CO2 capture using aqueous ammonia: kinetic study and process simulation

Victor Camille Alfred Darde, Willy J.M. van Well, Erling Halfdan Stenby, Kaj Thomsen

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

Carbon dioxide capture using aqueous ammonia is a post-combustion technology that has shown a good potential. Therefore this process is studied by measuring the rate of absorption of carbon dioxide by aqueous ammonia and by performing process simulation. The rate of absorption of carbon dioxide by aqueous ammonia solvent has been studied by applying a wetted wall column apparatus. The rate of absorption is crucial regarding the sizing of the absorber columns. The overall mass transfer coefficient has been measured at temperatures from 279 to 304 K for 1 to 10 wt% ammonia solutions at loadings up to 0.6. The results were compared with those found for 30 wt% mono-ethanolamine (MEA) solutions.The capture process was simulated successfully using the simulator Aspen Plus coupled with the extended UNIQUAC thermodynamic model available for the NH3–CO2–H2O system. For this purpose, a user model interface was developed. The heat and electricity requirements were analyzed for a base case configuration, and a preliminary sensitivity analysis was performed on the heat and the electricity requirements and on the ammonia slip from the absorber.
Original languageEnglish
JournalEnergy Procedia
Volume4
Pages (from-to)1443-1450
ISSN1876-6102
DOIs
Publication statusPublished - 2011
Event10th International Conference on Greenhouse Gas Control Technologies - Amsterdam, Netherlands
Duration: 19 Sep 201023 Sep 2010
Conference number: 10

Conference

Conference10th International Conference on Greenhouse Gas Control Technologies
Number10
CountryNetherlands
CityAmsterdam
Period19/09/201023/09/2010

Keywords

  • Wetted-wall column
  • Aqueous ammonia
  • Chilled ammonia process
  • CO2 capture
  • Process simulation
  • Rate of absorption

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