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Tomography-Based Determination of Effective Transport Properties for Reacting Porous Media

[+] Author Affiliations
Sophia Haussener

ETH Zurich, Zurich, Switzerland

Iwan Jerjen, Peter Wyss

EMPA Duebendorf, Duebendorf, Switzerland

Aldo Steinfeld

ETH Zurich, Zurich; Paul Scherrer Institute, Villigen, Switzerland

Paper No. IHTC14-22190, pp. 883-892; 10 pages
doi:10.1115/IHTC14-22190
From:
  • 2010 14th International Heat Transfer Conference
  • 2010 14th International Heat Transfer Conference, Volume 6
  • Washington, DC, USA, August 8–13, 2010
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4941-5 | eISBN: 978-0-7918-3879-2
  • Copyright © 2010 by ASME

abstract

The effective heat and mass transport properties of a porous packed bed of particles undergoing a high-temperature solid-gas thermochemical transformation are determined. The exact 3D geometry of the reacting porous media is obtained by high-resolution computer tomography. Finite volume techniques are applied to solve the governing conservation equations at the pore-level scale and to determine the effective transport properties as a function of the reaction extent, namely: the convective heat transfer coefficient, permeability, Dupuit-Forchheimer coefficient, tortuosity and residence time distributions. These exhibit strong dependence on the bed morphological properties (e.g. porosity, specific surface area, particle size) and, consequently, vary with time as the reaction progresses.

Copyright © 2010 by ASME

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