BASIS OF COMBUSTION ANALYSIS
In a complete combustion reaction, a compound reacts with an oxidizing element, and the products are compounds of each element in the fuel with the oxidizing element.
- AS RECEIVED
Ultimate C H O N S A M =100
Proximate VM FC M A = 100
- AIR DRY [100C/(100-Ma)]
- DRY ASH FREE [100C/(100-M-A)]
- HIGHER HEATING VALUE (GROSS)
- LOWER HEATING VALUE (NET)
LHV = HHV –LH of steam (9H/100 M/100)
- Combustion C O2= CO2 32,790kJ/kg of carbon,
Heat of formation at 25C is 393.7 kJ/mol [Perry p-2-188]
mCnHm (n m/4)O2= nCO2 m/2 H2O Q
S O2= SO2 9260kJ/kg of sulfur
- Calcination CaCO3= CaO CO2–1830kJ/kg of CaCO3gCO3= MgO CO2–1183kJ/kg of MgCO3.
- CaO SO2 1/2 O2 = CaSO4 15141kJ/kg S.
C O2= CO2 q
- 1 kmol of carbon combines with 1 kmol of oxygen to produce 1 kmol of carbon dioxide and release q amount of heat.
- 1 kmol of reactant = Mkg of the reactantwhen Mis the molecular weight of the reactant. So mass of one kmol of oxygen (O2) is 2x16 = 32 kg
- 1 kmol of a gas occupies 22.4 nm3 at 00C 1 atm