Monoalkylcarbonate formation in the system monoethanolamine–water–carbon dioxide
| Autor: | Erik von Harbou, Elmar Kessler, Kerstin Münnemann, Richard Behrens, Hans Hasse |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Carbamate
Aqueous solution 010405 organic chemistry General Chemical Engineering medicine.medical_treatment Inorganic chemistry General Physics and Astronomy 02 engineering and technology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound N-methyldiethanolamine 13c nmr spectroscopy 020401 chemical engineering chemistry Carbon dioxide medicine Amine gas treating Alkanolamine 0204 chemical engineering Physical and Theoretical Chemistry |
| Zdroj: | Fluid Phase Equilibria. 486:98-105 |
| ISSN: | 0378-3812 |
| DOI: | 10.1016/j.fluid.2018.12.031 |
| Popis: | In a recent study, we have shown by NMR spectrocopy that monoalkylcarbonates are formed in substantial amounts in aqueous solutions of the tertiary alkanolamine methyldiethanolamine (MDEA) upon loading with carbon dioxide ( CO 2 ). These species had been overlooked by most authors previously. In the present work, this study was extended to the primary alkanolamine monoethanolamine (MEA). Also here monoalkylcarbonates were found, but only at CO 2 loadings above 0.5 mol CO 2 per mol MEA. Both the amine and its carbamate form monoalkylcarbonates. The concentration of the monoalkylcarbonates was determined with 13C NMR spectroscopy in a wide range of CO 2 loadings, MEA concentrations, and temperatures. Based on this comprehensive data the chemical equilibirium constants of the formation of the monoalkylcarbonates were determined. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect