To investigate the effects of additives such as 2-EH

1-Octanol

on the ammonia bubble absorption

surface tensions of aqueous ammonia with additives were measured by a drop weight method

and performances of absorption of ammonia vapor from an orifice into water were recorded by a video camera and analyzed.In the case with additives

the surface tension decreased significantly. For a given additive concentration

the surface tension of aqueous ammonia increased with the increase of the ammonia when the concentration was less than 10%. However

the surface tension decreased when the concentration was more than 10%.During the bubble absorption process

the ammonia vapor flow rate had little effect on the bubble generative frequency

however

the maximum bubble volume

the maximum absorption height

and the Sherwood number for a single bubble increased when the flow rate of ammonia vapor increased.For a single absorption cycling

the additives 2-EH and 1-Octanol with a suitable concentration range might enhance the heat and mass transfer.