Tomography‐Based Multiscale Analyses of the 3D Geometrical Morphology of Reticulated Porous Ceramics

Abstract

X‐ray microtomography with a digital resolution of 30 μm and synchrotron submicrometer tomography with a digital resolution of 350/700 nm are performed on catalyst‐coated reticulate porous ceramic foa, 22[2] 121–45ms. Porosity, specific surface, pore‐size distribution, two‐point correlation function, and minimum size of a representative elementary volume are computed by image processing of the tomographic reconstructions on the mm‐scale‐ and μm‐scale‐sized pores. Numerically determined porosities are experimentally validated by weighing, helium pycnometry, and mercury intrusion porosimetry.

Pore-Scale Numerical Investigation of Pressure Drop Behaviour Across Open-Cell Metal Foams

“…Cubical subsets of the original tomographic datasets were used for determination of the pore size distribution due to heavy computational costs associated with such operations. A detailed description of the application of this technique on consolidated porous media can be found in Maire et al (2007); Petrasch et al (2008b). The mean pore diameter, d p , is calculated as…”

“…Therefore, the MGRV is defined as smallest subset of the porous medium for which the a macroscopic morphological quantity, such as the porosity φ, is computed for subsequent larger subsets of the porous medium, until it asymptotically reaches a constant value within a band of ±δ. In that sense, the edge length of a cubic sub-volume of the porous medium is defined as (Petrasch et al 2008b),…”

Sulphur based thermochemical cycles: Development and assessment of key components of the process

“…characteristics and the effective transport properties of the foam [14]. These effective transport properties have been incorporated in a continuum reactor model developed by spatial averaging the governing equation in the fluid and solid phases.…”

Modelling of solar thermochemical reaction systems

“…An overview of radiation in porous materials with morphology given by CT can be found in (Loretz et al, 2008). Detailed characterisations found in the literature include the determination of radiative properties of opaque reticulate porous structures (Petrasch et al, 2007) and semi-transparent packed beds (Haussener et al, 2010a) as well as effective thermal conductivity (Petrasch et al, 2008b), Darcy and D-F coefficients (Akolkar and Petrasch, 2012), and volumetric heat transfer coefficients (Petrasch et al, 2008a) for reticulate porous foams. These characterisations have been extended to porous materials with changing structure as a result of chemical reactions taking place , porous media with structural anisotropy Suter and Haussener, 2013), and porous structures with dual-scale porosity (Ackermann et al, 2014b(Ackermann et al, , 2017).…”

“…Dense fluidised reactor Stationary reactor Material study CeO 2 (Oles and Jackson, 2015) (Groehn et al, 2016) (Bader et al, 2015;Bala Chandran et al, 2015b) (Bala Chandran et al, 2015aKeene et al, 2013Keene et al, , 2014Lapp et al, 2013;Lapp and Lipiń ski, 2014) t (Wheeler et al, 2014) (Suter et al, 2014) (Dombrovsky et al, 2012;Ganesan et al, 2013a,b) * , , (Ackermann et al, 2014(Ackermann et al, , 2017 ZnO/Zn Geometry only (Akolkar and Petrasch, 2012;Jörg Petrasch, Meier, et al, 2008;Petrasch et al, 2007) Other (Lu et al, 2016) …”