calculation of caloric value and other characteristic data of fuel gas

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Calculation of Caloric Value and other Characteristic Data of Fuel Gas

Plant Note Book Series: PNBS-0601

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Calculation of Caloric Value and other Characteristic Data of Fuel Gas

The table below is used to calculate the following data for the fuel gas based on its composition given in molar fractions xi: • Molar mass:

∑= i iiMxM • Lower and upper caloric value (LHV and HHV):

∑= i iiLHVxLHV , ∑= i iiHHVxHHV • Specific production of reaction products carbon dioxide (CO2) and water

(H2O) in stoichiometric combustion On the right hand side the composition of the combustion air is defined. Input is in the grey fields only. A sample composition is entered for illustration.



The table below is used to calculate • composition and quantity of the combustion air • composition and quantity of the flue gas for fuel gas and combustion air are as defined in the above table. Both calculations are carried out for • stoichiometric combustion (no excess air) • combustion with excess air as defined by the air ratio λ > 1. This calculation is used especially for the determination of the flue gas quantity varying with the oxygen content:



Conversion Factors

1 kmol = 22.415 Nm3 (0 °C, 1.013 bar abs.) 1 Nm3 = 37.216 scft 1 BTU = 1.05506 kJ 1 mmBTU = 1.05506 GJ 1 bar = 1.02 kg/cm2 1 kcal = 4.1868 kJ

calculation of caloric value and other characteristic data of fuel gas

Technology

situ exsitu sulfiding

molar mass

calculation of caloric

upper caloric value

following data

particular purpose

sample composition

stoichiometric combustion