Study of Carbon Dioxide (CO2) Absorption in Single MEA andMixMEA&DEA

• Main Author: Ismail, Mardziah
• Format: Final Year Project
• Language: English
• Published: universiti teknologi petronas 2005
• Subjects: TP Chemical technology
• Online Access: http://utpedia.utp.edu.my/7933/1/2005%20-%20Study%20of%20Carbon%20Dioxide%20%28CO2%29%20Absorption%20in%20Single%20MEA%20and%20MixMEA%26DEA.pdf; http://utpedia.utp.edu.my/7933/

Increasing amount of carbon dioxide (C02) in the atmosphere has lead to growing interest in research for new methods to reduce it because of the global warming effect. Fossil fuel combustion for energy generation is the main source of carbon dioxide emissions. Alkanolamine is one of the commercial solvent in removing CO2 from flue gas. The objective of this study is to study the CO2 absorption in monoethanolamine (MEA) and to determine the optimum percentage of mix amines for optimum absorption. From previous research, mixed amine has been found can improve the CO2 absorption and great savings in regeneration energy requirement. The experiment is conducted in experimental setup which is almost similar to gas bubbler method with various MEA concentrations (15wt%, 20wt% and 28wt%), varying solvent speed (2rpm and 5rpm), and varying mixtures of amines (MEAI5wt% + DEA-5wt%, MEA-20wt% + DEA-10wt%, and MEA-25wt% + DEA- 10wt%). From the experiment that has been done, the higher the solvent speed the higher the C02 removal efficiency. The C02 removal efficiency also increase when the concentration of amine increases. The reaction temperature is higher for higher concentration of MEA and for higher solvent speed. The optimum blend of amines is MEA-20wt% and DEA-10wt% which has high C02 removal efficiency, no significant corrosion problem, and low regeneration energy. Foaming is a bad phenomenon to the absorption process unit. It might cause the equipment damage and loss of production time. From this study it also has been found that the foaming increase when the speed of the solvent increase from 2rpm to 5rpm. It is also expected that the higher the MEA concentration, the higher the foaming height and the higher the collapse time. 111