Development of dry methods for the removal of SO_2 and NO_x from Flue Gases - A Review

摘要

Continuous increase in economic activities couple with the growing population throughout the world has led to a tremendous increase in energy consumption. In the near future, the energy consumption is expected to further increase especially in developing countries. This has led to a significant increase in industrial activity in recent times and consequently resulted in a massive increase of pollutants, especially air pollution released to the atmosphere. Among the several air pollutants that contaminate our planet, SO_2 and NO_x have received special attention due to the fact that these two pollutants have toxic and acidic characteristics. SO_2 and NO_x have been linked to the formation of acid rain and many other undesirable environmental hazards. This paper reviews background information on the various approaches and methods that are currently being used to control SO_2 and NO_x emissions. Particular interest is given to research findings on the development of dry-type processes at low temperature that appear to be the most promising technique for the removal of SO_2 and also simultaneous removal of SO_2 and NO_x.