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An Introduction to Sulfur and Nitrogen Oxides Control in Air Pollution

J. Paul Guyer, P.E., R.A., Fellow ASCE, Fellow AEI

All fossil fuels contain sulfur compounds, usually less than 8 percent of the fuel content by weight. During combustion, fuel-bound sulfur is converted to sulfur oxides in much the same way as carbon is oxidized to CO2. Sulfur dioxide (SO2) and sulfur trioxide (SO3) are the predominant sulfur oxides formed. All fossil fuel burning processes also produce NOx. The principle oxides formed are nitric oxide (NO) which represents 90-95 percent (%) of the NOx formed and nitrogen dioxide (NOx) which represents most of the remaining nitrogen oxides.

This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.

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