Calculation on the Thermodynamics of Air-Steam Gasification of Coal Macerals
The results of thermodynamic calculations on gasification of coal macerals with a vitrinite reflectance of Ro = = 0.73% in an H2O-O2-N2 medium with varying both the ratio between the components and the temperature of the process are reported. It has been shown that in accordance with the basic characteristics of equilibrium gasification (the yield and the heating value of the product gas, its H2 and CH4 contents, and the H2/CO ratio), the macerals are arranged in the order L > Vt > I analogous to their reactivity series. It is concluded that in the case of low-rank coal processing involving density fractionation, the heaviest fractions can be a promising feedstock for the manufacture of fuel gas via the steam gasification process.