STUDY OF GAS-LIQUID ABSORPTION IN TERMS OF BUBBLE-FLUID HYDRODYNAMIC AND MASS TRANSFER PARAMETER: LIQUID PHASE AND GAS PHASE

Abstract

This research focus on study the effect of continuous system on the bubble hydrodynamic and mass transfer parameters (Qg, QL, DBd, UBd a, kL and kLa). The experiment were set up in a cylindrical acrylic column with 0.15 m inside diameter and 1 m in height. ILALR was setup an acrylic plate for liquid recirculation. Moreover, mass transfer determination, liquid phase was removed dissolved oxygen by using sodium sulphite (Na2SO3). The bubble hydrodynamic mechanisms are investigated by the high speed camera (100 images/sec) and image analysis program is used to determine the bubble hydrodynamic parameters. The bubbles are generated by rigid diffuser which located at the bottom of column. Plastic media were added into the bubble column at 2% 5% 10% and 15% v/v), air flow rate from 2.5 to 15.0 l/min and liquid flow rate from 0-10 l/min. the result showed mass transfer (kLa) relate to increase the concertation from 2% to 15% (v/v) and gas flow 2.5 to 15 l/min, at media concentration 10% (v/v) has the highest kLa value (1.1×10-2 to 3.23 ×10-2 s-1). The bubble diameter (DB) increase from 2.55 to 3.97 mm with increase gas flow rate from 2.5 to 15 l/min. The bubble velocity (UB) slightly decrease from 0.094 to 0.015 m/s with increase liquid flow rate from 0 - 10 l/min and Interfacial area (a) increase 0 - 547.87 m-1 with gas flow rate increase from 2.5 - 15 l/min.