A bituminous coal is burned in (i) pure oxygen or (ii) in air in a boiler furnace under stoichiometric conditions. Coal composition is (in % by mass): C = 81, H = 5, O = 4, ash A = 7, and moisture M...

A bituminous coal is burned in (i) pure oxygen or (ii) in air in a boiler furnace under stoichiometric conditions. Coal composition is (in % by mass): C = 81, H = 5, O = 4, ash A = 7, and moisture M = 3; LHV of coal = 30.8 MJ/ kg. Determine
(a)  the flue gas volume and composition, and
(b) the adiabatic combustion temperature if the sensible heat of air or oxygen and fuel is ignored.
Density: 1.429 kg/m3 for oxygen and 1.293 kg/m3 for air; specific heat of flue gas is cpg = 1.34 kJ/m3K.