Equilibrium concentration profiles of species in CO2-alkanolamine-water systems

Haji-Sulaiman, M.Z. and Aroua, M.K. and Pervez, M.I. (1996) Equilibrium concentration profiles of species in CO2-alkanolamine-water systems. Gas Separation and Purification, 10 (1). pp. 13-18. ISSN 0950-4214

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Abstract

Equilibrium concentrations of species and gas loading in aqueous solutions of alkanolamine loaded with CO2 are being compared with predicted profiles obtained from the Deshmukh-Mather Model. A new technique is being proposed based on titration using a base, NaOH, to determine the concentrations of the different species at equilibrium. The technique is reliable and easy to perform to give reproducible results. Experimental and predicted concentrations of species are in good agreement over a range of gas loading between 0.4 and 1.0 for aqueous AMP solutions. For DEA, the predicted and measured values complement each other at high loading typically above 0.6. At low loading, there is a significant difference between the sets of values for carbamate and bicarbonate. These differences are likely due to the value of the equilibrium constant for the carbamate formation, which is taken as an adjustable parameter in the model, to give the best fit to the experimental data of either CO2 partial pressure or gas loading.

Item Type: Article
Additional Information: Cited By (since 1996):17 Export Date: 21 April 2013 Source: Scopus Language of Original Document: English Correspondence Address: Haji-Sulaiman, M.Z.; Department of Chemical Engineering, University of Malaya, 59100 Kuala Lumpur, Malaysia References: Kent, R.L., Eisenberg, B., (1976) Hydrocarbon Process, 55, pp. 87-90; Austgen, D.M., Rochelle, G.T., Peng, X., Chen, C.C., (1989) Ind Engng Chem Res, 28, pp. 1060-1073; Deshmukh, R.D., Mather, A.E., (1981) Chem Engng Sci, 36, pp. 355-362; Chakraborty, A.K., Astarita, G., Bischoff, K.B., (1986) Chem Engng Sci, 41, pp. 997-1003; Haji-Sulaiman, M.Z., Aroua, M.K., Equilibrium of CO2 in aqueous Diethanolamine (DEA) and Amino Methyl Propanol (AMP) solutions Chem Engng Commun, , in press; Horowitz, W., (1975) AOAC Methods, , George Banta Co; Shahi, P., Hu, Y., Chakma, A., (1995) J Chromatography A, 687, pp. 121-132; Chan, H.M., Danckwerts, P.V., (1981) Chem Engng Sci, 36, pp. 229-230; Jensen, A., Faurholt, C., (1952) Acta Chem Scand, 6, pp. 385-394; Edwards, T.J., Maurer, G., Newman, J., Prausnitz, J.R., (1978) AIChE J, 24, pp. 966-976; Critchfield, F.E., Johnson, J.B., (1958) Anal Chem, 30, pp. 1247-1249; Critchfield, F.E., Johnson, J.B., (1959) Anal Chem, 31, pp. 570-572; Chan, C.Y., Eng, Y.W., Eu, K.S., (1995) J Chem Engng Data, 40, pp. 685-691; Perrin, D.D., (1965) Dissociation Constants of Organic Bases in Aqueous Solution, , Butterworths, London; Littel, R.J., Bos, N., Knoop, G.J., (1990) J Chem Engng Data, 35, pp. 276-277; Hu, W., Chakma, A., (1990) Chem Engng Commun, 94, pp. 53-61; Tontiwachwuthikul, P., Meisen, A., Lim, C.J., (1991) J Chem Engng Data, 36, pp. 130-133; Lee, J.I., Otto, F.D., Mather, A.E., (1972) J Chem Engng Data, 17, pp. 465-468; Roberts, B.E., Mather, A.E., (1988) Chem Engng Commun, 64, pp. 105-111
Uncontrolled Keywords: Alkanolamine; Bicarbonate; CO2; Gas separation; Solubility; Speciation; Amines; Carbon dioxide; Carbonates; Mathematical models; Pressure effects; Sodium compounds; Solutions; Titration; Water; Carbamate; Deshmukh-Mather model; Sodium hydroxide; Separation.
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: 17 Jul 2013 08:23
Last Modified: 11 Dec 2013 02:09
URI: http://eprints.um.edu.my/id/eprint/7513

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