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

被引:3
作者
Siegmund, Theresa [1 ]
Gollmer, Christian [1 ]
Horstmann, Niklas [1 ]
Kaltschmitt, Martin [1 ]
机构
[1] Hamburg Univ Technol TUHH, Inst Environm Technol & Energy Econ, Eissendorfer Str 40, D-21073 Hamburg, Germany
关键词
Wood Pellets; Combustion; Total Particulate Matter (TPM) Emissions; (Fuel) Additivation; Carbon Monoxide (CO) Emissions; Kaolin; BIOMASS COMBUSTION; HIGH-TEMPERATURE; KAOLIN; ASH; CALCINATION; ATMOSPHERE; MIGRATION; BEHAVIOR;
D O I
10.1016/j.fuproc.2024.108111
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
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.) 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 2 coated muscovite, aluminum hydroxide, and meta-kaolinite.
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页数:11
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