Enhancing the reaction efficiency via superhydrophilic bubble path by improved gas absorption capacity
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In this work, we have developed a bubble column with an immersed zigzag superhydrophilic path prepared by coating stainless steel substrates with zwitterion treatment. This reactor design improves mass transfer between liquid and gaseous molecules by maintaining a thin layer of water between bubbles and substrates. This leads to enhanced efficiency and directionality of bubble motion since bubbles do not directly contact substrates. In the first experiment, we successfully demonstrated that the column with the zigzag path is 1.5 times more efficient in dissolving oxygen in water compared to a non-zigzag column. In the second experiment, we passed ammonia gas through bromothymol blue to observe the reaction efficiency, and the color change occurred rapidly due to the superhydrophilic bubble path facilitating 13 times quicker completion of the reaction. Lastly, the experiment involves the absorption of carbon dioxide within calcium hydroxide to produce calcium carbonate indicating the same improvement.