Journal
MATERIALS
Volume 5, Issue 1, Pages 192-209Publisher
MDPI
DOI: 10.3390/ma5010192
Keywords
porous media; morphology; transport; radiation; conduction; convection; fluid flow; anisotropy; solar; ceria
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Funding
- Swiss National Science Foundation [200021-115888]
- European Commission [285098]
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High-resolution X-ray computed tomography is employed to obtain the exact 3D geometrical configuration of porous anisotropic ceria applied in solar-driven thermochemical cycles for splitting H2O and CO2. The tomography data are, in turn, used in direct pore-level numerical simulations for determining the morphological and effective heat/mass transport properties of porous ceria, namely: porosity, specific surface area, pore size distribution, extinction coefficient, thermal conductivity, convective heat transfer coefficient, permeability, Dupuit-Forchheimer coefficient, and tortuosity and residence time distributions. Tailored foam designs for enhanced transport properties are examined by means of adjusting morphologies of artificial ceria samples composed of bimodal distributed overlapping transparent spheres in an opaque medium.
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