Raman Spectroscopic Study for the Determination of Monoethanolamine Concentration

Abstract:

Thermodynamic model is one of the important elements in designing and operating CO₂ removal systems, thus accurate determination of the thermodynamic properties of CO₂ in aqueous amine is of major interest for both technical and economical considerations. Quantitative Raman study of aqueous monoethanolamine (MEA) solutions of concentration ranging from 0 to 99 mass % in the spectral region between 300 and 3100 cm^{− 1} was performed. Band envelopes were resolved with Gaussian Lorentzian function. Progressive growth of area under these peaks with increasing concentration was used as the parameter to construct calibration curve. Area ratio of selected peaks was plotted against MEA concentration to depict the relationship between MEA concentration and each area ratio. Correlation for A₁₄₆₀/A₉₃₃ has coefficient of determination closest to unity and lowest mean squared area. MEA concentration can be calculated from the equation derived from correlation between A₁₄₆₀/A₉₃₃ and MEA mass %.

• Periodical: Applied Mechanics and Materials (Volume 625)
• Pages: 709-713
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.625.709
• Online since: September 2014
• Authors: Mee Kee Wong, Mohd Azmi Bustam, Mohd Shariff Azmi*
• Keywords: MEA, Quantitative Analysis, Raman Spectroscopy

References

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

DOI: 10.1016/0950-4214(95)00021-6

[2] V. Ermatchkov, Á. Pérez-Salado Kamps, and G. Maurer, Chemical equilibrium constants for the formation of carbamates in (carbon dioxide + piperazine + water) from 1H-NMR-spectroscopy, The Journal of Chemical Thermodynamics, vol. 35, pp.1277-1289, 8/ (2003).

DOI: 10.1016/s0021-9614(03)00076-4

[3] W. Böttinger, M. Maiwald, and H. Hasse, Online NMR spectroscopic study of species distribution in MEA-H2O-CO2 and DEA-H2O-CO2, Fluid Phase Equilibria, vol. 263, pp.131-143, (2008).

DOI: 10.1016/j.fluid.2007.09.017

[4] J. P. Jakobsen, J. Krane, and H. F. Svendsen, Liquid-Phase Composition Determination in CO2−H2O−Alkanolamine Systems:  An NMR Study, Industrial & Engineering Chemistry Research, vol. 44, pp.9894-9903, 2005/12/01 (2005).

DOI: 10.1021/ie048813+

[5] W. J. Rogers, J. A. Bullin, R. R. Davison, R. E. Frazier, and K. N. Marsh, FTIR method for VLE measurements of acid-gas–alkanolamine systems, AIChE Journal, vol. 43, pp.3223-3231, (1997).

DOI: 10.1002/aic.690431210

[6] W. J. Rogers, J. A. Bullin, and R. R. Davison, FTIR measurements of acid-gas–methyldiethanolamine systems, AIChE Journal, vol. 44, pp.2423-2430, (1998).

DOI: 10.1002/aic.690441110

[7] A. Archane, L. Gicquel, E. Provost, and W. Fürst, Effect of methanol addition on water-CO2-diethanolamine system: Influence on CO2 solubility and on liquid phase speciation, Chemical Engineering Research and Design, vol. 86, pp.592-599, (2008).

DOI: 10.1016/j.cherd.2008.03.005

[8] F. Diab, E. Provost, N. Laloué, P. Alix, V. Souchon, O. Delpoux, et al., Quantitative analysis of the liquid phase by FT-IR spectroscopy in the system CO2/diethanolamine (DEA)/H2O, Fluid Phase Equilibria, vol. 325, pp.90-99, 7/15/ (2012).

DOI: 10.1016/j.fluid.2012.04.016

[9] M. J. Pelletier, Quantitative Analysis Using Raman Spectrometry, Applied Spectroscopy, vol. 57, pp. 20A-42A, 2003/01/01 (2003).

DOI: 10.1366/000370203321165133

[10] Q. Zhao, S. Wang, F. Qin, and C. Chen, Composition Analysis of CO2−NH3−H2O System Based on Raman Spectra, Industrial & Engineering Chemistry Research, vol. 50, pp.5316-5325, 2011/05/04 (2011).

DOI: 10.1021/ie1010178

[11] N. Wen and M. H. Brooker, Ammonium Carbonate, Ammonium Bicarbonate, and Ammonium Carbamate Equilibria: A Raman Study, The Journal of Physical Chemistry, vol. 99, pp.359-368, 1995/01/01 (1995).

DOI: 10.1021/j100001a054

[12] Y. J. Kim, J. K. You, W. H. Hong, K. B. Yi, C. H. Ko, and J. N. Kim, Characteristics of CO2 Absorption into Aqueous Ammonia, Separation Science and Technology, vol. 43, pp.766-777, 2008/02/25 (2008).

DOI: 10.1080/01496390701870606

[13] V. Souchon, M. d. O. Aleixo, O. Delpoux, C. Sagnard, P. Mougin, A. Wender, et al., In situ determination of species distribution in alkanolamine- H2O - CO2 systems by Raman spectroscopy, Energy Procedia, vol. 4, pp.554-561, / (2011).

DOI: 10.1016/j.egypro.2011.01.088