|
CO2 Capture Technology Description
Double Click Here for a Process Animation
- The exhaust gas from the power plant is the source of CO2.The exhaust gas is cooled before it reaches the capture process itself in order to optimise the process. The flue-gas cooler is the largest consumer of cooling water in the process, typically using 50% of the cooling water.
- The flue-gas will meet some physical resistance within the capture plant on its way to the atmosphere, and this will result in a certain pressure drop in the exhaust gas. In order to ensure that the power plant’s gas turbine does not suffer a loss of power because of the capture facility, a blower is located in the flue-gas duct, either before the cooling unit or between it and the actual capture plant.
- From the blower, the gases are brought to the bottom of an absorption tower, which is filled with a packing material that offers a large surface that the absorption solvent follows on its way down through the tower. The solvent is an amine or a mixture of amines dissolved in water, which absorb the CO2 in the flue-gas as it flows upwards through the tower. The CO2 removal efficiency for flue-gases from gas-turbine exhaust will typically be 85%.
- After the CO2 has been captured by the amine, it has to be released by heating the solvent. The desorption of CO2 takes place in the desorption tower, also known as a stripper. This is done by allowing the amine containing the CO2 to flow down the packing material that fills the tower, while steam and CO2 flow upwards. The steam has two functions:a) it transfers the necessary heat to the amine, and b) it draws the released CO2 out of the tower. The mixture of steam and CO2 that exits the top of the stripper is cooled down, and most of the steam is condensed while the CO2 remains in a gaseous phase.
- The water is pumped back to the stripper while the CO2 is directed to the dehydration and compression stages and on to transportation.
The following provides greater detail on EESTech's products and services offered:
For Commercial enquiries please contact Ian Hutcheson
Email: ihutcheson@eestechinc.com
Address
Ground Floor, Engineering House,
447 Upper Edward Street, Brisbane QLD 4000 Australia
Telephone: +61 7 3832 9883
Facsimile: +61 7 3832 1336
|
