CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Heat requirement for regeneration of aqueous ammonia in post-combustion carbon dioxide capture

Henrik Jilvero (Institutionen för energi och miljö, Energiteknik) ; Fredrik Normann (Institutionen för energi och miljö, Energiteknik) ; Klas Andersson (Institutionen för energi och miljö, Energiteknik) ; Filip Johnsson (Institutionen för energi och miljö, Energiteknik)
International Journal of Greenhouse Gas Control (1750-5836). Vol. 11 (2012), p. 181-187.
[Artikel, refereegranskad vetenskaplig]

The present work evaluates ammonia as a carbon dioxide (CO2) solvent for post-combustion carbon capture, focusing on the thermal performance of the ammonia regeneration process and the operating conditions for the aqueous ammonia process. The main parameters investigated were the CO2-loading of the lean solution (0.2-0.5) and the ammonia concentration (2-20%). An equilibrium-based electrolyte model was used in process simulation software to evaluate the performance of the ammonia regeneration. The heat requirement was approximately 2500 kJ/kg CO2 captured. Running conditions in which the precipitation of solids occurred did not enhance the thermal performance. The main reaction pathway for the absorption of CO2 was identified as the formation of bicarbonate through the reaction of ammonia with CO2. The heat of reaction required to desorb CO2 of ammonia was similar to that required for monoethanolamine (MEA). However, significantly less water was evaporated during the regeneration process with ammonia, resulting in a lower heat requirement for regeneration.

Nyckelord: Chilled ammonia, Post-combustion, CO2 capture, Aqueous ammonia, Heat requirement, extended uniquac model, co2 capture, electrolyte systems, power-plants, absorption, kinetics, energy

Denna post skapades 2013-03-04. Senast ändrad 2014-09-02.
CPL Pubid: 174355


Läs direkt!

Länk till annan sajt (kan kräva inloggning)