Reactive additives for alkali capture in biomass combustion

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Abstract

Biomass, as a renewable and CO2 neutral fuel, is combusted in fluidized bed, grate and pulverized fuel-fired boilers for heat and power production. The gaseous alkali species released from biomass combustion, such as KCl and KOH, can cause several operation problems in the boilers, including ash deposition, corrosion, bed agglomeration, and deactivation of SCR catalysts. To address these problems, reactive additives that can convert the harmful gaseous alkali species to less harmful species, have been studied extensively through experiments and modelling. This paper aims to provide a discussion of the current understanding and applications of reactive additives for alkali capture in biomass combustion. The focus is on the thermodynamics, reaction mechanism, kinetics, and application aspects of sulfur based additives and Al-Si based additives.
Original languageEnglish
Publication date2018
Number of pages17
Publication statusPublished - 2018
Event27th International Conference on the Impact of Fuel Quality on Power Production and the Environment - Lake Louise, Canada
Duration: 24 Sep 201828 Sep 2018

Conference

Conference27th International Conference on the Impact of Fuel Quality on Power Production and the Environment
CountryCanada
CityLake Louise
Period24/09/201828/09/2018

Cite this

Wu, H., Wang, G., Jensen, P. A., Jappe Frandsen, F., & Glarborg, P. (2018). Reactive additives for alkali capture in biomass combustion. Paper presented at 27th International Conference on the Impact of Fuel Quality on Power Production and the Environment, Lake Louise, Canada.