Entrained Flow Reactor Study of K-Capture by Solid Additives

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Abstract

A method to simulate the reaction between gaseous K-species and solid additives, at suspension fired conditions has been developed, using an entrained flow reactor (EFR). A water slurry containing solid additives (kaolin or coal fly ash) and KCl, is injected into the EFR and the solid products are collected from the cyclone and filter. The K-capture reaction is evaluated by determining the fraction of water-insoluble K in the products. The results showed that KCl can effectively be captured by kaolin and coal fly ash, forming water-insoluble K-aluminosilicates. The amount of K, captured per gram of additives, rose when increasing the molar ratio of K/(Al+Si) in the reactants. A change of the reaction temperature, from 1100 °C to 1450 °C, did not significantly influence the extent of the reaction, which is in contradiction to the trend observed in previous fixed-bed reactor studies. The method using the EFR, developed in this study, will be applied for further studies on the reaction of different additives and alkali species.
Original languageEnglish
Title of host publicationProceedings of the 24th European Biomass Conference & Exhibition
Number of pages5
PublisherETA-Florence Renewable Energies
Publication date2016
DOIs
Publication statusPublished - 2016
Event24th European Biomass Conference & Exhibition - Amsterdam, Amsterdam, Netherlands
Duration: 6 Jun 20169 Jun 2016
Conference number: 24
http://www.eubce.com/home.html
http://www.eubce.com/home.html
http://www.eubce.com/home.html

Conference

Conference24th European Biomass Conference & Exhibition
Number24
LocationAmsterdam
CountryNetherlands
CityAmsterdam
Period06/06/201609/06/2016
Internet address
SeriesProceedings of European Biomass Conference and Exhibition
ISSN2282-5819

Keywords

  • Alkali
  • Additives
  • Boiler
  • Combustion
  • Fouling

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