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There is need to increase efficiency of electricity production in grate combustion (GC). This will lead, however, to higher steam temperatures and make superheaters more susceptible to corrosion. Corn stover (CS) is one of the most abundant agro-biomass residues available to energy production on a global scale and GC power plants are best suited to its combustion. The focus in this study was the quality...
Firing or co-firing of biomass in efficient power plants can lead to high-temperature corrosion of superheaters due to condensation of alkali chlorides into superheater deposits. Corrosion can be prevented if a significant portion of the alkali chlorides present in the flue gases is destroyed before reaching the superheaters. The alkali capturing power of aluminium and ferric sulphates was determined...
Costs of biofuel production from energy crops can be reduced by applying the crop residues in heat and power production. Perennial herbaceous crops like Cynara cardunculus L. are challenging fuels because they tend to have high ash and chlorine contents. Coals, however, are often rich in aluminium silicates and sulphur, and co-firing of these biofuels with coal could be expected to reduce operational...
Combustion of refuse-derived fuel (RDF) alone or together with other biomass leads to superheater fouling and corrosion in efficient power plants (with high steam values) due to vaporization and condensation of alkali chlorides. In this study, means were found to raise the portion of RDF to 40% enb without risk to boilers. This was done by co-firing RDF with coal and optimizing coal quality. Free...
An instrument based on Plasma Excited Atomic Resonance Line Spectroscopy (PEARLS) was applied to measurements of vapor and aerosol phase Na and K in atmospheric combustion conditions. The PEARLS method is based on dissociation of alkali compounds by a direct current plasma torch and subsequent determination of alkali concentration by atomic absorption spectroscopy. The measurements were carried out...
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