ABSTRACT
Sulfur can be removed from coal either before combustion by physically separating it from the coal to be burned, or after combustion by separating the resulting sulfur oxides from the flue gas. With precombustion desulfurization, high-sulfur coals can be made into higher quality products containing low quantities of sulfur before ever being sent to a power facility. With postcombustion desulfurization, sulfur can be removed from a power facility flue gas largely irrespective of the sulfur content and character in the original coal. This chapter finds that the greatest sulfur removal typically comes from combining both of these methods, as the limitations on each technique are made up for by the other.
