Question

For the removal of sub-micron particulate matter (\(<1~\mu\mathrm{m}\)) from flue gases, which of the following devices generally provides the highest collection efficiency?

• A. Electrostatic precipitator
• B. Cyclone separator
• C. Gravity settling chamber
• D. Wet scrubber

Hint:

Efficiency of particulate control devices: \[ \boxed{ \text{ESP} > \text{Wet Scrubber} > \text{Cyclone Separator} > \text{Gravity Settling Chamber} } \] ESPs are best suited for very fine particles.

Answer 1

The Correct Option is A

Electrostatic precipitators (ESPs) use electrostatic forces to charge and collect very fine particles from flue gases. They are highly efficient in removing sub-micron particulate matter and are widely used in thermal power plants and industries. Hence, \[ \boxed{\text{Electrostatic precipitator}} \] is the correct answer. Therefore, \[ \boxed{(A)} \]