Attrition of ilmenite ore during consecutive redox cycles in chemical looping combustion

Hatanaka, Takeshi; Yoda, Yukihiro

doi:10.1016/j.powtec.2019.09.028

Cited by 16 publications

(6 citation statements)

References 45 publications

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“…We note that the above discussions are intended to cover the key strategies and the underlying principles for the design of CLBC redox catalysts and reaction schemes. From a practical standpoint, the redox catalyst's activity, available oxygen storage capacity, stability, mechanical strength, 152,153 heat management, 154 cost and environmental risk should all be taken into account to optimize the redox catalyst. The higher margin in the chemical industry over the utility industry can afford significantly higher redox catalyst cost in CLBC.…”

Section: View Article Onlinementioning

confidence: 99%

Chemical looping beyond combustion – a perspective

Zhu

Imtiaz

Donat

et al. 2020

Energy Environ. Sci.

390

179

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Section: View Article Onlinementioning

confidence: 99%

Chemical looping beyond combustion – a perspective

Zhu

Imtiaz

Donat

et al. 2020

Energy Environ. Sci.

390

179

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show abstract

“…The ilmenite, imported from the Titania AS ilmenite ore mine on Norway's southwest coast, was used as an OC in experimental and model studies. This natural mineral consists primarily of FeTiO3 (FeO•TiO2), but the active phase is an iron oxide that belongs to the iG-CLC process, meaning that it releases oxygen in the FR only after direct contact with the fuel [16][17][18][19]. OCs are usually metals or metal oxides characterized with specific properties such as high mechanical resistance, high oxygen transfer capacity, adequate specific heat capacity, and low production costs.…”

Section: Methodsmentioning

confidence: 99%

Modeling of the Chemical Looping Combustion of Hard Coal and Biomass Using Ilmenite as the Oxygen Carrier

et al. 2020

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This paper presents a 1.5D model of a fluidized bed chemical looping combustion (CLC) built with the use of a comprehensive simulator of fluidized and moving bed equipment (CeSFaMB) simulator. The model is capable of calculating the effect of gas velocity in the fuel reactor on the hydrodynamics of the fluidized bed and the kinetics of the CLC process. Mass of solids in reactors, solid circulating rates, particle residence time, and the number of particle cycles in the air and fuel reactor are considered within the study. Moreover, the presented model calculates essential emissions such as CO2, SOX, NOX, and O2. The model was successfully validated on experimental tests that were carried out on the Fluidized-Bed Chemical-Looping-Combustion of Solid-Fuels unit located at the Institute of Advanced Energy Technologies, Czestochowa University of Technology, Poland. The model’s validation showed that the maximum relative errors between simulations and experiment results do not exceed 10%. The CeSFaMB model is an optimum compromise among simulation accuracy, computational resources, and processing time.

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“…Natural ores, such the ilmenite ore used in this work, have a very low cost, though they typically have lower reaction rates, especially when reacting with natural gas [27,36]. A lifetime of 1000 h is considered more likely for ilmenite ore since it has a higher attrition rate [37], while synthetic oxygen carriers can be expected to last up to 10,000 h [38][39][40]. The costs increase substantially when considering synthetic oxygen carriers containing copper or nickel oxides.…”

Section: Parametric Analysismentioning

confidence: 99%

Pressurized Chemical Looping for Direct Reduced Iron Production: Economics of Carbon Neutral Process Configurations

Bond,

Symonds,

Hughes

2024

Energies

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The replacement of the blast furnace—basic oxygen furnace (BF-BOF) steelmaking route with the direct reduced iron—electric arc furnace (DRI-EAF) route reduces the direct CO2 emissions from steelmaking by up to 68%; however, the DRI shaft furnace is one of the largest remaining point source emitters in steelmaking. The capital and operating expenses of two potential nearly carbon-neutral DRI process configurations were investigated as a modification to a standard Midrex DRI facility. First, amine-based post-combustion capture with a 95% capture rate was considered as the benchmark, as it is currently commercially available. A second, novel configuration integrated the Midrex process with pressurized chemical looping—direct reduced iron (PCL-DRI) production. The capital expenditures were 71% and 28% higher than the standard Midrex process for a Midrex + amine capture plant, and a PCL-DRI plant, respectively. There was an incremental variable operating cost of USD 103 and USD 44 per tonne of CO2 for DRI production using amine capture and PCL-DRI, respectively. The amine capture configuration is most sensitive to the cost of steam generation, while PCL-DRI is more sensitive to the cost of electricity and the makeup oxygen carrier. An iron-based natural ore is recommended for PCL-DRI due to the low cost and availability. Based on the lower costs compared to amine-based post-combustion capture, PCL-DRI is an attractive means of eliminating CO2 emissions from DRI production.

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Attrition of ilmenite ore during consecutive redox cycles in chemical looping combustion

Cited by 16 publications

References 45 publications

Chemical looping beyond combustion – a perspective

Chemical looping beyond combustion – a perspective

Modeling of the Chemical Looping Combustion of Hard Coal and Biomass Using Ilmenite as the Oxygen Carrier

Pressurized Chemical Looping for Direct Reduced Iron Production: Economics of Carbon Neutral Process Configurations

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