Abstract
This work highlighted the prediction of the emission rates of the products of combustion using a fuel oil of specific gravity of 0.9. The two reaction pathways of complete combustion and incomplete combustion were used differently to ascertain the emission rates. Ultimate analysis were conducted on the fuel oil to show the percentage composition of elements using ASTM 3178 method for carbon and hydrogen, Kjedahl method for nitrogen, ASTM D1552 for sulphur and the differences used to compute that of oxygen. The estimated percentages of the various elements were the stoichiometrically used to compute the emissions rates at standard conditions. The basis of the computation was a fuel oil flow rate of 10Tonnes/h and the following emission rates were predicted for the complete combustion reaction pathway: 31,246Kg/h for CO2, 65Kg/h for H2O, 158Kg/h for NO2 and 20Kg/h for SO2 while 9,940Kg/h for CO2, 15,623Kg/h for CO, 11,700Kg/h for H2O, 11Kg/h for H2S and 158Kg/h for NO2 were predicted for the incomplete combustion pathway. The study noted that this predictive path should be taken where effective devices or logistics are not in place to measure emissions from combustion systems.
Highlights
Combustion is related to the burning of a fuel
Since nitrogen is abundant in air, it is oxidised to NO2 at very high temperatures while SO2 is produced only if sulphur is present in the fuel [1]
Reference [2] reiterated that while explaining complete combustion as an interaction between fuel and oxygen resulting in total consumption which requires specific duration of time and turbulence as well as high temperature needed to burn all the fuel elements
Summary
Combustion is related to the burning of a fuel. The fuel could be solid, liquid or gas. Reference [1] reckons that complete combustion requires a fuel burning in the presence of oxygen producing limited products. Reference [1] further reiterated that when a fuel of hydrocarbon categorisation burns in the presence of oxygen, the products is predominantly CO2 and H2O. Reference [2] reiterated that while explaining complete combustion as an interaction between fuel and oxygen resulting in total consumption which requires specific duration of time and turbulence as well as high temperature needed to burn all the fuel elements. Reference [1] explained what makes up incomplete combustion as combustion requiring insufficient oxygen needed to oxidise the fuel to CO2 but instead leading to the formation of CO. Reference [3] reiterated that CO is a product in the incomplete combustion fuel carbon. In order to predict the emission rates, these elemental categorisations in percentages are used to estimate the empirical formation and stoichiometric evaluations yield the emission rate
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