The plant is based on the extraction of CO₂ from an existing flue gas source resulting in significant operational savings compared to traditional CO₂ Generation Plants. Basically, any available flue gas source can be used. The MEA solvent is continuously purified through a unique system allowing for a high O₂ feed gas content that would result in excessive solvent degradation and plant corrosion in other installations. Inhibitors are not needed and the solvent used constitutes a 35 w/w % MEA solution, which is a non-proprietary component, easily available on the merchant market.

The flue gas is directed to a flue gas scrubber, in which the gas is cooled and water condensed. Any SO₂ present in the flue gas will be removed by means of a chemical reaction with Sodium Hydroxide (NaOH). The NaOH is automatically added to the scrubbing water through pH control.

After cooling and scrubbing, the gas is led via an exhauster through an absorber, in which the gas flows counter-current to the MEA solution flow. By chemical reaction, the MEA solution absorbs the CO₂ from the flue gas. The MEA solution containing the absorbed CO₂ (referred to as rich MEA solution) is first pressurized and heated in a heat exchanger and then led to the NOxFlash column. Here most of the contaminants like O₂, N₂ and NO are removed from the rich MEA solution by flashing to the absorber pressure.

A heating stream of pure CO₂ is added to the bottom of the NOxFlash column for further reduction of the contaminants in the MEA solution. This optimizes the process yield to the best possible CO₂ product without any use of expensive chemicals (Pentair Union Engineering Patent).

Then the rich MEA solution is pumped to a stripper, where the CO₂ is released from the MEA solution by means of heat added to a reboiler. Typically, the heat comes from an external steam source, but if the flue gas is hot, it may be possible to utilize this heat as well. The CO₂-depleted MEA solution (referred to as lean MEA solution) is recycled to the absorber. After exiting the top of the stripper, the CO₂-rich gas is cooled in a gas cooler and washed in an after-scrubber for removal of potential MEA carry-over. The gas is then compressed in two stages to approx. 15-18 bar(g) by the CO₂ compressor.