D107 Study on a Single Bubble Absorption of Ammonia/Water System : Influence of Pressure on Bubble Diameter and Mass Transfer Coefficient

Abstract

Mixing of gas and solution in a bubble type absorption system is better than that in a falling film type. Experimental study was performed on ammonia bubble absorption. Ammonia was provided through a single orifice into ammonia aqueous solution under system pressures of 0.1-0.4 MPa. Concentration of the solution was 0-0.3 kg/kg and temperature was at 295 and 313 K. System pressure had effects on the initial bubble diameter and mass transfer coefficient. It was clarified that bubble diameters increased with increasing ammonia flow rates and decreased with increasing system pressure. Experimental formulations of bubble diameter and mass transfer coefficient were obtained.