Corrosion of A106 carbon steel in a naturally aerated 30 wt.% 2-amino-2-methyl-1-propanol-based solution (AMP, a sterically hindered primary amine) with 0.43 molCO2/molAMP was evaluated at 80 °C. Substantial decrease in corrosion rate, i.e., over two orders of magnitude, was observed over the initial 70 h, which is the result of formation of a protective FeCO3 layer followed by passivation of the A106 surface. Mechanisms for formation of these protective layers are discussed with comparison to corrosion in a 30 wt.% monoethanolamine solution as well as with the help of thermodynamic modeling of the AMP-H2O-CO2 system. Experimental solubility data from literature were employed to extract a thermodynamic model for aqueous solutions of AMP with concentrations ranging from 17.8 to 36.6 wt.% at various CO2 loadings. Liquid phase speciation was determined by employing an electrolyte-NRTL model. The AMP carbamate stability constant, molecule-ion pair, and molecule–molecule interaction parameters in the studied concentrations were obtained. The determined CO2 equilibrium properties are in agreement with previously reported experimental data.
|Number of pages||8|
|Journal||International Journal of Greenhouse Gas Control|
|State||Published - Nov 1 2016|
Bibliographical noteFunding Information:
This work is supported by the State of Kentucky Energy and Environment Cabinet ( PON2 127 1400002757 1 ), which includes the Carbon Management Research Group (CMRG) members of Duke Energy , Electric Power Research Institute (EPRI) , Kentucky Department of Energy Development and Independence (KY-DEDI) , Kentucky Power (AEP), and LG&E and KU Energy .
© 2016 Elsevier Ltd
- Sterically hindered amine
- Thermodynamic modeling
ASJC Scopus subject areas
- Energy (all)
- Management, Monitoring, Policy and Law
- Industrial and Manufacturing Engineering