Original scientific paper
Published in: Holistic Approach Environ. 5(2015) 2, pp. 49 – 55
Paper reference number: HAE-93
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Jozef Jandačka*, Michal Holubčik*, Milan Malcho*

* Faculty of Mechanical Engineering, Czech Technical University in Prague, Czech Republic



Dendromass remains the largest biomass energy source today. Dendromass has a lot of advantages in comparison with fossil fuels. One important benefit is reduced SO2 and NOx formation through a decrease in fuel bound sulfur and nitrogen respectively. One of applications of dendromass are wood pellets. Using of additives can affect some properties of wood pellets include combustion and production of emissions. In this work were produced wood pellets with additives (kaolin, talc, lime, limestone, dolomite) in 2 % amount in comparison with pellets which are free of additive (reference sample). The effect of various additives to formation of emissions was observed. Experimental measurements have been performed in domestic boiler for combustion of wood pellets with rated power 18 kW. During the measurements were recorded concentrations of following emissions: CO, SO2, NOx, OGC and particulate matters (PM) in the flue gas. The lowest concentrations of CO were recorded in the sample with 2 % of kaolin in comparison with reference sample. The highest concentrations of carbon monoxide have been reported in sample with addition of lime. The results of SO2, NOx and OGC production indicate negligible difference, when comparing the reference sample to samples with additives. The highest amount of particulate matter was observed in measurements of lime and limestone. The sample with dolomite has lower concentration of total particulate matter in comparison to reference sample. The results of measurements indicate that the type of additive has a considerable effect on the combustion process and formation of emissions.

Keywords: additive, emissions, biomass, wood pellets