Techniques for Mercury Control and Measurement in Gasification Systems

Introduction A major concern for power systems that use coal as an energy source is the air emissions from the plant. Although certain air emissions are currently regulated, the emergence of new regulations for other pollutants are on the horizon. Based on an earlier 1998 Report to Congress, the Environmental Protection Agency (EPA) in December 2000 announced its finding that regulation of mercury emissions from utility steam generating units is necessary and appropriate. Emission standards will be proposed in December 2003 with promulgation following a year later. Additionally, the Clear Skies Initiative, proposed on February 14, 2002, would, if implemented, dramatically limit the emissions of mercury from coal-utilizing facilities. The development of mercury emission regulations will have a direct impact on coal-using facilities, both conventional steam generating systems as well as integrated gasification combined cycle (IGCC) systems.