Abstract
A portable, simplified and in-situ method based on optical emission spectroscopy to quantify the alkali metal emissions and its speciation from the combustion of biomass is presented. The quantification relates the ratio of the relative number densities of alkali metals in the ground state with the ratio of alkali metal oxides in the ash samples. The comparison of the ratios tentatively reveals the speciation of the alkali metals, namely, sodium and potassium in the ash. The results show that the method is able to provide a better understanding of the reaction pathways for the alkali metals that could take place in a furnace.
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