Coal accounts for a significant percentage of the worldwide electricity generation. However, coal is one of the most impure fuels. The impurities include Al, Fe, S and Hg. These impurities, which are generated during combustion, can be adsorbed onto particles which result from the combustion process and can be emitted into the atmosphere. Oxycombustion along with purification is a leading technology to create a near-zero emissions plant by eliminating almost all of the mercury, SOx, NOx, and particulate pollutants from plant emissions. This technology provides a > 90 % CO2 stream which is suitable for safe and permanent storage (carbon capture and sequestration). The decreased generation of impurities in the CO2 stream will prevent release of these impurities into the environment. The capability of this solution is based on analytical validation of the impurities in the process stream(s). The complexity of NOx and SOx measurements in CO2-rich streams, which will enable compliance to both existing and emerging regulations, is discussed in this contribution.
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