Journal
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
Volume 6, Issue -, Pages 37-47Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijggc.2011.11.005
Keywords
Gas absorption; Static-analytic apparatus; Vapour-liquid equilibria; CO2; MEA; AMP; Quasi-chemical model
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Funding
- Overseas Research Students Awards Scheme (ORSAS)
- Grantham Institute at Imperial College London
- Innovative Gas Separations for Carbon Capture (IGSCC) EPSRC [EP/G062129/1]
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Despite the importance of the accurate measurement of vapour-liquid equilibria (VLE) data, the reported values, even for well-studied systems such as MEA-H2O-CO2, are scattered. This work centres on the development of an experimental method to measure accurately the VLE of various aqueous amine systems. A static-analytic type of VLE apparatus has been constructed and employed to measure the VLE of CO2 in aqueous monoethanolamine and 2-amino-2-methyl-1-propanol. Gas chromatography was used to analyse the liquid phase compositions. The setup has been validated against literature data for 30 mass% MEA (monoethanolamine) at T=313 and 393 K and was shown to be capable of generating reliable and repeatable data. New measurements for 30 mass% aqueous AMP (2-amino-2-methyl-1-propanol) solutions are also presented at temperatures between 313 and 393 K and a total pressure range of 23-983 kPa. A quasi-chemical model has been employed to interpret the experimental data for the MEA-H2O-CO2 and AMP-H2O-CO2 systems. The average absolute deviation (Delta(AAD)) between model prediction and experimental data is within 7%. (C) 2011 Elsevier Ltd. All rights reserved.
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