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Modelling of non-consolidated oil shale semi-coke forward combustion: influence of carbon and calcium carbonate contents

Fadaei, Hossein and Sennoune, Mohamed and Salvador, Sylvain and Lapene, Alexandre and Debenest, Gérald Modelling of non-consolidated oil shale semi-coke forward combustion: influence of carbon and calcium carbonate contents. (2012) Fuel, 95. 197-205. ISSN 0016-2361

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Official URL: http://www.sciencedirect.com/science/article/pii/S0016236111007800#

Abstract

A one dimensional (1-D) numerical model to describe forward filtration combustion in a porous bed is proposed. The numerical model is based on mass and momentum conservation law (generalized Darcy’s law). We assume local thermal equilibrium between gas and solid phases. The effect of carbon and calcium carbonate content on the propagation of the high temperature combustion front has been investigated. A simple carbon oxidation reaction, producing CO and CO2, describes the combustion. We found that increasing the carbon content of the bed increases the peak temperature. However, the combustion front velocity versus carbon content does not show a monotone behaviour. The front velocity increases while carbon content increases up to a certain value and then decreases. Also, we observed that higher the temperature is, stronger the calcium carbonate decomposition is. Consequently, the calcium carbonate decomposition is closely linked to the peak temperature. Moreover, increasing the calcium carbonate content of the porous bed resulted a decrease of the peak temperature. These results as well as the composition of produced gases are consistent with the previous published experimental study. Results of this paper show that using a 1-D model with a simple reaction scheme for combustion and for calcium carbonate decomposition produces satisfactory results for simulation of filtration combustion process.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Fuel website : http://www.sciencedirect.com/science/article/pii/S0016236111007800#
HAL Id:hal-00963632
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Stanford University (USA)
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Deposited By: Gerald DEBENEST
Deposited On:07 Jan 2014 13:34

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