Evaluation of a chemical-looping-combustion power-generation system by graphic exergy analysis

Ishida, M.; Zheng, Danxing; Akehata, Takashi

doi:10.1016/0360-5442(87)90119-8

Cited by 494 publications

(314 citation statements)

References 2 publications

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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

109

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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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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

109

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“…1, and utilizes the oxygen present in metal oxides as oxygen carriers circulating between the reactors for fuel combustion (Ishida et al, 1987). In the fuel reactor, combustion between oxygen carriers and carbonaceous fuels yields CO 2 and H 2 O as described by Eq.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Evaluation of Prepared Fe2O3/Al2O3 Oxygen Carriers for Chemical Looping Process

Chiu

et al. 2014

Aerosol Air Qual. Res.

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“…More specifically, this study is focused on the so-called Chemical Looping technology. This technology was first applied to combustion processes with CO 2 capture [13][14][15][16]. Chemical…”

Section: Introductionmentioning

confidence: 99%

Evaluation of different oxygen carriers for biomass tar reforming (I): Carbon deposition in experiments with toluene

Mendiara

Johansen

Utrilla

et al. 2011

Fuel

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Evaluation of a chemical-looping-combustion power-generation system by graphic exergy analysis

Cited by 494 publications

References 2 publications

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

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

Characterization and Evaluation of Prepared Fe2O3/Al2O3 Oxygen Carriers for Chemical Looping Process

Evaluation of different oxygen carriers for biomass tar reforming (I): Carbon deposition in experiments with toluene

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