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Influence of TiO2 additive on vaporization of potassium during straw combustion
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
2009 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 23, no 11, 5367-5374 p.Article in journal (Refereed)
Abstract [en]

In this work, the influence of TiO2 on the vaporization of K during combustion of straw under fixed bed condition was investigated experimentally. Controlled combustion experiments with a varied amount of TiO2 in straw pellets were performed in an 8 kWpellet burner together with sampling of particles (impactor and absolute filter), analysis of the flue gas composition (Fourier transform infrared, FTIR), and chemical analyses of the collected particles and bottom ash (inductively coupled plasma-atomic emission spectroscopy (ICP-AES), scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), and X-ray diffraction (XRD)). The experimental results showed that the vaporization of K from the fuel bed was significantly reduced when TiO2 was used as an additive. The vaporization ofKwas reduced by∼40-50% for an optimal amount of TiO2 additive. The optimal added TiO2 for the straw used in this work corresponds to a Ti/K (wt) ratio between ∼0.6-1.0. If more TiO2 was added to the fuel, the release ofKto the gas phase was not further reduced and unreacted TiO 2 was found in the bottom ash. © 2009 American Chemical Society.

Place, publisher, year, edition, pages
2009. Vol. 23, no 11, 5367-5374 p.
Keyword [sv]
Energiteknik
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:ri:diva-6973DOI: 10.1021/ef900544zScopus ID: 2-s2.0-72449150685OAI: oai:DiVA.org:ri-6973DiVA: diva2:964828
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2017-11-21Bibliographically approved

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