In fluidized-bed combustion of coal, what is mixed with coal to remove which major air pollutant?
A) sand; nitrogen oxides
B) limestone; carbon dioxide
C) sand; sulfur oxides
D) limestone; sulfur oxides
E) water; sulfur oxides

Question

Quizplus · Accepted Answer

Limestone is mixed with coal to remove sulfur oxides, which are a major air pollutant. This process is known as flue gas desulfurization. The limestone reacts with the sulfur oxides to form solid calcium sulfite, which can then be disposed of or further processed.

In Fluidized-Bed Combustion of Coal, What Is Mixed with Coal