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Carbon monoxide (CO) and particulate matter (PM) emissions during the combustion of wood pellets in a small-scale combustion unit – Influence of aluminum-(silicate-)based fuel additivation
Citation Link: https://doi.org/10.15480/882.13182
Publikationstyp
Journal Article
Date Issued
2024-07-31
Sprache
English
TORE-DOI
Journal
Volume
262
Article Number
108111
Citation
Fuel Processing Technology 262: 108111 (2024)
Publisher DOI
Scopus ID
Publisher
Science Direct
Peer Reviewed
true
The additivation of solid biofuels has proven to be an effective method for reducing total particulate matter (TPM) and carbon monoxide (CO) emissions, as well as for reducing ash-related problems related to, e.g., fouling and slagging. During the combustion with additives, potassium (K) released from the solid biofuels is bound into temperature-stable compounds, thus preventing the formation of inorganic (i.e., K-based) TPM. Simultaneously by reducing K in the gas phase, the inhibition of gas-phase oxidation (e.g., CO oxidation) due to interference of K within the existing radical pool is hindered. Particularly kaolin, an aluminum-silicate-based additive has proven effective in reducing not only TPM but also CO emissions. The mitigation effects on CO emissions have previously been reported mostly in a subordinate role and explanations are given in the form of hypotheses. In this study, seven additives (i.e., kaolin, kaolinite, meta-kaolinite, aluminum hydroxide, muscovite, muscovite coated with titanium dioxide and kalsilite, each at 0.3 wt%a.r.) were investigated during wood pellet combustion in a smallscale furnace (7.8 kW). For both CO and TPM emissions, kaolin proved to be most effective (i.e., − 52% CO, − 49% TPM), followed by muscovite, kaolinite, TiO2 coated muscovite, aluminum hydroxide, and meta-kaolinite.
DDC Class
660: Chemistry; Chemical Engineering
Publication version
publishedVersion
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