Equilibrium Measurements of the NH3-CO2-H2O System: Speciation Based on Raman Spectroscopy and Multivariate Modeling
Journal article, 2017

Liquid speciation is important for reliable process design and optimization of gas-liquid absorption process. Liquid-phase speciation methods are currently available, although they involve tedious and time-consuming laboratory work. Raman spectroscopy is well suited for in situ monitoring of aqueous chemical reactions. Here, we report on the development of a method for speciation of the CO2-NH3-H-2 O equilibrium using Raman spectroscopy and PLS-R modeling. The quantification methodology presented here offers a novel approach to provide rapid and reliable predictions of the carbon distribution of the CO2-NH3-H-2 O system, which may be used for process control and optimization. Validation of the reported speciation method which is based on independent, known, NH3-CO2-H2O solutions shows estimated prediction uncertainties for carbonate, bicarbonate, and carbamate of 6.45 mmol/kg H2O, 34.39 mmol/kg H2O, and 100.9mmol/kg H2O, respectively.


M. Halstensen

University College of Southeast Norway

Henrik Jilvero

Chalmers, Energy and Environment, Energy Technology

W. N. Jinadasa

University College of Southeast Norway

Klaus-Joakim Jens

University College of Southeast Norway

Journal of Chemistry

2090-9063 (ISSN) 2090-9071 (eISSN)

Vol. 2017 Article Number: 7590506- 7590506

Subject Categories

Chemical Process Engineering



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