Coal GasificationThe chemical reaction for coal gasification is
H2O + C → CO + H2, ΔH = +131 kJ
CO + H2O → CO2 + H2, ΔH = -41 k
Coal GasificationThe chemical reaction for coal gasification is
H2O + C → CO + H2, ΔH = +131 kJ
CO + H2O → CO2 + H2, ΔH = -41 kJ
So overall we turn 1 mole of Carbon into 2 moles of diatomic Hydrogen and 1 mole of Carbon Dioxide for an ideal energy input of 90 kJ.
Thus the ideal energy input is 47 kJ/mol of H2 = 22.32 MJ/kg of H2. The ratio of Hydrogen to Carbon by mass is 1 kg:5.96 kg.
Burning CarbonCarbon is burned to Carbon Monoxide and then Carbon Dioxide:
2C + O2 → 2CO, ΔH = - 221 kJ
2CO + O2 → 2CO2, ΔH = -566 kJ
Therefore pure carbon yields 393.5 kJ/mol = 32.76 MJ/kg
In contrast, coal is not n