Modelling and Analysis of the CO2 Post-Combustion Capture Process

Student thesis: Master thesis (including HD thesis)

  • Serge Cheungoue
4. term, Chemical Engineering, Master (Master Programme)
ABSTRACT This project is all about carbon capture and storage. The project aims at setting-up a flow-sheet model of the post-combustion capture of carbon dioxide in order to assess the energy consumption and costs of the process. This should also demonstrate how effective the process is on reducing carbon dioxide in the atmosphere. In addition to this, an exploration of the other capture techniques was conducted in order to be able to see which of the techniques is more viable and feasible economically. The modelling of the capture process that contains a variety of different unit operators was carried out in PRO-II. The Amine thermodynamic was used, since it is the one that is suitable for the absorption of carbon dioxide by the solvent made up of a mixture of water (96%) and monoethanol amine (4%). The results showed that, from a flue gas composed of carbon dioxide ( ; 14%), nitrogen ( ; 80%) and oxygen ( ; 6%), 65.46% pure saturated with water was captured using 0.19% of MEA. Thus, the temperature within the absorber varied from 32 to 43.4 ºC, with a pressure of 18 Atm; while in the regenerator, temperature moved from 70 to 106.1ºC with a 1 Atm pressure. Moreover, it was also seen from the overall heat balance of both the absorber and stripper that the process produced more energy than it consumed. This is essential as such a process is energetically expensive.
LanguageEnglish
Publication date2008
Publishing institutionAalborg University Esbjerg
ID: 16974628