Investigation of the K-Mg-Ca sulfate system as part of monitoring problematic phase formations in renewable-energy power plants

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorTesfaye, Fisehaen_US
dc.contributor.authorLindberg, Danielen_US
dc.contributor.authorMoroz, Mykolaen_US
dc.contributor.authorHupa, Leenaen_US
dc.contributor.departmentDepartment of Chemical and Metallurgical Engineeringen
dc.contributor.groupauthorMetallurgical Thermodynamics and Modellingen
dc.contributor.organizationÅbo Akademi Universityen_US
dc.contributor.organizationNational University of Water and Environmental Engineeringen_US
dc.date.accessioned2020-11-06T11:38:24Z
dc.date.available2020-11-06T11:38:24Z
dc.date.issued2020-10-15en_US
dc.description.abstractBesides the widely applied hydropower, wind farms and solar energy, biomass and municipal and industrial waste are increasingly becoming important sources of renewable energy. Nevertheless, fouling, slagging and corrosion associated with the combustion processes of these renewable sources are costly and threaten the long-term operation of power plants. During a high-temperature biomass combustion, alkali metals in the biomass fuel and the ash fusion behavior are the two major contributors to slagging. Ash deposits on superheater tubes that reduce thermal efficiency are often composed of complex combinations of sulfates and chlorides of Ca, Mg, Na, and K. However, thermodynamic databases involving all the sulfates and chlorides that would favor a better understanding and control of the problems in combustion processes related to fouling, slagging and corrosion are not complete. In the present work, thermodynamic properties including solubility limits of some phases and phase mixtures in the K2SO4-(Mg,Ca)SO4 system were reviewed and experimentally investigated. Based on the new and revised thermochemical data, binary phase diagrams of the K2SO4-CaSO4 and K2SO4-MgSO4 systems above 400 °C, which are of interest in the combustion processes of renewable-energy power plants, were optimized.en
dc.description.versionPeer revieweden
dc.format.extent12
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationTesfaye, F, Lindberg, D, Moroz, M & Hupa, L 2020, ' Investigation of the K-Mg-Ca sulfate system as part of monitoring problematic phase formations in renewable-energy power plants ', Energies, vol. 13, no. 20, 5366 . https://doi.org/10.3390/en13205366en
dc.identifier.doi10.3390/en13205366en_US
dc.identifier.issn1996-1073
dc.identifier.otherPURE UUID: 5849e474-b373-4db0-b68a-71fbd4cd1563en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/5849e474-b373-4db0-b68a-71fbd4cd1563en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85093365473&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/52588405/energies_13_05366_v2.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/47444
dc.identifier.urnURN:NBN:fi:aalto-202011066336
dc.language.isoenen
dc.publisherMDPI AG
dc.relation.ispartofseriesEnergiesen
dc.relation.ispartofseriesVolume 13, issue 20en
dc.rightsopenAccessen
dc.subject.keywordHigh-temperature processesen_US
dc.subject.keywordSlagging and fouling managementen_US
dc.subject.keywordSulfatesen_US
dc.subject.keywordSuperheater tubesen_US
dc.subject.keywordThermodynamic modelingen_US
dc.titleInvestigation of the K-Mg-Ca sulfate system as part of monitoring problematic phase formations in renewable-energy power plantsen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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