Liquid-to-gas ratio
Liquid-to-gas ratio (L/G) is how much liquid is used for a given amount of gas in a wet scrubber. It’s usually shown as gallons per 1,000 actual cubic feet or litres per cubic metre, which makes it easy to compare different systems.
Particulate removal: The L/G ratio is mainly set by the scrubber design. Typical values are 4–20 gal/1,000 ft3 (0.5–3 L/m3). There’s a minimum to wet the internals; after an optimum point, adding more liquid can reduce efficiency by increasing pressure loss.
Gas absorption: L/G is higher, typically 20–40 gal/1,000 ft3 (3–6 L/m3). Higher L/G helps dissolve pollutants. Absorbers often use open designs like venturi, spray chamber, or moving bed for heavy gas loads, with lower gas velocity to improve absorption.
Solubility matters: More soluble gases require less liquid and shorter contact time; less soluble gases need more liquid and longer contact time.
This page was last edited on 3 February 2026, at 05:36 (CET).