Oxidation of ferrochrome slag using CO2: a possible O2 carrier in CLC process

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dc.contributor.author Das, Swagat
dc.contributor.author Biswas, Arijit
dc.contributor.author Ghoroi, Chinmay
dc.contributor.author Konar, Bikram
dc.coverage.spatial United Kingdom
dc.date.accessioned 2022-02-03T08:03:08Z
dc.date.available 2022-02-03T08:03:08Z
dc.date.issued 2022-01
dc.identifier.citation Das, Swagat; Biswas, Arijit; Ghoroi, Chinmay and Konar, Bikram, "Oxidation of ferrochrome slag using CO2: a possible O2 carrier in CLC process", Journal of Sustainable Metallurgy, DOI: 10.1007/s40831-021-00491-8, Jan. 2022. en_US
dc.identifier.issn 2199-3823
dc.identifier.issn 2199-3831
dc.identifier.uri https://doi.org/10.1007/s40831-021-00491-8
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/7485
dc.description.abstract Global warming and other environmental issues due to the increasing CO2 in the atmosphere have raised concerns about reducing CO2 emissions. CO2 sequestration using Chemical looping combustion (CLC) is a technology with inherent greenhouse gas (CO2) separation. This technique involves transferring oxygen from combustion air to fuel without direct interaction using metal oxide as an oxygen carrier. Steel industry waste such as ferrochrome slag consists of transition metal oxides that can be an attractive and inexpensive oxygen carrier for chemical looping combustion. The present work explores the possibility of oxidation of ferrochrome slag, pure Fe turning, and their mixtures using CO2 in the CLC process. TG experiments were performed using ferrochrome slag, pure Fe turning, and their mixture in varying weight ratios (1:1, 1:2, and 2:1) at 800 °C, 900 °C, and 1000 °C (isothermal and dynamic temperature program) in the presence of 40% CO2 and 60% Ar gas mixture. The oxidized samples were investigated using SEM–EDS and XRD to analyze the phases and composition. Furthermore, thermodynamic calculations were performed using FactSage 7.1 software to aid the understanding of the oxidation mechanism. The results show that Slag–Fe mixtures gain significant mass due to Fe3O4 spinel formation. In addition, the oxidized Slag–Fe samples also constitute MgAl2O4 spinel with Fe and Cr solubility. The oxidation kinetics is found to increase with temperature and Fe content in the mixtures. The study effectively demonstrates that CO2 can be utilized for the oxidation of Slag–Fe turning mixtures.
dc.description.statementofresponsibility by Swagat Das, Arijit Biswas, Chinmay Ghoroi and Bikram Konar
dc.language.iso en_US en_US
dc.publisher Springer en_US
dc.subject Chemical looping combustion en_US
dc.subject Ferrochrome slag en_US
dc.subject CO2 sequestration en_US
dc.subject Thermogravimetric analysis en_US
dc.subject CO2 capture en_US
dc.subject Fe turning en_US
dc.title Oxidation of ferrochrome slag using CO2: a possible O2 carrier in CLC process en_US
dc.type Article en_US
dc.relation.journal Journal of Sustainable Metallurgy

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