An important parameter in wet scrubbing systems is the rate of liquid flow.
Expressing the amount of liquid used as a ratio enables systems of different sizes to be readily compared.
L/G ratio illustrates a number of points about the choice of wet scrubbers used for gas absorption.
For example, because flue-gas desulfurization systems must deal with heavy particulate loadings, open, simple designs (such as venturi, spray chamber and moving bed) are used.
Solubility governs the amount of liquid required (liquid-to-gas ratio) and the necessary contact time.