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Scaling heat and mass flow through porous media in the presence of pyrolysis

Maes, Julien and Muggeridge, Ann H. and Jackson, Matthew D. and Quintard, Michel and Lapene, Alexandre Scaling heat and mass flow through porous media in the presence of pyrolysis. (2013) In: 13th UK Heat Transfer Conference, 2 September 2013 - 3 September 2013 (London, United Kingdom).

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Abstract

The modelling of heat and mass flow through porous media in the presence of pyrolysis is complex as various physical and chemical phenomena needs to be represented. In addition to the transport of heat by conduction and convection and the change of properties with varying pressure and temperature, these processes involve transport of mass by convection, evaporation, condensation and pyrolysis chemical reactions. Examples of such process includes pyrolysis of wood, thermal decomposition of polymer composite and in-situ upgrading of heavy oil and oil shale. The behaviour of these systems are complex as relatively small changes in the material composition can significantly change the thermophysical properties. Scaling reduces the number of parameters in the problem statement and quantifies the relative importance of the various dimensional parameters (permeability, thermal conduction, reaction constants...) This paper presents the scaling by Inspectional Analysis (IA) method of a one-dimensional problem where a solid phase decomposes into non-reactive gas. The IA method is based on the underlying physical laws, expressed in the form of partial differential equations and boundary conditions. We find a minimum set of dimension less groups required to describe the problem. The analysis is validated considering the example of thermal decomposition of polymer composite. Then, we study the variability of the heat and mass flow with the scaling groups by performing a sensitivity analysis using experimental design.

Item Type:Conference or Workshop Item (Speech)
Audience (conference):International conference without published proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Total (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Imperial College London (UNITED KINGDOM)
Laboratory name:
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Deposited On:09 Jan 2014 07:07

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