![]() ![]() Extensive comparisons between the model predictions and more » experimental results are presented. The model predicts carbon conversion efficiency and product gas composition gasification parameters, such as cold and hot gas efficiency and product gas heating value, are calculated for fuel-rich conditions. ![]() Kinetic treatments of coal pyrolysis, char oxidation, and carbon monoxide oxidation are included. ![]() Fluid mechanics are modeled by a particle force balance and a series combination of a perfectly stirred reactor and a plug flow reactor. Fuel-rich gasification without steam addition is also considered through a gas-phase equilibrium treatment. This paper describes a macroscopic, isothermal model for pulverized coal combustion in a cyclone reactor. Good agreement exists between experiment and theory for conditions of this investigation. The model predicts carbon efficiency, gas composition and temperature and reactor heat loss gasification parameters, such as cold and hot gas efficiency and make gas heating value, are calculated for fuel-rich conditions. Gas composition and temperature are checked against equilibrium values. Kinetic treatments of coal pyrolysis, char oxidation and carbon monoxide oxidation are included. Fuel-rich gasification can also be modeled through a gas-phase equilibrium treatment. A macroscopic model of coal combustion in the cyclone has been developed. The corresponding product gas heating value was 70 BTU/scf. The best gasification results were achieved at an equivalence ratio of 2.0, where the carbon, cold gas and hot gas efficiencies more » were 83, 45 and 75%, respectively. Typical carbon efficiencies were 95% for air-rich and stoichiometric tests and 80% for gasification tests. 67 to 2.4 and air flowrates from 60 to 220 lb/hr. Reactor stability was excellent over a range of equivalence ratios from. Experimental results include several series of coal combustion tests and a coal gasification test carried out via fuel-rich combustion without steam addition. A unified experimental and analytical study of pulverized coal combustion and low-BTU gasification in an atmospheric cyclone reactor was performed. ![]()
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