INFLUENCE OF AMINE STRUCTURAL CHARACTERISTICS ON N-NITROSAMINE FORMATION POTENTIAL RELEVANT TO POST-COMBUSTION CARBON DIOXIDE CAPTURE SYSTEMS

摘要

Amine-based carbon capture is one of the most promising technologies for post-combustion CO2 capture implementation in the near future. The Norwegian government, in concert with Statoil, is planning to construct one of the first post-combustion CO2 capture facilities at a combined heat and power plant at the Mongstad refinery in Norway, and amine-based capture technologies are major contenders for this facility. In an amine-based post-combustion CO2 capture system, flue gases are passed through an "absorber" column where a counter-current amine-based solvent absorbs CO2, removing it from the gas phase. The CO2-rich amine solution then proceeds to a "desorber" column, where high temperatures reverse the absorption reaction, regenerating the amine and releasing the CO2. The CO2 is compressed and routed to underground storage for sequestration. Countercurrent water scrubbing units (water wash units) generally are employed to remove amines and other potential contaminants from flue gases prior to atmospheric release.