On the Application of the Thiele/Zeldovich Analysis to Porous Carbon Combustion

The combustion of porous carbon particles is a complex process which involves both diffusion through the particle's boundary layer and its internal pore structure as well as a heterogeneous chemical reaction governed by adsorption and desorption. To provide a general basis for the solution of t...

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Bibliographic Details
Published in:Energy & fuels 2003-07, Vol.17 (4), p.901-906
Main Authors: Förtsch, Dieter, Essenhigh, Robert H, Schnell, Uwe, Hein, Klaus R. G
Format: Article
Language:English
Subjects:
Applied sciences
Combustion. Flame
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Theoretical studies
Theoretical studies. Data and constants. Metering
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Summary:The combustion of porous carbon particles is a complex process which involves both diffusion through the particle's boundary layer and its internal pore structure as well as a heterogeneous chemical reaction governed by adsorption and desorption. To provide a general basis for the solution of the relevant Thiele/Zeldovich equation of internal diffusion with reaction, we reformulate the two-step Langmuir rate expression in the format of the one-step ñth-order relation. The purpose of this treatment is to obtain tractable expressions, which allow adequate prediction of combustion behavior of coal char in flames, with appropriate accuracy.
ISSN:0887-0624
1520-5029
DOI:10.1021/ef0202081