ABSTRACT
Usually, the term fluidized has been applied to the two-phase mixture of gas and solids. Fluidized bed boilers use, for example, an agitated mixture of fuel (coal), combustion gases, and sometimes lime or limestone to enhance combustion while reducing emissions. The gas is injected into a mobile bed of solids. A two-phase mixture of liquid and gas can equally be called fluidized. This technique injects the gas into a mobile, agitated, zone of liquid. Because the speed of dissolution of gases into liquid is typically enhanced by stirring, the agitation in these designs is intended to increase the speed of mass transfer. The vessel velocities are therefore typically higher than other types of absorbers.
