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National Repository of Grey Literature 4 records found  Search took 0.01 seconds. 
Release and Partition of Selected Alkali Metals and Heavy Metals in Pressurized Substoichiometric Combustion of Coals
 Čermák, Jiří ; Svoboda, Karel ; Pohořelý, Michael
In our contribution the comparison of pressurized bed substoichiometric combustion of three various kinds of subbituminous coal is presented.
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Theoretical Dependence of Temperature of Burning Coal and Wood Particles on Conditions of Fluidized bed combustion
 Svoboda, Karel
The report brings presentation and solution of two theoretical models for estimation of temperature of burning particles of low-ash coals (smaller particles) and high ash coals with particles above 1 mm in fluidized bed combustion. The attention is focused mainly on effects of fluidized bed temperature, operating pressure and size of particles on difference between fluidized bed (bulk) and burning particle temperature.
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TG-analysis, combustion and gasification of three various coals in a fluidized bed - I.Atmospheric conditions
 Svoboda, Karel ; Čermák, Jiří ; Hartman, Miloslav
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Modeling of Transformation of Coal-N to Nitrogen Oxides in Fluidized Bed Combustion
 Svoboda, Karel ; Pohořelý, Michael
The report contains an overview of transformation phenomena and reactions for coal nitrogen leading to nitrogen oxides emissions. Initial nitrogen in volatile matter from coals is considered in three forms: NH3, HCN and N2. The precursors (NH3 and HCN) are oxidized primarily to NO and N2O and further they react with carbon, CO and NH3. The nitrogen from coal-char is directly oxidized to NO ane N2O,which can be reduced by carbon and CO. An attempt has been made to quantitatively characterize effect of coal properties and combustion conditions on nitrogen oxides emissions.
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