Calculation of Caloric Value and other Characteristic Data of Fuel Gas Plant Note Book Series: PNBS-0601

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GBH Enterprises, Ltd.
Calculation of Caloric Value
and other Characteristic
Data of Fuel Gas
Plant Note Book Series: PNBS-0601
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2. Refinery Process Stream Purification Refinery Process Catalysts Troubleshooting Refinery Process Catalyst Start-Up / Shutdown
Activation Reduction In-situ Ex-situ Sulfiding Specializing in Refinery Process Catalyst Performance Evaluation Heat & Mass
Balance Analysis Catalyst Remaining Life Determination Catalyst Deactivation Assessment Catalyst Performance
Characterization Refining & Gas Processing & Petrochemical Industries Catalysts / Process Technology - Hydrogen Catalysts /
Process Technology – Ammonia Catalyst Process Technology - Methanol Catalysts / process Technology – Petrochemicals
Specializing in the Development & Commercialization of New Technology in the Refining & Petrochemical Industries
Web Site: www.GBHEnterprises.com
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.

3. Refinery Process Stream Purification Refinery Process Catalysts Troubleshooting Refinery Process Catalyst Start-Up / Shutdown
Activation Reduction In-situ Ex-situ Sulfiding Specializing in Refinery Process Catalyst Performance Evaluation Heat & Mass
Balance Analysis Catalyst Remaining Life Determination Catalyst Deactivation Assessment Catalyst Performance
Characterization Refining & Gas Processing & Petrochemical Industries Catalysts / Process Technology - Hydrogen Catalysts /
Process Technology – Ammonia Catalyst Process Technology - Methanol Catalysts / process Technology – Petrochemicals
Specializing in the Development & Commercialization of New Technology in the Refining & Petrochemical Industries
Web Site: www.GBHEnterprises.com
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:

4. Refinery Process Stream Purification Refinery Process Catalysts Troubleshooting Refinery Process Catalyst Start-Up / Shutdown
Activation Reduction In-situ Ex-situ Sulfiding Specializing in Refinery Process Catalyst Performance Evaluation Heat & Mass
Balance Analysis Catalyst Remaining Life Determination Catalyst Deactivation Assessment Catalyst Performance
Characterization Refining & Gas Processing & Petrochemical Industries Catalysts / Process Technology - Hydrogen Catalysts /
Process Technology – Ammonia Catalyst Process Technology - Methanol Catalysts / process Technology – Petrochemicals
Specializing in the Development & Commercialization of New Technology in the Refining & Petrochemical Industries
Web Site: www.GBHEnterprises.com
Conversion Factors
1 kmol = 22.415 Nm
3
(0 °C, 1.013 bar abs.)
1 Nm
3
= 37.216 scft
1 BTU = 1.05506 kJ
1 mmBTU = 1.05506 GJ
1 bar = 1.02 kg/cm
2
1 kcal = 4.1868 kJ

5. Refinery Process Stream Purification Refinery Process Catalysts Troubleshooting Refinery Process Catalyst Start-Up / Shutdown
Activation Reduction In-situ Ex-situ Sulfiding Specializing in Refinery Process Catalyst Performance Evaluation Heat & Mass
Balance Analysis Catalyst Remaining Life Determination Catalyst Deactivation Assessment Catalyst Performance
Characterization Refining & Gas Processing & Petrochemical Industries Catalysts / Process Technology - Hydrogen Catalysts /
Process Technology – Ammonia Catalyst Process Technology - Methanol Catalysts / process Technology – Petrochemicals
Specializing in the Development & Commercialization of New Technology in the Refining & Petrochemical Industries
Web Site: www.GBHEnterprises.com