Possibilities of ammonium ions fixation into mixed binders

International Conference Building Materials, Products and Technologies

材料科学;工业技术（总论）

Hajzler, J.^1 ; Novotny, R.^1 ; Opravil, T.^1 ; Ptacek, P.^1

Brno University of Technology, Faculty of Chemistry, Purkyova 464/118, Brno

61200, Czech Republic^1

关键词: Ammonium ions;    Cobalt complexes;    High temperature;    Influence on the environments;    Leachability;    Selective non-catalytic reduction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/583/1/012001/pdf
DOI  :  10.1088/1757-899X/583/1/012001

来源: IOP

【 摘 要 】

The purpose of this study is to analyze the usability of ammonium ions fixation in mixed binders with the addition of high temperature fly ash. The experiment used higherature fly ash from operations in which the secondary flue gas denitrification methods have been implemented, specifically by the method of the selective non-catalytic reduction, known as DeNOx. The fixation of ammonium ions was performed by the addition of sodium hexanitrocobaltate(III). The study examines the influence of addition of cobalt(III) complex compound on the release of ammonia into the environment during the mixing the mixed binder. The released ammonia was quantitatively captured into the acid and subsequently titrated. The effect of cobalt(III) complex compound on the rate of hydration and mechanical properties of the mixed binders was also studied. The influence on the environment in terms of leachability was observed.