吹込みによるCO₂ガスのNaOH水溶液への吸収

抄録

A mixed CO₂-N₂ gas was injected into aqueous NaOH solution through a glass nozzle of 2.7 to 30.0mm ID and absorption rate of CO₂, gas was measured. The NaOH concentration of the solution was 3 mol·l^-1 and the partial pressure of CO₂ in the gas mixture was kept at 0.1atm. Gas flow rate was varied between 3.0 and 6.0l·min^-1. Frequency of the bubble formation at the nozzle was also measured by a pressure gauge.
Frequency of the bubble formation was 612 to 767 min-1 and mean bubble diameter was calculated as 1.36 to 2.62cm. The overall rate of CO₂ absorption was affected by mass transfer through both gas and liquid boundary layers. Overall mass transfer coefficient of CO₂ absorption was 4.5 to 6.4cm·s^-1 and enhancement factor was estimated as 59 to 84.