Simulation of CO₂ Capture Process for Coal based Power Plant in South Sumatra Indonesia

Indonesia committed to reduce greenhouse gas emission by 29% in 2030. Carbon dioxide (CO₂) emissions from flue gas in coal power plant must be captured to reduce greenhouse gas emissions. Technology to decrease greenhouse gases on a large scale and in a relatively short period is Carbon Capture and Storage (CCS). Chemical absorption method is a more advantageous CCS technology than other methods owing to high efficiency, low cost, and mature technology. Solvents in chemical absorption include amine-based solvent such as monoethanolamine (MEA) was frequently utilized to absorb CO₂ from low-pressure flue gas streams, especially fossil fuel-based power plant, owing to rapid reaction rate with CO₂ and low cost of raw amines compared to other amines. In this study, Aspen Hysys was used to simulate the CO₂ capture process and 30 wt% of MEA was selected as a solvent which is mainly handy for CO₂ capture from flue gas. The results show that lean amine temperature, flue gas temperature, and regenerator feed temperature has effects on the CO₂ capture and energy consumption. The rich-split stream configuration was developed to examine energy reduction in various split fractions. The minimum in energy consumption and reboiler duty occurs when 30% of the solvent is split to the top of the column. (paper)