The measurement of gas dissolution into liquid by pH based laser absorption and

bstract The objective of the present contribution is to establish the measurement technique of the gas dissolution rocess by high sensitive pH measurement employing the absorbing detection of molecules. An accurate estimation f the gas dissolution requires the transitional behavior of gas diffusion in liquid. We measure the forced jet mixing yer and the induced natural convection caused by CO2 dissolution into water with the combination of PIV method. Figure 1 illustrates the simplified experimental setup for the simultaneous measurements of CO2 gas laissolution process by pH measurement using laser absorption and velocity distribution of its natural convection due o the density change by dissolution. The results of the CO2 gas dissolution measurement into water are shown in igure 2 (a). A pH7.8 Phenol Red water solu n is in the measurement region and upper part of the reservoir is filled ith CO2 gas. Though the gas dissolution is f CO2 absorbed liquid starts to sink unstead hown in Figure 2 (b) to investigate the dyna elocity field has drastically changed after nstability of density distribution. The pre emperature or flow field, and can be e ombination of CT technique, since we can