Simulation and Analysis of CO2 Capturing from Converter Gas Using Monoethanolamine

Abstract

Converter steelmaking is a key part of steel production, and the resulting converter gas contains a large amount of CO₂. CO₂ capture of converter gas can benefit the reduction of CO₂ emissions in the steel industry. In this study, a post-combustion capture process based on monoethanolamine (MEA) was established in Aspen Plus, and the absorption and desorption performance of MEA on converter gas were investigated by simulation using the thermodynamic model of ELECNRTL. Increasing the depletion flow rate, temperature, and MEA concentration can help to improve the CO₂ capture rate; the feed position and desorption pressure affect the CO₂ desorption effect, and the best desorption effect is achieved when the feed position is the second tray, and the desorption tower pressure is 1.9 bar. The results of the study can provide a new idea for CO₂ capture at the end of converter steelmaking, which is of great significance for the progress of CCUS technology in the iron and steel industry.