Thermodynamic modelling to optimise flue gas of a refinery furnace Online publication date: Wed, 07-Sep-2022
by Hossein Ghorbani; Samira Heidari; Mohamad Amin Hemmati; Feridun Esmaeilzadeh
International Journal of Oil, Gas and Coal Technology (IJOGCT), Vol. 31, No. 2, 2022
Abstract: The effect of flue gas including O2, CO2, H2O, CO, and NOx on the characteristics of the flame and the amounts of pollutants emission were investigated. A set of equations based on Gibbs free energy and component balance was developed and solved using Quasi-Newton method to obtain the volume percentage of the flue gas components. The validity of the proposed model was confirmed with the field data obtained from the fluid catalytic cracking (FCC) with an average absolute relative deviation (AARD) of less than 2%. The effect of pressure and temperature was investigated on the volume percentage of the flue gas components. The results revealed that increasing pressure shifted the reactions toward the reactants, which produced less moles of NOx and CO2 gases and more moles of CO gaseous. Rising temperature increased the amount of NOx and CO gaseous and reduced the volume percentage of CO2 gaseous in the flue gas. [Received: September 16, 2020; Accepted: May 28, 2021]
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