Exploration of the material property space for chemical looping air separation applied to carbon capture and storage
Publication Date
2018-02-15Journal Title
Applied Energy
ISSN
0306-2619
Publisher
Elsevier
Volume
212
Pages
478-488
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Görke, R., Hu, W., Dunstan, M., Dennis, J., & Scott, S. (2018). Exploration of the material property space for chemical looping air separation applied to carbon capture and storage. Applied Energy, 212 478-488. https://doi.org/10.1016/j.apenergy.2017.11.083
Abstract
Oxy-fuel combustion is one route to large scale carbon capture and storage. Fuel is combusted in oxygen rather than air, allowing pure CO2 to be captured and sequestered. Currently, the required oxygen is produced via cryogenic air separation, which imposes a significant energy penalty. Chemical looping air separation (CLAS) is an alternative process for the production of oxygen, and relies on the repeated oxidation and reduction of solid oxygen carriers (typically metal oxides). The energy efficiency is governed by the thermodynamic properties of the oxygen carrier material, and how well the CLAS process can be heat-integrated with the process consuming oxygen. In this study, key thermodynamic properties have been identified and assessed using a steady state model of a CLAS-oxy-fuel power plant. It is demonstrated that energy penalties as low as 1.5 percentage points can be obtained for a narrow range of material properties. Based on density functional theory calculations, 14 oxygen carrier systems, which are novel or have received little attention, have been identified that could potentially achieve this minimal energy penalty
Sponsorship
EPSRC (EP/K030132/1)
Embargo Lift Date
2100-01-01
Identifiers
External DOI: https://doi.org/10.1016/j.apenergy.2017.11.083
This record's URL: https://www.repository.cam.ac.uk/handle/1810/273488
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