COST ANALYSIS OF THE PERFORMANCE OF CO₂ SEPARATION WITH VARIOUS CO₂ CONCENTRATIONS FROM GAS WELLS

The technical and economic challenges are enormous in developing gas wells with a high CO₂ content (> 50 mol %), such as the East Natuna gas field, which has 71 mol % (86 mass %). Carbon capture technology in gas wells with high CO₂ content is studied to find a more economical one. In this study, the technology for capturing high concentrations of CO₂ is varied from gas wells, Controlled Freeze Zone (CFZ), and cryogenic distillation which will be analyzed based on cost. Variations in the CO₂ content of gas wells are 75 %, 80 %, 85 %, 90 %, and 95 % in mass fraction simulated using Aspen Plus V.11.0. Based on this research, CFZ technology and cryogenic distillation can obtain purity up to 99 % and recovery above 78 %. However, the total annual cost (annual capital and operating costs) of CFZ technology is lower than cryogenic distillation technology, so CFZ technology is suitable for capturing CO₂ in gas wells with high CO₂ content.