Stabilization of the ammonia in SNCR fly ash - the influence of tannins presence on the preparation of an autoclaved aerated concrete

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dc.contributor.authorDlabajová, Luciecs
dc.contributor.authorLédl, Matějcs
dc.contributor.authorBeranová, Denisacs
dc.contributor.authorOpravil, Tomášcs
dc.coverage.issue1cs
dc.coverage.volume583cs
dc.date.accessioned2019-09-30T22:55:44Z
dc.date.available2019-09-30T22:55:44Z
dc.date.issued2019-08-14cs
dc.description.abstractThanks to the legislative regulations on NOx emissions, a selective non-catalytic reduction (SNCR) technology had been introduced to a coal combustion process in power plants. The valuable by-product, fly ash, contains ammonia in the form of soluble salts, e.g. NH4HSO4 and (NH4)2SO4. After mixing SNCR fly ash with cement, thanks to the rise of pH, the toxic ammonia releases and contaminates the working area, so the presence of these salts is undesirable in an autoclaved aerated concrete (AAC) manufacturing process. A possible solution is the conversion of soluble ammonium salts to an insoluble form. Tannins are a class of polyphenolic biomolecules, which react with the ammonium ions to form insoluble compounds. The AAC samples were mixed using SNCR fly ash and two different ammonium binding additives - pure tannic acid and the cost-effective animal food supplement containing chestnut tannins. The influence of additives on the hydration process of the starting mixture was studied by isoperibolic calorimetry. The results suggest that the cost-effective source of tannins retards the hydration. The presence of insoluble compounds was studied by the infrared spectroscopy.en
dc.formattextcs
dc.format.extent1-8cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationIOP Conference Series: Materials Science and Engineering. 2019, vol. 583, issue 1, p. 1-8.en
dc.identifier.doi10.1088/1757-899X/583/1/012020cs
dc.identifier.issn1757-8981cs
dc.identifier.other155527cs
dc.identifier.urihttp://hdl.handle.net/11012/180693
dc.language.isoencs
dc.publisherIOP Publishingcs
dc.relation.ispartofIOP Conference Series: Materials Science and Engineeringcs
dc.relation.urihttps://iopscience.iop.org/article/10.1088/1757-899X/583/1/012020cs
dc.rightsCreative Commons Attribution 3.0 Unportedcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1757-8981/cs
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/cs
dc.subjectSNCRen
dc.subjectfly ashen
dc.subjecttanninsen
dc.titleStabilization of the ammonia in SNCR fly ash - the influence of tannins presence on the preparation of an autoclaved aerated concreteen
dc.type.driverconferenceObjecten
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-155527en
sync.item.dbtypeVAVen
sync.item.insts2020.04.27 16:57:28en
sync.item.modts2020.04.27 16:15:27en
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. Ústav chemie materiálůcs
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav technologie stavebních hmot a dílcůcs
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