C–O–H2 ternary diagram for evaluation of carbon activity in CH4-containing gas mixtures

dc.contributor.authorRIBEIRO, T. R.
dc.contributor.authorFERREIRA NETO, J. B.
dc.contributor.authorTAKANO, C.
dc.contributor.authorJoão Guilherme Rocha Poço
dc.contributor.authorKOLBEINSEN, L.
dc.contributor.authorRINGDALEN, E.
dc.contributor.authorOrcidhttps://orcid.org/0000-0001-6764-6947
dc.date.accessioned2022-01-16T18:59:04Z
dc.date.available2022-01-16T18:59:04Z
dc.date.issued2021-05-29
dc.description.abstract© 2021 The AuthorsThe C–O–H2 ternary diagram is presented to characterize the carbon activity in equilibrium with gas mixtures containing CH4, CO, CO2, H2O, and H2 at different temperatures and pressures. The three reactions for carbon deposition from CH4, CO, and CO + H2 are considered jointly, and the combined equilibrium carbon activity is calculated. The lines on the diagram show a set of gas compositions that is in equilibrium with a defined value of carbon activity at a given temperature and pressure. It was possible to verify that carbon activity in equilibrium with the direct reduction process gas of Midrex is 0.15 and of Energiron ZR is 8.5, explaining the higher carbon content in the reduced iron for the latter. In the case of steam reforming of methane and methanol, carbon activity in usual industrial conditions are of 0.35 and 0.73 respectively. Finally steam reforming of ethanol was evaluated and it was shown that carbon deposition is expected at 240 °C but would be avoided at temperatures of 500 °C and higher in equilibrium conditions. The proposed diagram could be useful in many chemical, catalytic, and metallurgical processes for study or prevention of carbon formation.
dc.description.firstpage1576
dc.description.lastpage1585
dc.description.volume13
dc.identifier.citationRIBEIRO, T. R.; FERREIRA NETO, J. B.;TAKANO, C.; POÇO, J. G. R.; KOLBEINSEN, L.; RINGDALEN, E. C–O–H2 ternary diagram for evaluation of carbon activity in CH4-containing gas mixtures. Journal of Materials Research and Technology, v. 13, p. 1576-1585, Mayo, 2021.
dc.identifier.doi10.1016/j.jmrt.2021.05.033
dc.identifier.issn2238-7854
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/4392
dc.relation.ispartofJournal of Materials Research and Technology
dc.rightsAcesso Aberto
dc.rights.licenseCreative Commons "Este é um artigo publicado em acesso aberto sob uma licença Creative commons (CC-BY-NC-ND-4.0). Fonte: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85117685799&origin=inward. Acesso em: 23 agosto 2022.
dc.subject.otherlanguageCarbon activity
dc.subject.otherlanguageCarburization
dc.subject.otherlanguageDirect reduction
dc.subject.otherlanguageEthanol
dc.subject.otherlanguageMethane
dc.subject.otherlanguageMethanol
dc.subject.otherlanguageReforming
dc.subject.otherlanguageTernary diagram
dc.subject.otherlanguageThermodynamics
dc.titleC–O–H2 ternary diagram for evaluation of carbon activity in CH4-containing gas mixtures
dc.typeArtigo
fei.scopus.citations6
fei.scopus.eid2-s2.0-85117685799
fei.scopus.subjectCarbon activities
fei.scopus.subjectCarbon deposition
fei.scopus.subjectCarburization
fei.scopus.subjectCH 4
fei.scopus.subjectDirect Reduction
fei.scopus.subjectGas compositions
fei.scopus.subjectGases mixture
fei.scopus.subjectProcess gas
fei.scopus.subjectTemperature and pressures
fei.scopus.subjectTernary diagrams
fei.scopus.updated2024-05-01
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85117685799&origin=inward
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