.rer.nat. Christian Sattler
Hinterlegt am:29 Aug 2011 11:49
Letzte Änderung:29 Aug 2011 11:49

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