Abstract: There is described an improvement in a process of dispersing/dissolving a gas in a body of aqueous liquid by dispersing/dissolving the gas in a stream of the liquid and introducing the stream into the body of liquid comprising introducing a quantity of non-ionic surfactant, anionic surfactant or mixtures thereof into the liquid thereby inhibiting coalescence of gas bubbles and enhancing dispersion/dissolution.

Abstract: A process of removing carbon dioxide from a liquor in a vessel comprises the step of continuously passing a portion of the liquor into a sidestream and introducing discrete bubbles of between 0.005 mm and 1.0 mm diameter of nitrogen rich gas into the liquor before returning it to the vessel in which the nitrogen acts to adsorb carbon dioxide from the liquor and is then expelled from the liquor as an off-gas. The process also includes introducing a gas to be dissolved in the liquor into the sidestream as discrete bubbles having a diameter of between 0.005 mm and 1.0 mm.