A new advanced power-generation system using chemical-looping combustion

Ishida, M.; Jin, Hongguang

doi:10.1016/0360-5442(94)90120-1

Cited by 404 publications

(243 citation statements)

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“…Natural gas is one of the primary fuels composed with approximately 90% of methane; hence, methane combustion by chemical looping process is commonly studied for bench scale reactors by previous researchers (Ishida and Jin, 1994;Mattisson et al, 2001;Ryu et al, 2003), and described by reaction (4) with H 2 O and CO 2 to be the effluent components.…”

Section: Fuels For Chemical Looping Processmentioning

confidence: 99%

Chemical Looping Process - A Novel Technology for Inherent CO2 Capture

Chiu

2012

Aerosol Air Qual. Res.

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Chemical looping is a novel energy technology that undertakes inherent CO 2 capture and has better energy efficiency than existing CO 2 capture technologies. Metal oxides (also known as oxygen carriers) are applied for the chemical looping process in place of air to offer oxygen for fuel combustion, thus enhancing CO 2 purity in the effluent stream. This article introduces the major aspects of chemical looping technology, including the oxygen carrier, reactor and fuel. Fe-, Ni-and Cu-based metal oxides were found to be suitable oxygen carriers for the chemical looping process based on the evaluation indexes of oxygen capacity, cost, reactivity, and mechanical strength. The modification of oxygen carriers by supporting materials is the typical research regime for enhancing mechanical strength and reactivity. The reactor systems currently used for the chemical looping process include fluidized and moving bed reactors. Fluidized bed reactors are well developed for gaseous fuel combustion applications, while moving bed reactors operated with a counter-flow mode between the solid fuel and oxygen carriers would enhance combustion efficiency, and reduce the operating solid inventory of oxygen carriers. Gaseous fuels, including natural gas and syngas gasified from coal, could achieve complete fuel conversion and high CO 2 yield for different combinations of oxygen carrier and reactor system. Gasification of solid fuels, including coal, petroleum coke and biomass in the fuel reactor, is a critical step that might reduce overall combustion efficiency. To improve solid fuel combustion and CO 2 yield, modification of the reactor design or operational conditions are necessary for the combustion of solid fuels by a chemical looping process.

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Section: Fuels For Chemical Looping Processmentioning

confidence: 99%

Chemical Looping Process - A Novel Technology for Inherent CO2 Capture

Chiu

2012

Aerosol Air Qual. Res.

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“…Three decades later, in 1983, Ritcher and Knoche [4] presented CLC technology as a suitable process with which to increase the thermal efficiency of a power plant, which was supported by works performed by Ishida et al [5][6][7]. At the beginning of the current century Lyngfelt et al [8] proposed CLC for the capture CO 2 at a low cost.…”

Section: Introductionmentioning

confidence: 99%

Kinetic determination of a highly reactive impregnated Fe2O3/Al2O3 oxygen carrier for use in gas-fueled Chemical Looping Combustion

Cabello

Abad

Garcı́a-Labiano

et al. 2014

Chemical Engineering Journal

114

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The objective of this work was to determine the kinetic parameters for reduction and oxidation reactions of a highly reactive Fe-based oxygen carrier for use in chemical looping combustion (CLC) of gaseous fuels containing CH 4 , CO and/or H 2 , e.g. natural gas, syngas and PSA-off gas. The oxygen carrier was prepared by impregnation of iron on alumina. The effect of both the temperature and gas concentration was analysed in a thermogravimetric analyser (TGA).The grain model with uniform conversion in the particle and reaction in grains following the shrinking core model (SCM) was used for kinetics determination. It was 2 assumed that the reduction reactions were controlled by two different resistances: the reaction rate was controlled by chemical reaction in a first step, whereas the mechanism that controlled the reactions at higher conversion values was diffusion through the product layer around the grains. Furthermore, it was found that the reduction reaction mechanism was based on the interaction of Fe 2 O 3 with Al 2 O 3 in presence of the reacting gases to form FeAl 2 O 4 as the only stable Fe-based phase. The reaction order values found for the reducing gases were 0.25, 0.3 and 0.6 for CH 4 , H 2 and CO, respectively, and the activation energy took values of between 8 kJ mol -1 (for H 2 ) and 66 kJ mol -1 (for CH 4 ). With regard to oxidation kinetics, the reacting model assumed a reaction rate that was only controlled by chemical reaction. Values of 0.9 and 23 kJ mol -1 were found for reaction order and activation energy, respectively.Finally, the solids inventory needed in a CLC system was also estimated by considering kinetic parameters. The total solids inventory in the CLC unit took a minimum value of 150 kg MW -1 for CH 4 combustion, which is a low value when compared to those of other Fe-based materials found in the literature.

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“…A promising different approach that allows for carbon capturing without large energy consumption was first proposed by Ishida and Jin [5], and subsequently patented in USA [6]. Chemical-looping combustion (CLC) is a thermochemical process where fuel oxidation is carried out through an intermediate agent that actuates as oxygen carrier between two separated reactors: i) a fuel reactor, where the oxygen carrier is reduced oxidizing the fuel, and ii) an air reactor, where the oxygen carrier is oxidized in air.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of a dual power-hydrogen production system based on chemical-looping combustion

Álvaro

Montesino

Orgaz

et al. 2017

Energy

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Chemical-looping hydrogen generation (CLHG) is a chemical-looping combustion variant that allows simultaneous production of power and hydrogen. A thermodynamic analysis from the exergy method point of view of an integrated syngas-fueled CLHG cycle is carried out with the aim of contributing to the conceptual understanding and development of CLHG systems. The cycle working point is optimized in a range of conditions. The proposed system shows a very interesting potential for power, hydrogen and process heating coproduction with high efficiency.

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A new advanced power-generation system using chemical-looping combustion

Cited by 404 publications

References 3 publications

Chemical Looping Process - A Novel Technology for Inherent CO2 Capture

Chemical Looping Process - A Novel Technology for Inherent CO2 Capture

Kinetic determination of a highly reactive impregnated Fe2O3/Al2O3 oxygen carrier for use in gas-fueled Chemical Looping Combustion

Thermodynamic analysis of a dual power-hydrogen production system based on chemical-looping combustion

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