Detail publikace

Influence of ammonia content in SNCR fly ash on phase composition and morphology of autoclaved aerated concrete (AAC)

GALVÁNKOVÁ, L. LÉDL, M. OPRAVIL, T. BERANOVÁ, D. TKACZ, J.

Originální název

Influence of ammonia content in SNCR fly ash on phase composition and morphology of autoclaved aerated concrete (AAC)

Anglický název

Influence of ammonia content in SNCR fly ash on phase composition and morphology of autoclaved aerated concrete (AAC)

Jazyk

en

Originální abstrakt

In production of AAC the fly ash was used as a source of SiO2 for many years. Now, after introducing a selective non-catalytic reduction (SNCR) technology to coal combustion process, the fly ash contain ammonia in a form of soluble salts, such as NH4HSO4 and (NH4)2SO4, which causes problems during manufacturing the AAC. Among all the influence of ammonia ions to the phase composition of the final product was not fully described. The main aim of this contribution is to describe the influence of ammonia to phase composition and morphology of autoclaved aerated concrete (AAC). For preparing AAC in laboratory conditions, the fly ash with various content of ammonia was used. The amount of ammonia before and after the hydrothermal reaction was measured by VIS spectrofotometry. The phase composition of prepared samples was determined by means of X-ray diffractometry and confirmed by TG-DTA analysis. The influence of the ammonia to the morphology of final products was studied by scanning electron microscopy.

Anglický abstrakt

In production of AAC the fly ash was used as a source of SiO2 for many years. Now, after introducing a selective non-catalytic reduction (SNCR) technology to coal combustion process, the fly ash contain ammonia in a form of soluble salts, such as NH4HSO4 and (NH4)2SO4, which causes problems during manufacturing the AAC. Among all the influence of ammonia ions to the phase composition of the final product was not fully described. The main aim of this contribution is to describe the influence of ammonia to phase composition and morphology of autoclaved aerated concrete (AAC). For preparing AAC in laboratory conditions, the fly ash with various content of ammonia was used. The amount of ammonia before and after the hydrothermal reaction was measured by VIS spectrofotometry. The phase composition of prepared samples was determined by means of X-ray diffractometry and confirmed by TG-DTA analysis. The influence of the ammonia to the morphology of final products was studied by scanning electron microscopy.

Dokumenty

BibTex


@inproceedings{BUT144920,
  author="Lucie {Dlabajová} and Matěj {Lédl} and Tomáš {Opravil} and Denisa {Beranová} and Jakub {Tkacz}",
  title="Influence of ammonia content in SNCR fly ash on phase composition and morphology of autoclaved aerated concrete (AAC)",
  annote="In production of AAC the fly ash was used as a source of SiO2 for many years. Now, after introducing a selective non-catalytic reduction (SNCR) technology to coal combustion process, the fly ash contain ammonia in a form of soluble salts, such as NH4HSO4 and (NH4)2SO4, which causes problems during manufacturing the AAC. Among all the influence of ammonia ions to the phase composition of the final product was not fully described. The main aim of this contribution is to describe the influence of ammonia to phase composition and morphology of autoclaved aerated concrete (AAC). For preparing AAC in laboratory conditions, the fly ash with various content of ammonia was used. The amount of ammonia before and after the hydrothermal reaction was measured by VIS spectrofotometry. The phase composition of prepared samples was determined by means of X-ray diffractometry and confirmed by TG-DTA analysis. The influence of the ammonia to the morphology of final products was studied by scanning electron microscopy.",
  address="Trans Tech Publications",
  booktitle="Binders, Materials and Technologies in Modern Construction IV",
  chapter="144920",
  doi="10.4028/www.scientific.net/SSP.276.167",
  howpublished="online",
  institution="Trans Tech Publications",
  year="2018",
  month="june",
  pages="167--172",
  publisher="Trans Tech Publications",
  type="conference paper"
}