KINETICS OF COAL CHAR COMBUSTION IN OXYGEN-ENRICHED ENVIRONMENT
(0) The influence of oxygen-enriched gaseous atmosphere on coal char combustion was studied. Two different coals, i.e. lignite and bituminous coal, were used as a basic fuel and the reacting gases of oxygen & CO2 were used to simulate flue gas recirculation. Moreover, a broad range of in-furnace conditions, i.e. five temperatures of 873, 973, 1073, 1173, 1273K and five oxygen concentrations of 20, 40, 60, 80, 100％vol., was investigated. Thermogravimetric method of measurement was employed to obtain the processing data on fuel conversion rate under foregoing investigated conditions. For further calculations, simplified Shrinking-Core Model was introduced. Finally, fundamental kinetic parameters, i.e. pre-exponential factor, activation energy and reaction order, were established and then on the basis of their values reaction-controlling regime for coal char combustion in oxygen-enriched environment was predicted. The investigations, financially supported by Polish Government, are a part of Framework Project “Supercritical Coal-fired Power Units.
ozy-combustion coal-char kinetics
T.Czakiert W.Nowak
Department of Heating, Ventilation and Air Protection,Faculty of Environmental Protection and Engine Department of Heating, Ventilation and Air Protection, Faculty of Environmental Protection and Engin
国际会议
第20届国际流化床燃烧会议(20th International Conference on Fluidized Bed Combustion)
西安
英文
618-623
2009-05-18（万方平台首次上网日期，不代表论文的发表时间）