Change search
ReferencesLink to record
Permanent link

Direct link
Measures to reduce chlorine in deposits: Application in a large-scale circulating fluidised bed boiler firing biomass
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics, Energy Technology and Thermal Process Chemistry.
2011 (English)In: Fuel, ISSN 0016-2361, Vol. 90, no 4, 1325-1334 p.Article in journal (Refereed) Published
Abstract [en]

Combustion of biomass with a high content of alkali (mainly potassium, K) and chlorine (Cl) can result in operational problems including deposit formation and superheater corrosion. Among the measures applied to decrease such problems are co-combustion and the use of additives. The positive effects of these measures are to a large extent either sulphation of the alkali chlorides (KCl) to less corrosive alkali sulphates or capture of alkali from KCl during release of HCl. A test campaign was carried out in a large-scale circulating fluidised boiler fired with biomass where the measures applied were sulphation by ammonium sulphate and co-combustion with peat. Their performance was evaluated by means of several advanced measurement tools including: IACM (on-line measurements of gaseous KCl); a low-pressure impactor (size distribution and chemical composition of extracted fly ash particles) and deposit measurements (chemical composition in collected deposits). The overall performance was better for ammonium sulphate, which significantly lowered KCl in the flue gas. Meanwhile no chlorine was found in the deposits. Only a minor reduction of gaseous KCl was obtained during co-combustion with peat although the chlorinecontent in the deposits was greatly reduced. These findings were supported by the results from the impactor measurements.

Place, publisher, year, edition, pages
Amsterdam: Elsevier , 2011. Vol. 90, no 4, 1325-1334 p.
Keyword [en]
Combustion of biomass, Chlorine in deposits, Ammonium sulphate, In-situ Alkali Chloride Monitor (IACM), Peat
National Category
Other Chemical Engineering
URN: urn:nbn:se:umu:diva-48423DOI: 10.1016/j.fuel.2010.12.005OAI: diva2:450195
Available from: 2011-10-19 Created: 2011-10-19 Last updated: 2012-03-07Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Broström, Markus
By organisation
Energy Technology and Thermal Process Chemistry
In the same journal
Other Chemical Engineering

Search outside of DiVA

GoogleGoogle ScholarTotal: 1 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 89 hits
ReferencesLink to record
Permanent link

Direct link