Modeling of Separation from Flue Gas by Methyldiethanolamine and 2-(1-Piperazinyl)-Ethylamine in Membrane Contactors: Effect of Gas and Liquid Parameters
Publication: Journal of Energy Engineering
Volume 141, Issue 4
Abstract
The solution MDEA/PZEA [methyldiethanolamine/2-(1-piperazinyl)-ethylamine] was used as a new absorbent in membrane gas absorption technology. In the present work, a two-dimensional (2D) mathematical model was developed to describe the behavior of absorption from flue gas in a hollow fiber membrane contactor under a nonwetted condition. The modeling predictions were in good agreement with the literature data. Meanwhile, the simulation results indicated that the decrease in gas velocity, gas temperature and concentration in the feed gas, and the increase in those of the liquid phase promoted the removal effect. Additionally, adding an activator into the MDEA solutions dramatically improved the absorption performance. It was found that the optimum blend concentration was when was equal to 1 considering the costs and comprehensive separation performance. Therefore, MDEA/PZEA could be a good alternative to alkanolamines for membrane separation.
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Acknowledgments
This work was supported by the Fundamental Research Funds for China National Tobacco Corp. Chongqing Branch (No. NY20130501010010) and the Central Universities (Nos. CDJZR12140034, CDJZR14145501).
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Published In
Journal of Energy Engineering
Volume 141 • Issue 4 • December 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Feb 16, 2014
Accepted: May 27, 2014
Published online: Aug 1, 2014
Discussion open until: Jan 1, 2015
Published in print: Dec 1, 2015
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