Carbon Dioxide (CO2) Absorption Process Using Sodium Hydroxide (NaOH)

Abstract

⎯ An absorption process can be carried out to reduce carbon dioxide gas emissions in the surrounding environment. Absorption is a contact process between a mixture of gas and liquid that aims to remove one of the gas components by dissolving it in a suitable liquid. In this study, the CO 2 absorption process was carried out to determine the effect of CO 2 flow rate on the amount of CO 2 absorbed with NaOH absorbent. The results showed that the correlation between CO 2 flow rate and absorption factor was inverse because an increase in CO 2 flow rate caused the contact between CO 2 gas and NaOH to decrease. As a result, the absorption factor decreased because the ratio of CO 2 was greater than the absorbent. While the relation between L/V and the absorption factor is directly proportional if the flow rate of the liquid increases, the retained liquid tends to saturate and can accelerate the diffusion of CO 2 in the water, so the absorption factor also increases. In addition, after the absorption of CO 2 gas, sodium carbonate is produced, which is the result of the reaction of CO 2 with NaOH.