A 300 MW thermal power plant burns natural gas which has 10,000 kcal/kg calorific value. Combustion chamber has 70% thermal efficiency and operates with % 20 excess air.
Assuming that natural gas is totally composed from methane:
(a) Calculate the total volumetric flowrate of stack gas (flue gas)
(b) Calculate the proportions of each gas in the flue gas on wet and dry basis
We know that there is S (sulfur) impurity in natural gas, therefore some SO2 will be generated as an air pollutant from natural gas-powered plants. If we know that the emissions factor for release of SO2 from natural gas-thermal power plant is 0.01 g/Nm3.
(c) Calculate the mass flow rate of SO2 for this plant
(d) Calculate the SO2 mass concentration in the flue gas
(e) Check if this power plant meets the emission standard