Mist eliminators upstream of compressors protect equipment from liquid ingestion, so outlet carryover, upset loading, level control, downstream condensation, and pressure drop are more important than a generic efficiency percentage. Bulk liquid and fine mist may require different separation stages.

Amine and glycol mist eliminators can be affected by foaming, hydrocarbon contamination, solids, degradation products, and changing wetting behavior. Separator selection should therefore consider solvent cleanliness and operating history—not only gas velocity and vessel diameter.

Chloride-rich scrubber mist eliminators must manage both corrosion and salt deposition. Material selection, separator openness, drainage, wash-water quality, cleaning access, and pressure-drop monitoring should all be considered together.

Sulfuric acid mist may contain submicron aerosol that conventional wire mesh cannot remove reliably. Where fine aerosol dominates, fiber-bed or staged separation may be required, with careful attention to acid concentration, temperature, pressure drop, solids, and condensation location.

Poor-quality wash water can introduce hardness scale, dissolved salts, suspended solids, and corrosive contaminants into a mist eliminator. Water chemistry, filtration, nozzle condition, evaporation, rinse quality, and drainage should be included in wash-system design.