CO2 Gas Reduction Using the Absorption Method as an Effort to Support Carbon Capture and Storage (CCS) Technology

Abstract

Significant changes in global temperature occur when CO₂ gas produced increases from industrial combustion processes that still use fossil fuels. These fuels contribute to environmental damage that will result in greenhouse gas emissions. One form of effort made by using Carbon Capture and Storage (CCS) technology is effectively able to reduce global warming. The reduction process is carried out using NaOH and KOH solutions by comparing the effectiveness of the captured gas. This study was conducted to determine the effect of solution and gas flow rates between NaOH and KOH absorbents on the removal of dissolved CO₂ gas. The methods chosen were sampling method and alkalimetric method. The method was used to determine the variation of absorbent flow rate of 2, 4 and 6 L/min. While the gas flow rate used is 10, 20 and 30 L/min. The results showed that the effective flow rate variation was obtained at a speed of 2 L/min with a gas flow rate of 30 L/min. The concentration that is removed in the absorbent is obtained 52% of CO₂ gas absorbed in NaOH solution with an electric voltage of 0.817 Volt, while KOH is obtained by 48% with an electric voltage of 0.798 Volt. The analysis results will be used as electrochemical-based electrical energy. It can be concluded that the effective absorbent solution is NaOH which can reduce CO₂ gas optimally which has a correlation to the flow rate of the solution and gas and is able to produce electrochemical-based electrical energy.