Morphological Characterization and Effective Thermal Conductivity of Dual-Scale Reticulated Porous Structures
dc.contributor.author
Ackermann, Simon
dc.contributor.author
Scheffe, Jonathan R.
dc.contributor.author
Duss, Jonas
dc.contributor.author
Steinfeld, Aldo
dc.date.accessioned
2019-06-20T14:50:42Z
dc.date.available
2017-06-11T14:59:26Z
dc.date.available
2019-06-20T14:50:42Z
dc.date.issued
2014-10-28
dc.identifier.issn
1996-1944
dc.identifier.other
10.3390/ma7117173
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/95172
dc.identifier.doi
10.3929/ethz-b-000095172
dc.description.abstract
Reticulated porous ceramic (RPC) made of ceria are promising structures used in solar thermochemical redox cycles for splitting CO2 and H2O. They feature dual-scale porosity with mm-size pores for effective radiative heat transfer during reduction and µm-size pores within its struts for enhanced kinetics during oxidation. In this work, the detailed 3D digital representation of the complex dual-scale RPC is obtained using synchrotron submicrometer tomography and X-ray microtomography. Total and open porosity, pore size distribution, mean pore diameter, and specific surface area are extracted from the computer tomography (CT) scans. The 3D digital geometry is then applied in direct pore level simulations (DPLS) of Fourier’s law within the solid and the fluid phases for the accurate determination of the effective thermal conductivity at each porosity scale and combined, and for fluid-to-solid thermal conductivity from 10−5 to 1. Results are compared to predictions by analytical models for structures with a wide range of porosities 0.09–0.9 in both the strut’s µm-scale and bulk’s mm-scale. The morphological properties and effective thermal conductivity determined in this work serve as an input to volume-averaged models for the design and optimization of solar chemical reactors.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
MDPI
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Tomography
en_US
dc.subject
Solar
en_US
dc.subject
Thermochemical
en_US
dc.subject
Conductivity
en_US
dc.subject
Reticulated porous ceramic (RPC)
en_US
dc.title
Morphological Characterization and Effective Thermal Conductivity of Dual-Scale Reticulated Porous Structures
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2014-10-24
ethz.journal.title
Materials
ethz.journal.volume
7
en_US
ethz.journal.issue
11
en_US
ethz.pages.start
7173
en_US
ethz.pages.end
7195
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Solar thermochemical production of fuels
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Basel
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02668 - Inst. f. Energie- und Verfahrenstechnik / Inst. Energy and Process Engineering::03530 - Steinfeld, Aldo / Steinfeld, Aldo
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02668 - Inst. f. Energie- und Verfahrenstechnik / Inst. Energy and Process Engineering::03530 - Steinfeld, Aldo / Steinfeld, Aldo
ethz.grant.agreementno
320541
ethz.grant.fundername
EC
ethz.grant.funderDoi
10.13039/501100000780
ethz.grant.program
FP7
ethz.date.deposited
2017-06-11T15:00:00Z
ethz.source
ECIT
ethz.identifier.importid
imp593652b9dead374926
ethz.ecitpid
pub:149351
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-15T10:29:05Z
ethz.rosetta.lastUpdated
2024-02-02T08:21:14Z
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true
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