Development of a magnetic Cu-based oxygen carrier for the chemical looping with oxygen uncoupling (CLOU) process

Adánez-Rubio, Iñaki; Bautista, Hector; Izquierdo, M.T.; Gayán, Pilar; Abad, Alberto; Adánez, Juan

doi:10.1016/j.fuproc.2021.106836

Cited by 31 publications

(2 citation statements)

References 46 publications

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“…This is in line with the previously mentioned increase in magnetic susceptibility of samples exposed for longer times and confirms the hypothesis of an increase in the magnetite fraction with time. These observations are in agreement with the results of Adánez-Rubio et al [14] where CuO-based oxygen carriers on (Fe,Mn) 2 O 3 support became more magnetic over time. This was attributed by the authors to the formation of more magnetic spinel [(Fe,Mn) 3 O 4 ] after several oxidation and reduction cycles.…”

Section: Xrd Resultssupporting

confidence: 93%

“…Therefore, the magnetic fraction can subsequently be recycled to the OCAC process, while the rest is deposited as a waste stream. Magnetic separation was suggested by Adánez-Rubio et al [14], for synthetic oxygen carriers using CuO as an active phase and an Fe-Mnoxide as a magnetic support material. The authors were able to show that the magnetic properties of the oxygen carriers are retained over several oxidation and reduction cycles, which enabled their separation from biomass or coal ash [15].…”

Section: Introductionmentioning

confidence: 99%

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Magnetic Properties of Ilmenite Used for Oxygen Carrier Aided Combustion

Faust¹,

Lamarca²,

Schaëfer³

et al. 2022

SSRN Journal

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Section: Xrd Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Magnetic Properties of Ilmenite Used for Oxygen Carrier Aided Combustion

Faust¹,

Lamarca²,

Schaëfer³

et al. 2022

SSRN Journal

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Chemical Looping Combustion (CLC) in FBRs

Duan,

2024

Fluidized Bed Reactors for Carbon Capture

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Experimental demonstration of 80 kWth chemical looping combustion of biogenic feedstock coupled with direct CO2 utilization by exhaust gas methanation

Fleiß

Bartik

Priščák

et al. 2023

Biomass Conv. Bioref.

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Chemical looping combustion is a highly efficient CO2 separation technology without direct contact between combustion air and fuel. A metal oxide is used as an oxygen carrier in dual fluidized beds to generate clean CO2. The use of biomass is the focus of current research because of the possibility of negative CO2 emissions and the utilization of biogenic carbon. The most commonly proposed OC are natural ores and residues, but complete combustion has not yet been achieved. In this work, the direct utilization of CLC exhaust gas for methane synthesis as an alternative route was investigated, where the gas components CO, CH4 and H2 are not disadvantageous but benefit the reactions in a methanation step. The whole process chain, the coupling of an 80 kWth pilot plant with gas cleaning and a 10 kW fluidized bed methanation unit were for this purpose established. As OC, ilmenite enhanced with limestone was used, combusting bark pellets in autothermal operation at over 1000 °C reaching high combustion efficiencies of up to 91.7%. The fuel reactor exhaust gas was mixed with hydrogen in the methanation reactor at 360 °C and converted with a methane yield of up to 97.3%. The study showed especially high carbon utilization efficiencies of 97% compared to competitor technologies. Based on the experimental results, a scale-up concept study showed the high potential of the combination of the technologies concerning the total efficiency and the adaptability to grid injection. Graphical Abstract

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Development of a magnetic Cu-based oxygen carrier for the chemical looping with oxygen uncoupling (CLOU) process

Cited by 31 publications

References 46 publications

Magnetic Properties of Ilmenite Used for Oxygen Carrier Aided Combustion

Magnetic Properties of Ilmenite Used for Oxygen Carrier Aided Combustion

Chemical Looping Combustion (CLC) in FBRs

Experimental demonstration of 80 kWth chemical looping combustion of biogenic feedstock coupled with direct CO2 utilization by exhaust gas methanation

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