Molecular Modeling of the Physical Properties for Aqueous Amine Solution Containing a CO2 Hydration Catalyst
| Autor: | Cameron A. Lippert, Wei Shi, Moushumi Sarma, Leland R. Widger, Kunlei Liu, David E. Alman |
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| Rok vydání: | 2017 |
| Předmět: |
Aqueous solution
Chemistry General Chemical Engineering Inorganic chemistry 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Thermal diffusivity 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Catalysis Surface tension Viscosity Adsorption Mass transfer Amine gas treating 0210 nano-technology |
| Zdroj: | Industrial & Engineering Chemistry Research. 56:11644-11651 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/acs.iecr.7b03224 |
| Popis: | The effects of an amphiphilic CO2 hydration catalyst (C3P) on the physical properties of aqueous monoethanolamine (MEA) solutions were studied using molecular simulations and verified experimentally. Adding 2.7–27.7 g/L of C3P in 30 wt % MEA aqueous solution did not significantly affect the solution viscosity, surface tension, or CO2 diffusivity. These results confirm that the previously reported increase in CO2 mass transfer by C3P is due to CO2 hydration catalysis and not due to changes in the physical properties of the MEA solution. Additional simulations indicate that the catalyst molecules tend to aggregate in MEA solution and are preferentially adsorbed at the gas–liquid interface region. For the catalyst molecules remaining in the bulk solution, the local concentrations of CO2 and MEA in the area immediately around the catalyst are increased while the local water concentration is decreased, relative to their concentrations in the rest of the bulk MEA solution. |
| Databáze: | OpenAIRE |
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