Chemical-looping combustion (CLC) for inherent <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si144.gif" display="inline" overflow="scroll"><mml:msub><mml:mrow><mml:mi>CO</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math> separations—a review

Hossain, Mohammad M.; Lasa, Hugo I. de

doi:10.1016/j.ces.2008.05.028

Cited by 871 publications

(232 citation statements)

References 92 publications

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“…Many efforts have been made to develop OCs for CLC. The selection of OC materials has been discussed by Lyngfelt et al [5] and Hossain and de Lasa [6]. The active metal oxides (CuO, Fe 2 2 , etc.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Large‐Scale Production Methods of Fe₂O₃/Al₂O₃ Oxygen Carriers for Chemical‐Looping Combustion

Guo

Zhao

et al. 2014

Chem Eng & Technol

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Oxygen carrier (OC) particles for chemical-looping combustion (CLC) may be produced in large scale by a number of methods such as freeze granulation, spray drying, impregnation, and mechanical mixing methods. To select the most appropriate technology for large-scale preparation, the four preparation methods were adopted to prepare Fe 2 O 3 /Al 2 O 3 OCs and compared with each other in terms of productivity, preparation period, physical and chemical characterization, and reactivity in CLC of lignite. Freeze granulation and spray drying methods were found to be more suitable for large-scale production of OCs for CLC. The results of the comparative studies may provide guidelines for selecting appropriate methods for preparing OCs on industrial scale.

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Section: Introductionmentioning

confidence: 99%

Comparison of Large‐Scale Production Methods of Fe₂O₃/Al₂O₃ Oxygen Carriers for Chemical‐Looping Combustion

Guo

Zhao

et al. 2014

Chem Eng & Technol

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“…Two major model families were used namely unreacted shrinking core and nucleation-growth models [15]. These kinetic models are implemented in heat and mass transfer modelling to develop numerical tools able to simulate the whole process.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Oxygen Carrier Performances (NiO/NiAl2O4) for Chemical-Looping Combustion

Blas¹,

Dutournié

Jeguirim

et al. 2017

Energies

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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.

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“…Current CO 2 capture technologies consist in the CO 2 separation from industrial flue gas streams. This last one can be stored or mineralised 3 . These processes have the major disadvantage of high costs and energy penalties, because of the significant quantities of gas which must be treated.…”

Section: Introductionmentioning

confidence: 99%

Influence of the oxidation step on the behaviour and the performances of an oxygen carrier in fixed bed reactor

Blas

Dorge

Zouaoui³

et al. 2013

Mat. Res.

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Chemical Looping Combustion is a promising technology for clean power generation with integrated CO 2 capture. In this process the oxygen required for combustion is provided by a metal oxide. This work deals with the development of an experimental procedure to study performances of an oxygen carrier during oxidation/reduction cycles and the influence of the oxidation step on its behaviour. Tests were performed in a laboratory fixed bed reactor, with NiO/NiAl 2 O 4, a promising oxygen carrier, and CO as fuel. Two different protocols of oxidation were studied. Results reveal that the oxidation step conditions can change the performances of the oxygen carrier. A significant decrease in total reduction capacity was observed using the regeneration step at high temperature due to structural changes in particles. SEM analysis reveals that particle surface contains different crystallites according to this procedure. With the second procedure (oxidation in temperature ramp), nickel is partially agglomerated.

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Chemical-looping combustion (CLC) for inherent CO2 separations—a review

Cited by 871 publications

References 92 publications

Comparison of Large‐Scale Production Methods of Fe₂O₃/Al₂O₃ Oxygen Carriers for Chemical‐Looping Combustion

Comparison of Large‐Scale Production Methods of Fe₂O₃/Al₂O₃ Oxygen Carriers for Chemical‐Looping Combustion

Numerical Modeling of Oxygen Carrier Performances (NiO/NiAl2O4) for Chemical-Looping Combustion

Influence of the oxidation step on the behaviour and the performances of an oxygen carrier in fixed bed reactor

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Chemical-looping combustion (CLC) for inherent CO2 separations—a review

Cited by 871 publications

References 92 publications

Comparison of Large‐Scale Production Methods of Fe2O3/Al2O3 Oxygen Carriers for Chemical‐Looping Combustion

Comparison of Large‐Scale Production Methods of Fe2O3/Al2O3 Oxygen Carriers for Chemical‐Looping Combustion

Numerical Modeling of Oxygen Carrier Performances (NiO/NiAl2O4) for Chemical-Looping Combustion

Influence of the oxidation step on the behaviour and the performances of an oxygen carrier in fixed bed reactor

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Comparison of Large‐Scale Production Methods of Fe₂O₃/Al₂O₃ Oxygen Carriers for Chemical‐Looping Combustion

Comparison of Large‐Scale Production Methods of Fe₂O₃/Al₂O₃ Oxygen Carriers for Chemical‐Looping Combustion