Dynamic modelling of CO2 absorption for post combustion capture in coal-fired power plants

Lawal, A.; Wang, M.; Stephenson, P.; Yeung, H.

Abstract

Power generation from fossil fuel-fired power plants is the largest single source of CO 2 emissions. Post combustion capture via chemical absorption is viewed as the most mature CO 2 capture technique. This paper presents a study of the post combustion CO 2 capture with monoethanolamine (MEA) based on dynamic modelling of the process. The aims of the project were to compare two different approaches (the equilibrium-based approach versus the rate-based approach) in modelling the absorber dynamically and to understand the dynamic behaviour of the absorber during part load operation and with disturbances from the stripper. A powerful modelling and simulation tool gPROMS was chosen to implement the proposed work. The study indicates that the rate-based model gives a better prediction of the chemical absorption process than the equilibrium-based model. The dynamic simulation of the absorber indicates normal absorber column operation could be maintained during part load operation by maintaining the ratio of the flow rates of the lean solvent and flue gas to the absorber. Disturbances in the CO 2 loading of the lean solvent to the absorber significantly affect absorber performance. Further work will extend the dynamic modelling to the stripper for whole plant analysis. © 2008 Elsevier Ltd. All rights reserved.

Citation

Lawal, A., Wang, M., Stephenson, P., & Yeung, H. (2009). Dynamic modelling of CO2 absorption for post combustion capture in coal-fired power plants. Fuel, 88(12), 2455-2462. https://doi.org/10.1016/j.fuel.2008.11.009

• Journal Article Type: Article
• Acceptance Date: Nov 12, 2008
• Online Publication Date: Dec 4, 2008
• Publication Date: 2009-12
• Deposit Date: Nov 13, 2014
• Journal: Fuel
• Print ISSN: 0016-2361
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 88
• Issue: 12
• Pages: 2455-2462
• DOI: https://doi.org/10.1016/j.fuel.2008.11.009
• Keywords: CO₂ capture, Chemical absorption, Dynamic modelling, Coal-fired power plant, REF 2014 submission!
• Public URL: https://hull-repository.worktribe.com/output/468016
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0016236108004729?via%3Dihub
• Contract Date: Nov 13, 2014