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Perovskite oxides for application in thermochemical air separation and Oxygen storage

Vieten, Josua and Bulfin, Brendan and Call, Friedemann and Lange, Matthias and Schmücker, Martin and Francke, Alexander and Roeb, Martin and Sattler, Christian (2016) Perovskite oxides for application in thermochemical air separation and Oxygen storage. Journal of Materials Chemistry A (4), pp. 13652-13659. Royal Society of Chemistry. doi: 10.1039/c6ta04867f. ISSN 2050-7488.

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Official URL: http://pubs.rsc.org/en/Content/ArticleLanding/2016/TA/c6ta04867f#!divAbstract


Perovskites AMO3�d are ideal for thermochemical air separation due to their oxygen nonstoichiometry d, which can be varied by changing the temperature and oxygen partial pressure. We show in this work how materials can be selected for chemical looping air separation from thermodynamic considerations and present thermogravimetric experiments carried out on (Ca,Sr) ferrites and manganites, and doped variants, all synthesized via a citric acid auto-combustion method. SrFe0.95Cu0.05O3�d and Ca0.8Sr0.2MnO3�d show the best gravimetric oxygen storage capacity of all tested materials at T < 1200 �C. The redox reactions are completed in <1 min in air and are highly reversible. A significant reoxidation reaction of reduced samples was observed at temperatures as low as 250 �C at an Oxygen partial pressure of 0.16 bar. We studied phase formation via XRD and lattice expansion during reduction via in situ XRD experiments. The objective is to validate the potential and boundary conditions of such materials to pave the way for competitive air separation based on thermochemical cycling.

Item URL in elib:https://elib.dlr.de/108211/
Document Type:Article
Additional Information:ISI referiertes Journal
Title:Perovskite oxides for application in thermochemical air separation and Oxygen storage
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Vieten, JosuaJosua.Vieten (at) dlr.deUNSPECIFIED
Bulfin, Brendanbrendan.bulfin (at) dlr.deUNSPECIFIED
Call, FriedemannFriedemann.Call (at) dlr.deUNSPECIFIED
Lange, MatthiasMatthias.Lange (at) dlr.dehttps://orcid.org/0000-0003-4747-0010
Schmücker, MartinMartin.Schmuecker (at) dlr.deUNSPECIFIED
Francke, AlexanderAlexander.Francke (at) dlr.deUNSPECIFIED
Roeb, MartinMartin.Roeb (at) dlr.deUNSPECIFIED
Sattler, ChristianChristian.Sattler (at) dlr.dehttps://orcid.org/0000-0002-4314-1124
Date:8 August 2016
Journal or Publication Title:Journal of Materials Chemistry A
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1039/c6ta04867f
Page Range:pp. 13652-13659
Publisher:Royal Society of Chemistry
Keywords:perovskite, redox reaction, air separation, Oxygen storage
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Solar Fuels
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Solar Fuels (old)
Location: Jülich , Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solare Verfahrenstechnik
Institute of Materials Research > Keramische Strukturwerkstoffe
Deposited By: Sattler, Prof. Dr. Christian
Deposited On:24 Nov 2016 09:34
Last Modified:06 Sep 2019 15:30

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