Introduction to Carbon Capture From Coal Fired Powerstations
Our Fossil fueled power stations produce the biggest percentage of carbon dioxide gas, emitting it straight to the atmosphere.
The CO2 is formed when we burn a fossil fuel,
Fuel + Air = Energy + CO2 + H2O
The amount of CO2 produced is proportional to the type of fossil fuel used,
Coal -1.00T of CO2/MWh
Oil - 0.75T of CO2/MWh
Gas - 0.50T of CO2/MWh
As we can see from the above figures, coal is the worst CO2 producing culprit, but ironically we have much more coal reserves- enough to last us 300 to 400 years- compared to current estimates that show oil and gas supplies running out this century.
In order to use coal as a fuel in power stations without polluting the atmosphere, we need to remove the CO2 from the coal combustion gasses and store it in some safe location where it cannot escape back into the atmosphere.
In this article we will examine the methods used in the capture of CO2 from coal-fired power stations combustion gasses as part of my series on fossil fuelled power stations.
We shall begin by recapping how power is produced from coal, and then examine a current method of capturing the CO2 from the gasses after they have passed through the normal fume treatment unit.