論文

査読有り
2008年6月

Chloride chemical form in various types of fly ash

ENVIRONMENTAL SCIENCE & TECHNOLOGY
  • Fenfen Zhu
  • ,
  • Masaki Takaoka
  • ,
  • Kenji Shiota
  • ,
  • Kazuyuki Oshita
  • ,
  • Yoshinori Kitajima

42
11
開始ページ
3932
終了ページ
3937
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/es7031168
出版者・発行元
AMER CHEMICAL SOC

Chloride content is a critical problem for the reuse of fly ash as a raw material in cement, and the method used by recyclers to reduce the fly ash chloride content depends on the chemical form of the chlorides. However, limited information is available on the quantitative distribution of chlorides and the identity of some chlorides such as Friedel's salt We examined chloride forms and percentages using X-ray absorption near edge structure and X-ray diffraction analyses, as well as corresponding washing experiments. Approximately 15% of the chlorine in raw fly ash was estimated, to be in the form of NaCl, 10% in KCl, 50% in CaCl2, and the remainder in the. form of Friedel's salt Fly ash collected in a bag filter with the injection of calcium hydroxide for acid gas removal (CaFA) contained 35% chlorine as NaCl, 11% as KCl, 37% as CaCl2, 13% as Friedel's salt, and the remaining 4% as CaClOH. In fly ash collected in a bag filter with the injection of sodium bicarbonate for acid gas removal (NaFA), approximately 79% of chlorine was in NaCl, 12% was in KCl, and 9% was in Friedel's salt.

リンク情報
DOI
https://doi.org/10.1021/es7031168
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/18589947
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000256274300009&DestApp=WOS_CPL
ID情報
  • DOI : 10.1021/es7031168
  • ISSN : 0013-936X
  • PubMed ID : 18589947
  • Web of Science ID : WOS:000256274300009

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