부산대학교 도서관

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.cej.2009.04.064 Byline: Jose A. Delgado, Maria A. Uguina, Jose L. Sotelo, Vicente I. Agueda, Abel Sanz Keywords: Hollow fiber membrane module; Diethanolamine; Carbon dioxide; Contactor performance; Lean carbon dioxide loading; Productivity Abstract: The absorption of carbon dioxide from a carbon dioxide/nitrogen mixture into an aqueous diethanolamine solution (as an example of a typical amine solution) using a hollow fiber contactor is simulated to obtain the effect of several operational variables (liquid velocity, fiber length, lean carbon dioxide loading, and amine concentration) on productivity and amine solution to carbon dioxide ratio. The model employed is based on the ones commonly used in the literature for this process, but it was significantly improved as some simplifications usually considered (irreversible reaction, low carbon dioxide loading, constant partition coefficient of molecular carbon dioxide between liquid and gas phases, absence of bicarbonate and carbonate anions) have been removed. The effect of these simplifications on the simulated results is quite important. A simple performance parameter study is proposed to evaluate the contactor's performance, keeping the feed gas concentration and the fraction of carbon dioxide removal constant. This procedure leads to optimum values of the liquid velocity and lean carbon dioxide loading, while the performance parameter improves with amine concentration. Author Affiliation: Department of Chemical Engineering, Universidad Complutense de Madrid, Av. Complutense s/n, 28040 Madrid, Spain Article History: Received 6 February 2009; Revised 22 April 2009; Accepted 28 April 2009