Reconstruction of a Catalyst Pellet

Experimentally determined effective transport properties of porous bodies, e.g., effective diffusivity and permeability, can be compared with the respective effective transport properties of reconstructed porous media. Such a comparison was found to be satisfactory in the case of sandstones or other materials with relatively narrow pore size distribution (Bekri et al., 1995 Liang et al., 2000b Yeong and Torquato, 1998b). Critical verification studies of effective transport properties estimated by the concept of reconstructed porous media for porous catalysts with a broad pore size distribution and similar materials are scarce (Mourzenko et al., 2001). Let us employ the sample of the porous 

The effective diffusivity and permeability of the porous alumina sample G1 were measured in the Graham diffusion cell and in the permeation cell (Salejova et al., 2004), cf. Table 1. The porosity e is separated into macro-porosity macro corresponding to large pores and nano-porosity nano corresponding to small pores, and s — smacro + 8nano- The boundary in the classification between macro-and nano-pores is somewhat arbitrary selected as the inflection point on the integral mercury porosimetry curve in Fig. 14. 

Integral and differential intrusion mercury porosimetry data for sample G1 (from Salejova et al., 2004). 

Textural Analysis and Effective Transport Properties of Sample G1 

The pore structure of the investigated sample G1 on the sub-micron level (with the porosity enano = 0.345) is approximated by the Gaussian-correlated 

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