EFFECTS OF FLUE GAS IMPURITIES ON CO2 UTILIZATION FOR PCC

• Main Author: Hafidz Rinaldi, Rahman
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/87766
• Institution: Institut Teknologi Bandung

In the pulp and paper industry, various methods are used to mitigate CO2 emissions, one of which is CO2 fixation through its conversion into PCC (Precipitated Calcium Carbonate). One process involves reacting CO2 with Ca(OH)2. This study aims to determine the optimal method for CO2 emission mitigation by utilizing CO2 from the flue gas of a biomass co-firing power plant to produce PCC, focusing on variables such as CO2 injection flow rate and carbonation reaction time. The study is conducted by setting a specific scope, defining fixed variables aside from the main research objectives, which include operational conditions, microbubbler size, concentration of Ca(OH)2, and initial reaction pH. From the research, it was found that optimal CO2 binding occurs at a low flow rate and when the reaction time reaches the equilibrium pH of CaCO3. PCC formed in the experiment is in calcite rhombohedral found in FTIR analysis. In this study, the optimal flow rate was found to be 0.1 L/min, with a reaction time of 3 minutes to reach a reaction pH of 8.2, where no further conversion occurred, and the maximum conversion achieved was 69.57%. The equilibrium reaction pH for CaCO3 occurred at around pH 8, as no more CO32- ions were formed at lower pH levels. The pH change data in this experiment had an R-value of 0.99, indicating that the pH change over time was very stable.