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

Abstract

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.