Abstract：The gasification performances of different solid fuels calculated based on Gibbs free energy minimization principle were investigated using oxygen as gasifier to explore the solid fuels gasification law. The required equivalence oxygen ratio, equilibrium temperature, contents of syngas and gasifier energy efficiency were studied when the solid fuel (the molar ratio of hydrogen to carbon (H/C) ranged in 0−1.6, the molar ratio of oxygen to carbon (O/C) ranged in 0.1−0.8) was completely gasified by oxygen in entrained flow bed. The simulation results showed that the concentration of H2 and CO were independent from O/C ratio of fuels and the concentration of H2O and CO2 were low for low O/C ratio of fuels with constant H/C ratio in solid fuels. And for high O/C ratio of fuels with constant H/C ratio in solid fuels, the required equivalence oxygen ratio decreased sharply, the equilibrium temperature decreased to 700 ℃ (at O/C > 0.6), and the gasifier energy efficiency tended to decrease, correspondingly with the decrease in H2 and CO and increase in CO2 and H2O. When the O/C ratio in solid fuels was constant, with the increase of H/C ratio of fuel, the equilibrium temperature dropped in a fast speed (at O/C < 0.6), similarly, the gasifier energy efficiency and CO content tended to decrease, whereas, the H2, CO2 and H2O concentrations increased.
Zhu Lin,Fan Junming. Simulation of Solid Fuel-Oxygen Gasification Based on Gibbs Free Energy Minimization Principle[J]. 化学反应工程与工艺, 2014, 30(4): 303-309.
