Numerical Modeling of Oxygen Carrier Performances (NiO/NiAl 2 O 4 ) for Chemical-Looping Combustion

Lucia Blas, Patrick Dutournié, Mejdi Jeguirim, Ludovic Josien, David Chiche, Stephane Bertholin and Arnold Lambert
Additional contact information
Lucia Blas: LGRE, Laboratoire Gestion des Risques, Environnement 3 bis, rue Alfred Werner, 68093 Mulhouse, France
Patrick Dutournié: IS2M, Institut de Sciences des Matériaux de Mulhouse, UMR 7361 CNRS, Université de Strasbourg, Université de Haute Alsace, 3 bis, rue Alfred Werner, 68098 Mulhouse CEDEX, France
Mejdi Jeguirim: IS2M, Institut de Sciences des Matériaux de Mulhouse, UMR 7361 CNRS, Université de Strasbourg, Université de Haute Alsace, 3 bis, rue Alfred Werner, 68098 Mulhouse CEDEX, France
Ludovic Josien: IS2M, Institut de Sciences des Matériaux de Mulhouse, UMR 7361 CNRS, Université de Strasbourg, Université de Haute Alsace, 3 bis, rue Alfred Werner, 68098 Mulhouse CEDEX, France
David Chiche: IFP Energies Nouvelles, Rond-Point de l’échangeur de Solaize, BP 3, 69360 Solaize, France
Stephane Bertholin: IFP Energies Nouvelles, Rond-Point de l’échangeur de Solaize, BP 3, 69360 Solaize, France
Arnold Lambert: IFP Energies Nouvelles, Rond-Point de l’échangeur de Solaize, BP 3, 69360 Solaize, France

Energies, 2017, vol. 10, issue 7, 1-16

Abstract: This work was devoted to study experimentally and numerically the oxygen carrier (NiO/NiAl 2 O 4 ) performances for Chemical-Looping Combustion applications. Various kinetic models including Shrinking Core, Nucleation Growth and Modified Volumetric models were investigated in a one-dimensional approach to simulate the reactive mass transfer in a fixed bed reactor. The preliminary numerical results indicated that these models are unable to fit well the fuel breakthrough curves. Therefore, the oxygen carrier was characterized after several operations using Scanning Electronic Microscopy (SEM) coupled with equipped with an energy dispersive X-ray spectrometer (EDX). These analyses showed a layer rich in nickel on particle surface. Below this layer, to a depth of about 10 µm, the material was low in nickel, being the consequence of nickel migration. From these observations, two reactive sites were proposed relative to the layer rich in nickel (particle surface) and the bulk material, respectively. Then, a numerical model, taking into account of both reactive sites, was able to fit well fuel breakthrough curves for all the studied operating conditions. The extracted kinetic parameters showed that the fuel oxidation was fully controlled by the reaction and the effect of temperature was not significant in the tested operating conditions range.

Keywords: NiO reactivity; nickel migration; chemical looping combustion; fixed bed reactor; modelling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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