Experimental Investigation of Reactive Absorption of Ammonia and Carbon Dioxide by Carbonated Ammonia Solution

Document Type: Research Note


1 Faculty of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163 Tehran, I.R. IRAN

2 Nuclear Fuel Cycle School, Nuclear Science and Technology Research Institute, P.O. Box 14155-1339 Tehran, I.R. IRAN


In this work, reactive absorption of gases in aqueous electrolyte solutions has been investigated resulting in the development of a procedure in order to calculate the concentrations of ionic and molecular species in the liquid phase. Two duplicate experiments were conducted to investigate simultaneous reactive absorption of ammonia and carbon dioxide in partially carbonated ammonia solutions. The experiments were carried out employing an absorption  pilot plant. The compositions of the electrolytes (ammonia and carbon dioxide groups) have been determined using principle knowledge of electrolyte solutions. The results revealed that the concentrations of ionic and molecular species in the liquid phase drastically influence the absorption rates of ammonia and carbon dioxide.


Main Subjects

[1] Kohl A., Nielsen R., "Gas Purification", 5th Edition, Gulf Publications Company, (1997).

[2] Maceiras R., Alvarez E., Angeles M., Effect of Temperature on Carbon Dioxide Absorption in Monoethanolamine Solutions, Chem. Eng. J., 138, p. 295 (2008).

[3] Van Loo S., Van Elk E.P., Versteeg G.F., The Removal of Carbon Dioxide with Activated Solutions of Methyl-Diethanol-Amine, J. Petrol Sci. Eng., 55, p. 135 (2007).

[4] Kloeker M., Kenig E.Y., Hoffmann A., Kreis P., Gorak A., Rate-based Modeling and Simulation of Reactive Separations in Gas/vapour-Liquid Systems, Chem. Eng. Process, 44, p. 617 (2005).

[5] Danckwerts P.V., "Gas Liquid Reactions",McGraw-Hill,New York, (1970).

[6] Brettschneider O., Thiele R., Faber R., Thielert H., Wozny G., Experimental Investigation and Simulation of the Chemical Absorption in a Packed Column for the System, Separa. purifica. Technol., 39, p. 139 (2004).

[7] Asprion N., Nonequilibrium Rate-Based Simulation of Reactive Systems: Simulation Model, Heat Transfer, and Influence of Film Discretization, Ind. Eng. Chem. Res., 45, p. 2054 (2006).

[8] Taylor R., Krishna R., "Multicomponent Mass Transfer", John Wilrey,New York(1993).

[9] Yu W.C., Astarita G., Selective Absorption of Hydrogen Sulphide in Tertiary Amine Solutions, Chem. Eng. Sci., 42, p. 419 (1987).

[10] Thielert H., Simulation und Optimierung der Kokereigaswa Sche, Ph.D. Thesis, Technical University of Berlin, Germany, (1997).

[11] Kobus A., "Ein Heuristisch-Numerischer Ansatz Zum Systematischen Entwurf und Design von Absorptionsverfahren", VDIVerlag, Dusseldorf, (1999).

[12] Gandhidasan P., "Heat and Mass Transfer in Solar Regenerators", in: N.P. Cheremisin off (Ed.), Handbook of Heat and Mass Transfer, vol. 2, Gulf Publ. Comp., Houston, pp. 1475-1499 (1986).

[13] Kenig E.Y., Kholpanov L.P., Katysheva L.I., I.H.Markish, Malyusov V.A., Calculation of Two-Phase Non-Isothermal Absorption in a Liquid Film in Downward co-Current Fow, Theor. Found. Chem. Eng., 19, p. 97 (1985).

[14] Noeres C., Kenig E.Y., Gorak A., Modeling of Reactive Separation Processes: Reactive Absorption and Reactive Distillation, Chem. Eng. Process, 42, p. 157 (2003).

[15] Stankiewicz A., "Re-Engineering the Chemical Processing Plant", Marcel Dekker, (2004).

[16] Ghaemi A., Shahhosseini Sh., Ghannadi M., Nonequilibrium Dynamic Modeling of Carbon Dioxide Absorption by Partially Carbonated Ammonia Solutions, Chem. Eng. J., 149, p. 110 (2009).

[17] Edwards T.J., Newman G., Newman J., Prausnitz J.M.,Thermodynamics of Aqueous Solutions Containing Volatile Weak Electrolytes, AIChE J., 21, p. 248 (1975).

[18] Pitzer K.S., Thermodynamics of Electrolytes - 1. Theoretical Basis and General Equations, J. Phys. Chem., 77, p. 268 (1973).

[19] Edwards T.J., Maurer G., Newman J., Prausnitz J.M., Vapor-liquid Euilibria in Multicomponent Aqueous Solutions of Volatile Weak Electrolytes, AIChE J., 24, p. 966 (1978).

[20] Beutier D., Renon H., Representation of NH3-H2S-H2O, NH3-CO2-H2O and NH3-SO2-H2O Vapor-Liquid Equilibria, Ind. Eng. Chem. Process Des. Dev., 17, p. 220 (1978).

[21] Chen Ch.Ch., Britt H.J., BostonJ.F., Evans L.B., Extension and Application of the Pitzer Equation for Vapor-Liquid Equilibrium of Aqueous Electrolyte Systems with Molecular Solutes, AIChE J., 25, p. 820 (1979).

[22] Reid R.C., Prausnitz J.M., Poling B.E., "The Properties of Gases and Liquids",McGraw-Hill,New York, (1987).

[23] Shen J., Yang Y., Maa J., Promotion Mechanism for CO2 Absorption into Partially Carbonated NH3 Solutions, J. Chem. Eng. Japan, 32, p. 378 (1999).

[24] Krop J., New Approach to Simplify the Equation for the Excess Gibbs Free Energy of Aqueous Solution of Electrolytes Applied to the Modeling of the NH3-CO2-H2O Vapor-Liquid Equilibria, Fluid Phase Equilibria, 163, p. 209 (1999).

[25] Brewer L., "In Flue Gas Desulphurization", Hudson, J. L., Rochelle, G. T.,Ed., ACS Symposium Series 188, American Chemical Society, Washington, DC, (1982) 1-39.

[26] Brewer L.,UniversityofCalifornia,Berkeley, Personal Communication, (1986).