What is the demister pad used for?

• A. Cooling the process stream
• B. Removing liquid droplets from gas
• C. Filtering chemicals and vapors
• D. Absorbing moisture from air

Answer: (C)

Demister pads act as mist eliminators in gas streams. They provide a surface that encourages entrained liquid droplets to collide and coalesce into larger droplets, which then drain away by gravity. This process cleans the gas by removing liquid droplets before it proceeds to downstream equipment, preventing carryover and fouling. It’s not primarily about cooling the stream, filtering chemical vapors, or absorbing moisture—those would involve other devices or materials.