Kinetics of carbon dioxide absorption into aqueous MDEA+bmimBF 4 solutions from 303 to 333K

Ahmady, A. and Hashim, M.A. and Aroua, M.K. (2012) Kinetics of carbon dioxide absorption into aqueous MDEA+bmimBF 4 solutions from 303 to 333K. Chemical Engineering Journal, 200-20. pp. 317-328. ISSN 1385-8947

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Abstract

The kinetics of CO 2 absorption in aqueous solutions of MDEA+bmimBF 4 were investigated using a stirred cell reactor where the relevant parameters were evaluated. The rate equation of the absorption reaction was found to be close to first order with respect to CO 2 at temperatures ranging from 303 to 333K and bmimBF 4 concentration from 0 to 2.0molL -1. The activation energy decreased from 43.32kJmol -1 to 8.65kJmol -1 with increasing bmimBF 4 concentration from 0 to 2.0molL -1 in aqueous 4molL -1 MDEA solution. Calculated results of the enhancement factor and Hatta number showed that the performance of CO 2 absorption in the aqueous 4molL -1 MDEA+bmimBF 4 solution almost obeyed the pseudo first order regime.

Item Type: Article
Additional Information: Export Date: 21 April 2013 Source: Scopus CODEN: CMEJA :doi 10.1016/j.cej.2012.06.037 Language of Original Document: English Correspondence Address: Aroua, M.K.; Chemical Engineering Department, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia; email: mkaroua@um.edu.my References: Galán Sánchez, L.M., Meindersma, G.W., de Haan, A.B., Kinetics of absorption of CO 2 in amino-functionalized ionic liquids (2011) Chem. Eng. J., 166, pp. 1104-1115; Hagewiesche, D.P., Ashour, S.S., Al-ghawas, H.A., Sandall, O.C., Absorption of carbon dioxide into aqueous blends of monoethanolamine and N-methyldiethanolamine (1995) Chem. Eng. Sci., 50, pp. 1071-1079; Rinker, E.B., Ashour, S.S., Sandall, O.C., Kinetics and modelling of carbon dioxide absorption into aqueous solutions of n-methyldiethanolamine (1995) Chem. Eng. 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Uncontrolled Keywords: CO 2 absorption; Ionic liquids; Kinetics; Mass transfer; MDEA; Reaction engineering; bmimBF; Absorption reactions; Carbon dioxide absorption; Enhancement factor; First order; Hatta numbers; Pseudo-first-order; Rate equations; Stirred cell reactors; Activation energy; Enzyme kinetics; Reaction kinetics; Carbon dioxide.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 16 Jul 2013 02:22
Last Modified: 11 Dec 2013 02:36
URI: http://eprints.um.edu.my/id/eprint/7405

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