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Air separation and selective oxygen pumping via temperature and pressure swing oxygen adsorption using a redox cycle of SrFeO3 perovskite

Bulfin, Brendan and Lapp, Justin and Richter, Sebastian and Guban, Dorottya and Vieten, Josua and Brendelberger, Stefan and Roeb, Martin and Sattler, Christian (2019) Air separation and selective oxygen pumping via temperature and pressure swing oxygen adsorption using a redox cycle of SrFeO3 perovskite. Chemical Engineering Science, 203, pp. 68-75. Elsevier. doi: 10.1016/j.ces.2019.03.057. ISSN 0009-2509.

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Official URL: https://www.sciencedirect.com/science/article/pii/S0009250919303306?via%3Dihub


The achievement of low oxygen partial pressures is beneficial in a number of applications, including the production of nitrogen for the Habor-Bosch process, one of the largest industrial chemical processes. It has been suggested in the literature that a redox cycle can be utilized for selective oxygen adsorption, with the potential for application in oxygen separation and compression processes. In this work we demonstrate this concept and show the feasibility of using a temperature and pressure swing redox cycle to chemically absorb oxygen gas at a low partial pressure of 10−6 bar. The redox material used was the perovskite oxide SrFeO3, chosen for its relatively low reduction temperature and strong oxygen affinity. The material's intrinsic thermodynamics and low temperature kinetics were both investigated using thermogravimetric analysis. Multiple reduction and oxidation experiments were conducted, with oxidation performed under both synthetic air and inert gas with 1% O2 concentration. The results show successful trials of oxygen removal resulting in inert gasses with ppm level oxygen impurities and no degradation of the material over multiple cycles. Thermodynamic considerations suggest that with further development this technology could offer a very attractive, reversible cycle for the removal of oxygen impurities from gas streams, particularly in combination with conventional pressure swing adsorption.

Item URL in elib:https://elib.dlr.de/131116/
Document Type:Article
Title:Air separation and selective oxygen pumping via temperature and pressure swing oxygen adsorption using a redox cycle of SrFeO3 perovskite
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bulfin, BrendanETH Zürichhttps://orcid.org/0000-0001-9361-0075
Lapp, JustinJustin.Lapp (at) dlr.deUNSPECIFIED
Richter, SebastianSebastian.Richter (at) dlr.deUNSPECIFIED
Guban, Dorottyadorottya.guban (at) dlr.deUNSPECIFIED
Vieten, JosuaJosua.Vieten (at) dlr.dehttps://orcid.org/0000-0002-2060-2039
Brendelberger, StefanStefan.Brendelberger (at) dlr.deUNSPECIFIED
Roeb, MartinMartin.roeb (at) dlr.dehttps://orcid.org/0000-0002-9813-5135
Sattler, ChristianChristian.Sattler (at) dlr.dehttps://orcid.org/0000-0002-4314-1124
Date:10 August 2019
Journal or Publication Title:Chemical Engineering Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.ces.2019.03.057
Page Range:pp. 68-75
Keywords:Thermochemical redox cycle; Oxygen pump; Gas separation; Nitrogen production
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Solar Fuels
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Solar Fuels (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solar Chemical Engineering
Deposited By: Sattler, Prof. Dr. Christian
Deposited On:22 Nov 2019 15:41
Last Modified:22 Nov 2019 15:41

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