K-capture by Al-Si based Additives in an Entrained Flow Reactor

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Abstract

A water slurry, consisting of KCl and Al-Si based additives (kaolin and coal fly ash) was fed into an entrained flow reactor (EFR) to study the K-capturing reaction of the additives at suspension-fired conditions. Solid products collected from the reactor were analysed with respect to total and water-soluble K content to quantify the extent of the K-capturing reaction. The results showed that under suspension-fired conditions (1100 °C-1450 °C), kaolin and coal fly ash can effectively capture gaseous KCl. When increasing the mass ratio of KCl to Al-Si additives in the reactants, the conversion of KCl to K-aluminosilicate decreased. When reaction temperature increased from 1100 °C to 1450 °C, the conversion of KCl does not change significantly, which differs from the trend observed in fixed-bed reactor.
Original languageEnglish
Title of host publicationImpacts of Fuel Quality on Power Production
Number of pages7
Publication date2016
Publication statusPublished - 2016
Event26th International Conference on Impacts of Fuel Quality on Power Production - Prague, Czech Republic
Duration: 19 Sep 201623 Sep 2016
Conference number: 26

Conference

Conference26th International Conference on Impacts of Fuel Quality on Power Production
Number26
CountryCzech Republic
CityPrague
Period19/09/201623/09/2016

Keywords

  • K-capture
  • Biomass combustion
  • Kaolin
  • Coal ash

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