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Reactors, Kinetics, and Catalysis
Equilibrium and absorption kinetics of carbon dioxide by solid supported amine sorbent†
Article first published online: 9 FEB 2011
DOI: 10.1002/aic.12516
Published 2011 American Institute of Chemical Engineers (AIChE)
Additional Information
How to Cite
Monazam, E. R., Shadle, L. J. and Siriwardane, R. (2011), Equilibrium and absorption kinetics of carbon dioxide by solid supported amine sorbent. AIChE J., 57: 3153–3159. doi: 10.1002/aic.12516
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Publication History
- Issue published online: 10 OCT 2011
- Article first published online: 9 FEB 2011
- Accepted manuscript online: 13 DEC 2010 03:02PM EST
- Manuscript Revised: 7 DEC 2010
- Manuscript Received: 7 JUN 2010
Funded by
- Department of Energy for funding the research through the Fossil Energy's Carbon Sequestration/CO2 Capture Research program
- Abstract
- Article
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- Cited By
Keywords:
- adsorption gas;
- diffusion;
- gas purification;
- reaction kinetics;
- design
Abstract
The equilibrium and conversion-time data on the absorption of carbon dioxide (CO2) with amine-based solid sorbent were analyzed over the range of 303–373 K. Data on CO2 loading on amine based solid sorbent at these temperatures and CO2 partial pressure between 10 and 760 mm Hg obtained from volumetric adsorption apparatus were fitted to a simple equilibrium model to generate the different parameters (including equilibrium constant) in the model. Using these constants, a correlation was obtained to define equilibrium constant and maximum CO2 loading as a function of temperature. In this study, a shrinking core model (SCM) was applied to elucidate the relative importance of pore diffusion and surface chemical reaction in controlling the rate of reaction. Application of SCM to the data suggested a surface reaction-controlled mechanism for the temperature of up to 40°C and pore-diffusion mechanism at higher temperature. Published 2011 American Institute of Chemical Engineers AIChE J, 2011