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Fluidized bed boilers are often the technology of choice to fire biomass fuels, and circulating fluidized bed boilers (CFB) are most advantageous for large-scale applications, including utility boilers.During the recent years public subsidies supporting renewable fuels increased the opportunities and thus the demand for highly efficient boilers capable to co-fire woody biomass with large shares of...
This paper presents our observations on coating build up, morphology and the elemental composition of bed-material particles collected from a 550MWth CFB boiler burning coal, bark and peat fuel/fuel mixture. The special focus was on the changes of the elemental composition of coating layer on bed-material particles when different fuels were burned. The results were obtained using a scanning electron...
Oxidation of bituminous coal char-nitrogen to NO, N 2 O, and N 2 has been studied by single particle modelling. The single particle model forms an essential part of the CFB NO x /N 2 O emission tendency predictor under development. In a CFB a significant part of nitrogen oxide emissions originate from oxidation of char-nitrogen, and the char inventory in the reactor...
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